Understory vegetation and site condition data from the "Nonnative Invasive Plants" study at the Penobscot Experimental Forest

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Olson, Elizabeth K.
Originator: Kenefic, Laura S.
Originator: Zukswert, Jenna M.
Originator: Langley, CJ M.
Originator: Dibble, Alison C.
Originator: Muñoz Delgado, Bethany L.
Publication_Date: 2019
Title:
Understory vegetation and site condition data from the "Nonnative Invasive Plants" study at the Penobscot Experimental Forest
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2019-0016
Description:
Abstract:
This data publication contains understory plant density and cover class, substrate condition, microtopography, soil drainage, and canopy openness collected in 2006-2007 for 654 milacre plots (milplots) on 327 plots in 24 forest stands representing 10 silvicultural treatments (including an unharvested reference) and an old field on the Penobscot Experimental Forest (PEF) in central Maine, USA. These data were collected to obtain a more complete understanding of the extent of invasive species in a long-term PEF silvicultural experiment, as well as the relationships between treatment, site, and characteristics of the understory plant community.
Purpose:
The objectives of this study were to determine the extent of nonnative invasive plant populations in the Compartment Management Study (CMS) and an old field in the PEF, and to relate characteristics of the understory plant community generally, and invasive plant abundance and distribution specifically, to management history and environmental factors.
Supplemental_Information:
For data relating to the overstory composition of the permanent sample plots (PSPs) in the CMS (the long-term research area in which most of these data were collected), please refer to Kenefic et al. (2015, https://doi.org/10.2737/RDS-2012-0008-2).

We strongly recommend that users read the accompanying documentation provided with the full data publication download before proceeding with data summary or analysis.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 200606
Ending_Date: 200708
Currentness_Reference:
Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent:
The 3,855-acre PEF is located in the towns of Bradley and Eddington, Maine. The CMS was installed on approximately 420 acres located in the northern half of the PEF. The “old fields” used in this study covered approximately 12 acres.
Bounding_Coordinates:
West_Bounding_Coordinate: -68.65750
East_Bounding_Coordinate: -68.58620
North_Bounding_Coordinate: 44.88100
South_Bounding_Coordinate: 44.82690
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Forest & Plant Health
Theme_Keyword: Botany
Theme_Keyword: Inventory, Monitoring, & Analysis
Theme_Keyword: Monitoring
Theme_Keyword: Natural Resource Management & Use
Theme_Keyword: Forest management
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: silviculture
Theme_Keyword: species composition
Theme_Keyword: forest management
Theme_Keyword: forest stand dynamics
Theme_Keyword: tree regeneration
Theme_Keyword: canopy
Theme_Keyword: balsam fir
Theme_Keyword: red spruce
Theme_Keyword: woody plants
Theme_Keyword: nonnative invasive
Theme_Keyword: invasive plant
Theme_Keyword: old-field successional forest
Theme_Keyword: understory vegetation
Theme_Keyword: soil
Theme_Keyword: drainage class
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Penobscot Experimental Forest
Place_Keyword: Maine
Taxonomy:
Keywords/Taxon:
Taxonomic_Keyword_Thesaurus:
None
Taxonomic_Keywords: plants
Taxonomic_Keywords: lichens
Taxonomic_Keywords: multiple species
Taxonomic_Keywords: vegetation
Taxonomic_Keywords: Abies balsamea
Taxonomic_Keywords: Acer rubrum
Taxonomic_Keywords: Aralia nudicaulis
Taxonomic_Keywords: Cornus canadensis
Taxonomic_Keywords: Maianthemum canadense
Taxonomic_Keywords: Onoclea sensibilis
Taxonomic_Keywords: Picea rubens
Taxonomic_Keywords: Pteridium aquilinum
Taxonomic_Keywords: Rubus idaeus
Taxonomic_Keywords: Rubus pubescens
Taxonomic_Keywords: Trientalis borealis
Taxonomic_Keywords: Tsuga canadensis
Taxonomic_Keywords: Acer platanoides
Taxonomic_Keywords: Celastrus orbiculata
Taxonomic_Keywords: Rhamnus frangula
Taxonomic_Keywords: Lonicera
Taxonomic_Keywords: Lythrum salicaria
Taxonomic_Keywords: Rhamnus cathartica
Taxonomic_Keywords: Rosa multiflora
Taxonomic_Keywords: Solanum dulcamara
Taxonomic_Keywords: Valeriana officinalis
Taxonomic_System:
Classification_System/Authority:
Classification_System_Citation:
Citation_Information:
Originator: ITIS
Publication_Date: 2019
Title:
Integrated Taxonomic Information System
Geospatial_Data_Presentation_Form: database
Other_Citation_Details:
Retrieved [March 08, 2019]
Online_Linkage: https://www.itis.gov
Classification_System_Modifications:
Subset of focal species included here (12 most abundant species and 9 invasive species); full list available as a supplemental file (ITIS_Plants_Lichen.html or ITIS_Plants_Lichen.xml).

Important note: Taxonomy provided for Celastrus orbiculata is directly from the PLANTS database (USDA 2019) instead of https://www.itis.gov. There were also a few species name changes between the time these data were collected and now. See Process Steps below for a list of species name changes.

USDA Natural Resources Conservation Service. 2019. PLANTS Database. Greensboro, NC: NRCS National Plant Data Team. https://plants.sc.egov.usda.gov
Taxonomic_Procedures:
Taxonomic_Classification:
Taxon_Rank_Name: Kingdom
Taxon_Rank_Value: Plantae
Applicable_Common_Name: plantes
Applicable_Common_Name: Planta
Applicable_Common_Name: Vegetal
Applicable_Common_Name: plants
Taxonomic_Classification:
Taxon_Rank_Name: Subkingdom
Taxon_Rank_Value: Viridiplantae
Applicable_Common_Name: green plants
Taxonomic_Classification:
Taxon_Rank_Name: Infrakingdom
Taxon_Rank_Value: Streptophyta
Applicable_Common_Name: land plants
Taxonomic_Classification:
Taxon_Rank_Name: Superdivision
Taxon_Rank_Value: Embryophyta
Taxonomic_Classification:
Taxon_Rank_Name: Division
Taxon_Rank_Value: Tracheophyta
Applicable_Common_Name: vascular plants
Applicable_Common_Name: tracheophytes
Taxonomic_Classification:
Taxon_Rank_Name: Subdivision
Taxon_Rank_Value: Spermatophytina
Applicable_Common_Name: spermatophytes
Applicable_Common_Name: seed plants
Applicable_Common_Name: phanérogames
Taxonomic_Classification:
Taxon_Rank_Name: Class
Taxon_Rank_Value: Magnoliopsida
Taxonomic_Classification:
Taxon_Rank_Name: Superorder
Taxon_Rank_Value: Asteranae
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Ericales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Primulaceae
Applicable_Common_Name: primroses
Applicable_Common_Name: primevères
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Trientalis
Applicable_Common_Name: starflower
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Trientalis borealis
Applicable_Common_Name: northern starflower
Applicable_Common_Name: starflower
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Cornales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Cornaceae
Applicable_Common_Name: dogwoods
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Cornus
Applicable_Common_Name: dogwood
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Cornus canadensis
Applicable_Common_Name: Canadian bunchberry
Applicable_Common_Name: bunchberry dogwood
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Dipsacales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Caprifoliaceae
Applicable_Common_Name: honeysuckle
Applicable_Common_Name: chèvrefeuilles
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Lonicera
Applicable_Common_Name: honeysuckle
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Valerianaceae
Applicable_Common_Name: valerians
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Valeriana
Applicable_Common_Name: valerian
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Valeriana officinalis
Applicable_Common_Name: garden heliotrope
Applicable_Common_Name: garden valerian
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Apiales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Araliaceae
Applicable_Common_Name: ginseng
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Aralia
Applicable_Common_Name: spikenard
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Aralia nudicaulis
Applicable_Common_Name: wild sarsaparilla
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Solanales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Solanaceae
Applicable_Common_Name: nightshades
Applicable_Common_Name: solanacées
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Solanum
Applicable_Common_Name: nightshade
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Solanum dulcamara
Applicable_Common_Name: climbing nightshade
Applicable_Common_Name: bitter nightshade
Applicable_Common_Name: bittersweet nightshade
Applicable_Common_Name: blue nightshade
Applicable_Common_Name: European bittersweet
Applicable_Common_Name: fellenwort
Applicable_Common_Name: woody nightshade
Taxonomic_Classification:
Taxon_Rank_Name: Superorder
Taxon_Rank_Value: Lilianae
Applicable_Common_Name: monocots
Applicable_Common_Name: monocotyledons
Applicable_Common_Name: monocotylédones
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Asparagales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Asparagaceae
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Maianthemum
Applicable_Common_Name: mayflower
Applicable_Common_Name: beadruby
Applicable_Common_Name: Solomon's-seal
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Maianthemum canadense
Applicable_Common_Name: Canada mayflower
Applicable_Common_Name: twoleaved Solomonseal
Applicable_Common_Name: false lily-of-the-valley
Taxonomic_Classification:
Taxon_Rank_Name: Superorder
Taxon_Rank_Value: Rosanae
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Rosales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Rosaceae
Applicable_Common_Name: roses
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Rosa
Applicable_Common_Name: wildrose
Applicable_Common_Name: rose
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Rosa multiflora
Applicable_Common_Name: multiflora rose
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Rubus
Applicable_Common_Name: framboises
Applicable_Common_Name: ronces
Applicable_Common_Name: brambles
Applicable_Common_Name: blackberry
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Rubus idaeus
Applicable_Common_Name: common red raspberry
Applicable_Common_Name: western red raspberry
Applicable_Common_Name: American red raspberry
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Rubus pubescens
Applicable_Common_Name: dwarf red raspberry
Applicable_Common_Name: dwarf red blackberry
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Rhamnaceae
Applicable_Common_Name: buckthorns
Applicable_Common_Name: nerpruns
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Rhamnus
Applicable_Common_Name: buckthorn
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Rhamnus cathartica
Applicable_Common_Name: Carolina buckthorn
Applicable_Common_Name: European buckthorn
Applicable_Common_Name: European waythorn
Applicable_Common_Name: Hart's thorn
Applicable_Common_Name: nerprun cathartique
Applicable_Common_Name: common buckthorn
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Rhamnus frangula
Applicable_Common_Name: glossy buckthorn
Applicable_Common_Name: columnar buckthorn
Applicable_Common_Name: European alder
Applicable_Common_Name: fen buckthorn
Applicable_Common_Name: tall hedge buckthorn
Applicable_Common_Name: alder buckthorn
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Myrtales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Lythraceae
Applicable_Common_Name: loosestrife
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Lythrum
Applicable_Common_Name: loosestrife
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Lythrum salicaria
Applicable_Common_Name: purple lythrum
Applicable_Common_Name: rainbow weed
Applicable_Common_Name: spiked loosestrife
Applicable_Common_Name: purple loosestrife
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Celastrales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Celastraceae
Applicable_Common_Name: bittersweet
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Celastrus
Applicable_Common_Name: bittersweet
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Celastrus orbiculatus
Applicable_Common_Name: tsuru-ume-mo-doki
Applicable_Common_Name: Asian bittersweet
Applicable_Common_Name: oriental bittersweet
Applicable_Common_Name: Asiatic bittersweet
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Sapindales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Sapindaceae
Applicable_Common_Name: soapberries
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Acer
Applicable_Common_Name: maples
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Acer rubrum
Applicable_Common_Name: red maple
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Acer platanoides
Applicable_Common_Name: Norway maple
Taxonomic_Classification:
Taxon_Rank_Name: Class
Taxon_Rank_Value: Pinopsida
Applicable_Common_Name: conifers
Taxonomic_Classification:
Taxon_Rank_Name: Subclass
Taxon_Rank_Value: Pinidae
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Pinales
Applicable_Common_Name: pines
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Pinaceae
Applicable_Common_Name: pines
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Abies
Applicable_Common_Name: fir
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Abies balsamea
Applicable_Common_Name: balsam fir
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Picea
Applicable_Common_Name: spruce
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Picea rubens
Applicable_Common_Name: red spruce
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Tsuga
Applicable_Common_Name: hemlock
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Tsuga canadensis
Applicable_Common_Name: Canada hemlock
Applicable_Common_Name: hemlock spruce
Applicable_Common_Name: eastern hemlock
Taxonomic_Classification:
Taxon_Rank_Name: Subdivision
Taxon_Rank_Value: Polypodiophytina
Taxonomic_Classification:
Taxon_Rank_Name: Class
Taxon_Rank_Value: Polypodiopsida
Applicable_Common_Name: leptosporangiate ferns
Taxonomic_Classification:
Taxon_Rank_Name: Subclass
Taxon_Rank_Value: Polypodiidae
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Polypodiales
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Dennstaedtiaceae
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Pteridium
Applicable_Common_Name: brake-fern
Applicable_Common_Name: brackenfern
Applicable_Common_Name: bracken ferns
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Pteridium aquilinum
Applicable_Common_Name: bracken
Applicable_Common_Name: bracken fern
Applicable_Common_Name: brackenfern
Applicable_Common_Name: northern bracken fern
Applicable_Common_Name: western brackenfern
Applicable_Common_Name: fougère des aigles
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Onocleaceae
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Onoclea
Applicable_Common_Name: sensitive fern
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Onoclea sensibilis
Applicable_Common_Name: sensitive fern
Access_Constraints: None
Use_Constraints:
These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Olson, Elizabeth K.; Kenefic, Laura S.; Zukswert, Jenna M.; Langley, CJ M.; Dibble, Alison C.; Muñoz Delgado, Bethany L. 2019. Understory vegetation and site condition data from the "Nonnative Invasive Plants" study at the Penobscot Experimental Forest. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2019-0016
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Laura Kenefic
Contact_Organization: USDA Forest Service, Northern Research Station
Contact_Address:
Address_Type: mailing and physical
Address: 54 Government Road
City: Bradley
State_or_Province: ME
Postal_Code: 04411
Country: USA
Contact_Voice_Telephone: 207-581-2794
Contact_Electronic_Mail_Address: laura.kenefic@usda.gov
Browse_Graphic:
Browse_Graphic_File_Name: \Supplements\PEF_Study_Area_Map.pdf
Browse_Graphic_File_Description:
Adobe Acrobat PDF/a file showing the location of Management Units and the old field location used in this study.
Browse_Graphic_File_Type: PDF
Data_Set_Credit:
Data for this study were provided by a unit of the USDA Forest Service, Northern Research Station, located at the Penobscot Experimental Forest in Maine. Funding for collection of these data was provided by the Northeastern States Research Cooperative and the USDA Forest Service.
Native_Data_Set_Environment:
Experiment data are primarily managed in a Microsoft Access relational database management system.
Cross_Reference:
Citation_Information:
Originator: Brissette, John C.
Originator: Kenefic, Laura S.
Publication_Date: 2014
Title:
Centerpiece of research on the Penobscot Experimental Forest: the U.S. Forest Service long-term silvicultural study
Geospatial_Data_Presentation_Form: document
Other_Citation_Details:
In: Kenefic, Laura S.; Brissette, John C., comps. Penobscot Experimental Forest: 60 years of research and demonstration in Maine, 1950-2010. Gen. Tech. Rep. NRS-P-123. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 31-61.
Online_Linkage: https://www.fs.usda.gov/treesearch/pubs/45577
Cross_Reference:
Citation_Information:
Originator: Kenefic, Laura S.
Originator: Rogers, Nicole S.
Originator: Puhlick, Joshua J.
Originator: Waskiewicz, Justin D.
Originator: Brissette, John C.
Publication_Date: 2015
Title:
Overstory tree and regeneration data from the "Silvicultural Effects on Composition, Structure, and Growth" study at Penobscot Experimental Forest
Edition: 2nd
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: USDA Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2012-0008-2
Cross_Reference:
Citation_Information:
Originator: Bryce, Elizabeth
Publication_Date: 2009
Title:
Influence of silvicultural treatment, site characteristics, and land use history on native and nonnative forest understory plant composition on the Penobscot Experimental Forest in Maine
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Electronic Theses and Dissertations
Issue_Identification: 362
Other_Citation_Details:
M.S. thesis, DigitalCommons@UMaine, 123 p.
Online_Linkage: https://digitalcommons.library.umaine.edu/etd/362
Cross_Reference:
Citation_Information:
Originator: Olson, Elizabeth K.
Originator: Kenefic, Laura S.
Originator: Dibble, Alison C.
Originator: Brissette, John C.
Publication_Date: 2011
Title:
Nonnative invasive plants in the Penobscot Experimental Forest in Maine, USA: Influence of site, silviculture, and land use history
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Journal of the Torrey Botanical Society
Issue_Identification: 138(4): 453-464
Other_Citation_Details:
13 p.
Online_Linkage: https://doi.org/10.3159/torrey-d-10-00019.1
Online_Linkage: https://www.nrs.fs.fed.us/pubs/39990
Cross_Reference:
Citation_Information:
Originator: Bataineh, Mohammad
Originator: Kenefic, Laura S.
Originator: Weiskittel, Aaron
Originator: Wagner, Robert
Originator: Brissette, John C.
Publication_Date: 2013
Title:
Influence of partial harvesting and site factors on the abundance and composition of natural regeneration in the Acadian Forest of Maine, USA
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Forest Ecology and Management
Issue_Identification: 306: 96-106
Other_Citation_Details:
10 p.
Online_Linkage: https://www.nrs.fs.fed.us/pubs/45614
Online_Linkage: https://doi.org/10.1016/j.foreco.2013.06.016
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Measurement Quality Objectives (MQOs) were not defined for this study.

Measurement error associated with percent cover was reduced by having one person estimate percent cover of understory vegetation and substrate at all plots.

Cryptogams (bryophytes and lichens) were identified to genus or group; Lycopodium and Equisetum were identified to genus. Reproductive structures were usually unavailable for Galium and Viola, so these were often identified to genus.

More information on how percent cover classes were assigned, canopy openness estimated, and soil and site conditions measured is provided in the Methodology section of these metadata.


DATA QUALITY ASSURANCE RESULTS:

All four datasets (PEF_Milplot_Cover_and_Site_Condition_NIS, PEF_Plot_Data_Soil_Slope_Aspect_NIS, PEF_Plot_Locations_NIS, and PEF_Understory_Vegetation_NIS) were evaluated for quality assurance, and results are presented below by data table. See the DATA QUALITY ASSURANCE Process Step for more specific information on quality assurance procedures.


1) DATA QA RESULTS FOR PEF_Milplot_Cover_and_Site_Condition_NIS

For clarification of Stands/MUs, plots, and milplots in PEF_Milplot_Cover_and_Site_Condition_NIS, please see the Methodology section.

Cells with “.” were changed to “0”, as appropriate, for MINERALSOILCOVER (603 milplots), ROCKCOVER (408 milplots), DWMCOVER (51 milplots), STUMPCOVER (442 milplots), HWLITTERCOVER (1 milplot: 23B Plot 32B. All other “0” values were recorded in the field), SWLITTERCOVER (1 milplot: 23B Plot 32B. All other “0” values were recorded in the field) and OTHERLITTERCOVER (650 milplots). These represent no cover of these variables, not missing data.

For MICROTOPOGRAPHY, 5 records that had either “DM” or “MD” were changed to “H”. 1 record with “FM” was changed to “MF” to match the other two records of this type, for consistency. Similarly, 4 records with “FS” were changed to “SF” for consistency.


2) DATA QA RESULTS FOR PEF_Plot_Data_Soil_Slope_Aspect_NIS

For clarification of Stands/MUs, plots, and milplots in PEF_Plot_Data_Soil_Slope_Aspect_NIS, please see the Methodology section.

A SLOPE value of 8 percent was changed to 4.57 degrees for MU 21 Plot 35, and of 9 percent changed to 5.14 degrees for MU 22 Plot 41. For MU 24 Plot 12, where a comment specified that the plot sloped in two directions, SLOPE was changed from “4.5/6.0” to the average of those two values (“5.25”) and ASPECT changed from “90/320” to the average of those two values (“205”).

For MU 23A Plot 71, ASPECT was recorded as “NE.” This was changed to “45.”


3) DATA QA RESULTS FOR PEF_Plot_Locations_NIS

For clarification of Stands/MUs and plots in PEF_Plot_Locations_NIS, please see the Methodology section.

For more details on the post-processing of these GPS coordinates, please see the Process Step OVERSTORY PLOT CENTER LOCATIONS.

No additional changes were made beyond those described.



4) DATA QA RESULTS FOR PEF_Understory_Vegetation_NIS

For clarification of Stands/MUs, plots, and milplots in PEF_Understory_Vegetation_NIS, please see the Methodology section.

Four SPECIESID codes were changed to remain consistent with USDA PLANTS database codes (USDA 2019) as of 2019 (PHME13 became ARME6, RUVE5 became RUSE, RUOR2 became RUORB, and MASY2 became MAPU).

Cladina sp., a lichen, is not recognized in ITIS in 2019, as Cladina is now considered a morphotype of Cladonia, but CLADI3 and CLADO3 were retained to distinguish differences observed in morphology (“reindeer” and “cup” lichen for CLADI3 and CLADO3, respectively).

501 records that had a “>” and “50” or greater for STEMCOUNT were changed to “999” to symbolize that these were not exact counts. For these records, field workers stopped counting stems when they reached 50 or more, even though more stems were present.


USDA Natural Resources Conservation Service. 2019. PLANTS Database. Greensboro, NC: NRCS National Plant Data Team. https://plants.sc.egov.usda.gov
Logical_Consistency_Report:
Data were collected on paper field sheets and entered into a spreadsheet using Microsoft Excel. Once data were in electronic format they were compared to the original field sheets. If errors were present in the field-collected data, researchers returned to the field to conduct re-measurements and correct observations when possible.

For milplots in which TOTALBOLECOVER was blank (in PEF_Milplot_Cover_and_Site_Condition_NIS), all records of species identified within the same milplot in PEF_Understory_Vegetation_NIS were inspected to see if other fields indicated the presence of one or more boles on the milplot. If not, these values were changed to “0” in PEF_Milplot_Cover_and_Site_Condition. If yes, these values were changed to blanks to indicate missing data for this variable.

For more details, see the Methodology citation section and supplemental materials (available through full data publication download).
Completeness_Report:
Items that were missing from the three datasets are listed below.

For clarification of Stands/MUs, plots, and milplots, as well as measurements, please see the Methodology section.

In addition to the 2007 data presented in these three data sets, vegetation and site condition data also exist for MU 23A Plot 62 (A and B) from July 18, 2006 and MU 23 Plot 71B from June 20, 2006. These data are not included in this data publication; only the most recent data from these milplots from the time of the study (i.e., June 4, 2007 for MU 23A Plot 62 and June 6, 2007 for MU 23A Plot 71) are presented in this publication.


1) PEF_Milplot_Cover_and_Site_Condition_NIS

TOTALGROUNDCOVER, TOTALHERBCOVER, TOTALWOODYCOVER, and TOTALBOLECOVER were variables added in 2007, the second year of the study. While attempts were made to return to milplots that had been measured in 2006 to obtain estimates for these variables, not all milplots were revisited. As a result, TOTALGROUNDCOVER is missing for 115 milplots, TOTALHERBCOVER is missing for 68 milplots, and TOTALWOODYCOVER is missing for 93 milplots.

TOTALBOLECOVER values are missing for 70 milplots, despite the presence of a bole confirmed in these milplots (confirmed by checking the PEF_Understory_Vegetation_NIS records for the milplot).

HWLITTERTYPE was not recorded on 263 milplots. For 12 of those milplots, HWLITTERCOVER = 0 and so HWLITTERTYPE is not applicable. For the other 251 milplots, these data were not recorded because the hardwood litter had decayed to the point that litter type was not clearly identifiable by field workers.

SWLITTERTYPE was not recorded on 340 milplots. For 37 of those milplots, SWLITTERCOVER = 0 and so SWLITTERTYPE is not applicable. For the remaining 303 milplots, these data were not recorded because the litter was either a mixture of species (no one species seemed to dominate) and/or not clearly identifiable by field workers.

Canopy openness measurements (CANOPYOPEN) are missing for 34 milplots.


2) PEF_Plot_Data_Soil_Slope_Aspect_NIS

There are no soil excavation data (OHORIZON, ELUVIAL HORIZON, MOTTLING, DRAINAGECLASS, BRIGGSCLASS) corresponding with the following plots: MU 28 Plot 61, MU 27 Plot 23, MU 21 Plot 13, and MU 15 Plot 41. A 12-inch-deep soil excavation was made in MU 29B Plot 22, but no mottling was observed, and neither drainage class (DRAINAGECLASS) nor Brigg’s site class (BRIGGSCLASS) were determined. Soil excavations were made but depth to mottling (MOTTLING) not recorded for the following plots: MU 9 Plot 32, MU 15 Plot 45, MU 20 Plot 42, and MU 20 Plot 54. A soil excavation was made for MU 28 Plot 52, but depth of eluvial horizon (ELUVIALHORIZON) was not determined. Therefore, 4 plots have missing values for OHORIZON, 5 plots have missing values for ELUVIALHORIZON, 9 plots have missing values for MOTTLING, and 5 plots have missing values for both DRAINAGECLASS and BRIGGSCLASS.

SLOPE and ASPECT data were not recorded for the old field (AG) plots, and not recorded for the following stands and plots: MU 21 Plots 15, 23, 24, 25, 33, and 34; MU 23A Plot 73. SLOPE is missing for 39 plots. ASPECT is missing for an additional 47 plots, meaning that aspect is missing for a total of 86 plots. For MU 23A Plot 71, ASPECT is an estimate (“NE” was replaced with “45”).


3) PEF_Plot_Locations_NIS
No missing data


4) PEF_Understory_Vegetation_NIS

STEMCOUNT was not recorded for bryophytes and lichens (3,382 records) or for plants outside of the milplot for which EXTRACOVER was measured (119 records; these plants were rooted outside the milplot but had foliage extending into the milplot). STEMCOUNT is otherwise missing for 24 records. Of those 24, COVERCLASS is recorded for 18, but not recorded for six. Of those six records, four are graminoid species in SF T1P3A where the researchers had difficulty distinguishing between species and mentioned in PLOTCOMMENTS (in PEF_Milplot_Cover_and_Site_Condition_NIS) that total cover of all graminoids was 5. The remaining records, missing both STEMCOUNT and COVERCLASS data, are GLST in SF T2P1A and CALE10 in MU 8 Plot 33B. 501 records for STEMCOUNT are “>50”, and so are not exact counts; these entries were recoded as “999”.

COVERCLASS was not recorded for the 119 records in which only EXTRACOVER is recorded. COVERCLASS is missing for an additional 33 records. Of those 33 records, 23 have STEMCOUNT values and 10 do not. These 10 records are CALE10 in MU 8 Plot 33B, HYSP70 in MU 9 Plot 43B, CLADO3 in MU 16 Plot 45B, ALLBRYO in MU 23B Plot 32B, GLST in SF T2P1A, ALLBRO in SF T3P1A, and the four graminoid species in SF T1P3A (mentioned earlier) where STEMCOUNT and cover of individual species (AGPE, CAAR3, CATE3, LUMU2) were not recorded and total graminoid cover was estimated to be class 5.

EXTRACOVER was not recorded for 10,965 records. Of these records, six also do not have either STEMCOUNT or COVERCLASS values. These include the four graminoid species in SF T1P3A (mentioned earlier), GLST in SF T2P1A, and CALE10 in MU 8 Plot 33B.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
Study Site: All research was conducted at the PEF in Maine, USA. A long-term silvicultural experiment encompassing approximately 420 acres was initiated in the PEF by the USDA Forest Service between 1952 and 1957, which is referred to as the CMS. Stand-level silvicultural treatments are twice-replicated, with each experimental unit (called a management unit, or MU) averaging 21 acres each (these are referred to as “stands” in the data sets). Most MUs in the silvicultural experiment have received repeated partial harvests. Treatments include the selection system with five-, ten-, and twenty-year cutting cycles (SC05, SC10, and SC20, respectively), the uniform shelterwood system with two- and three-stage overstory removal (SW2 and SW3, respectively), precommercial thinning (in the three-stage shelterwood: SW3PCT), fixed and modified (flexible) diameter-limit harvests (FDL and MDL), and commercial clearcut (CC). The PEF also includes reference stands that are believed to have received no harvesting since the late 1800s (REF). In addition to natural and silvicultural disturbances, parts of the PEF were affected by human settlement and cultivation prior to 1950. A small area (approximately 12 acres) in the northwestern portion of the PEF was cleared by prior landowners. These old fields of the PEF (AG) were not included in the long-term silvicultural experiment and have no historical stand inventory data.

Data Collection: In this study, 654 milplots on 327 plots were inventoried in 24 forest stands representing 10 silvicultural treatments (including the unharvested reference) and the old fields (refer to \Supplements\Silviculture_Treatments_Nonnative_Invasive_Plants.pdf). The MUs in CMS were inventoried using PSPs, which are the 0.2-acre, 0.05-acre, and 0.02-acre nested circular plots used by the Forest Service for repeated inventories. Understory plant measurements were obtained from two milacre (3.7-ft radius) milplots (subplots) within each PSP.

Plot layout in the old-field stands was modeled after the PSP network in the silvicultural experiment. Eleven transects were set up in each of the four old-field stands, and 32 plots were established. Transects 1, 2, 3, were established in an old field stand on the south side of Government Road at the PEF (SF, or “South Field”). Transects 7, and 8 were also established on the south side of Government Road, but in an area of the old field used for a white spruce (Picea glauca) plantation in 1962 (SP, or “South Plantation”). Transects 4, 5, and 6, were established in an old field stand on the north side of Government Road (NF, or “North Field”). Transects 9, 10, and 11 were established in an area of the old field on the north side of the road that was used for an eastern white pine (Pinus strobus) plantation in 1960 (NP, or “North Plantation”). Distances between plot centers were chosen using a random number generator, constrained by observed distances between plots (i.e., no less than 100 ft apart). Plot numbers represent the transect (e.g, Transect 1 is T1) and the plot number along the transect (Plot 1 is P1). For example, the first plot in Transect 1 is T1P1. Milplots in these plots have an additional letter at the end (e.g., milplot A in the first plot in Transect 1 is SF T1P1A).

In these metadata, the term “stand” is used to refer to both the MUs in the CMS and the four stands identified in the old fields (NF, SF, NP, SP). The term “plot” is used to refer to both the PSPs in the CMS as well as the plots established along transects in the old fields. Milacre subplots in plots are referred to as “milplots.”

The sampling protocols are described below under the appropriate subtitle for each of the three datasets:


1) PEF_Milplot_Cover_and_Site_Condition_NIS

For each milplot, cover class was estimated for total groundcover (TOTALGROUNDCOVER, cover of all vegetation up to 2 feet (ft) above ground level, including bryophytes and lichens), herbaceous cover (TOTALHERBCOVER, cover of all species of sedges, grasses, ferns, other forbs, and subshrubs up to 2 ft above ground level), woody cover (TOTALWOODYCOVER, cover of all species of woody shrubs and trees up to 2 ft above ground level), and bole (TOTALBOLECOVER, percent of ground space occupied by the boles of woody individuals that had a total height above 2 ft tall).

Percent cover of the following were also measured at each milplot using the same scale (from 0 to 7) in order to explore relationships between understory vegetation and site: exposed mineral soil (MINERALSOILCOVER), rock (ROCKCOVER), downed woody material greater than 1 inch in diameter at any point along the piece (DWMCOVER), stumps (STUMPCOVER), hardwood litter (HWLITTERCOVER), softwood litter (SWLITTERCOVER), and other litter (OTHERLITTERCOVER). Types of hardwood and softwood litter were also determined (HWLITTERTYPE and SWLITTERTYPE). Litter type fields were left blank if litter was mixed such that no one species seemed to dominate, or if it was so decayed that it was difficult to distinguish.

Canopy cover directly above the milplot was visually estimated as well, for the lower canopy (LOWERCANOPY, less than 6 ft), mid canopy (MIDCANOPY, 6 to 16 ft), and upper canopy (UPPERCANOPY, greater than 16 ft). Lower canopy cover was assessed using the same scale as the other cover class measurements (0 to 7, though in this case, 1 was used to mean less than 2.5 percent, 2 was omitted, and 3 meant 2.5 to 5 percent), while mid and upper canopy cover were subjectively assigned to milplots by field workers as “none” (N), “partial” (P), or “complete” (C).

As a surrogate for measurements of light in the understory, a single digital image of the canopy above each milplot was taken using a Sigma 8-millimeter 180-degree fisheye lens attached to a Canon EOS Digital Rebel camera positioned on a tripod 2 ft above the forest floor. Gap Light Analyzer (Frazer et al. 1999) software was used to obtain a value for percent canopy openness (CANOPYOPEN). Images were taken in July and August of 2006 and 2007 between 5:30 and 8:00 a.m., and 4:00 and 8:00 p.m. EDT, to avoid direct sunlight. Images were processed using Microsoft PictureIt! Software to increase contrast between vegetation and sky.


2) PEF_Plot_Data_Soil_Slope_Aspect_NIS

Slope (SLOPE) and aspect (ASPECT) were determined in the field at the plot level. To determine soil drainage (Briggs 1994), one soil excavation was made outside of the perimeter of each plot. If the average slope across the plot was greater than 5 percent, or 2.86 degrees, then two soil excavations were made and the measurements were averaged. Thickness of organic horizon (OHORIZON) and the eluvial horizon (ELUVIAL HORIZON) and depth to redoximorphic features (MOTTLING) were measured to the nearest 0.25 inches (in). Depth to mottling was used to determine drainage class (DRAINAGECLASS) and Briggs Site Class (BRIGGSCLASS) in the office (Briggs 1994). For sites in which two soil excavations made had different DRAINAGECLASS and BRIGGSCLASS values, the two DRAINAGECLASS values are presented as both classes together (i.e, PSP for a plot with one P and one SP excavation, and SPMW for a plot with one SP and one MW excavation), and BRIGGSCLASS values are presented as averages, meaning that values with “.5” are possible. Definitions are provided in the Entry and Attribute Overview of this data set.


3) PEF_Plot_Locations_NIS

From 2007 to 2018, Universal Transverse Mercator (UTM) Easting (UTM_EAST) and Northing (UTM_NORTH) coordinates of plot centers were collected in-field using a Trimble Global Positioning System (GPS) unit. Specific Trimble GPS unit and antenna set-up used to collect these coordinates, and under what conditions (i.e. leaf-on or leaf-off), were different for each author (AUTHOR).

Points authored by Kenefic were collected during leaf-on conditions in 2018. A Zephyr 3 antenna was mounted on top of a bi-pod and connected to a Geo7X unit. Location was obtained with submeter accuracy potential using TerraSync. Furthermore, location was not saved until at least 180 positions were logged.

Points authored by Ragot were collected during leaf-on conditions in 2015. A Zephyr antenna was mounted on top of a bi-pod and connected to a GeoXH unit. Location was obtained with submeter accuracy potential using TerraSync. Furthermore, location was not saved until at least 180 positions were logged.

Points authored by Puhlick were collected during leaf-off conditions in 2014. No information on the specific Trimble unit is available.

Points authored by Hayashi were collected during leaf-on conditions in 2013. A Zephyr 2 antenna was mounted on top of a bi-pod and connected to a Trimble GeoXH 6000.

Points authored by Bryce were collected during leaf-on conditions in 2007. A GeoXT unit was used to collect PSP centers.


4) PEF_Understory_Vegetation_NIS

Plant species were identified and assigned a code based on the USDA PLANTS database codes (USDA 2008). These codes were updated in 2019 if necessary (see Process step: SPECIES NAME AND SPECIES CODE CHANGES). Codes were created for unknown plants (indicated by the presence of a “2” as the first character in the code) as well as for groups by growth habit (e.g., ALLBRYO for all bryophytes).

Two lichens were included in the understory vegetation data collection as well: Cladina sp. (CLADI3, reindeer lichen) and Cladonia sp. (CLADO3, cup lichen).

STEMCOUNT is the number of stems for plants under 2 ft tall (except in the case of boles, which are woody plants above 2 ft tall, in which height is not restricted); this was recorded for many plants, but not for bryophytes and lichens, and not for some graminoid species.

Percent cover (COVERCLASS, EXTRACOVER) was estimated for all understory species less than 2 ft tall and for woody species with foliage between 0 and 2 ft using a modified version of the Braun-Blanquet scale (Braun-Blanquet et al. 1932) from 0 to 7: 0 means no presence, 1 means less than 5 percent cover and rare (one or two individuals), 2 means less than 5 percent cover and uncommon (a few individuals, and only found in a few locations within the milplot), 3 means less than 5 percent cover and common (few to many individuals, and scattered throughout the milplot), 4 means between 5 and 25 percent cover, 5 means between 26 and 50 percent cover, 6 means between 51 and 75 percent cover, and 7 means 76 to 100 percent cover. Blank values indicate that cover was not estimated or recorded, in some cases because it was not applicable. Percent cover was visually estimated on all plots by one observer.

The variable COVERCLASS is the cover class of all plants less than 2 ft tall of a single species (or genus) that were rooted in the milplot.

EXTRACOVER is the cover class for 1) plants rooted in the milplot that were taller than 2 ft but had foliage between 0 to 2 ft and 2) plants rooted outside of the milplot but had foliage between 0 and 2 ft extending into the plot.
Methodology_Citation:
Citation_Information:
Originator: Brissette, John C.
Originator: Kenefic, Laura S.
Publication_Date: 2014
Title:
Centerpiece of research on the Penobscot Experimental Forest: the U.S. Forest Service long-term silvicultural study
Geospatial_Data_Presentation_Form: document
Other_Citation_Details:
In: Kenefic, Laura S.; Brissette, John C., comps. Penobscot Experimental Forest: 60 years of research and demonstration in Maine, 1950-2010. Gen. Tech. Rep. NRS-P-123. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 31-61.
Online_Linkage: https://www.fs.usda.gov/treesearch/pubs/45577
Methodology_Citation:
Citation_Information:
Originator: Bryce, Elizabeth
Publication_Date: 2009
Title:
Influence of silvicultural treatment, site characteristics, and land use history on native and nonnative forest understory plant composition on the Penobscot Experimental Forest in Maine
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Electronic Theses and Dissertations
Issue_Identification: 362
Other_Citation_Details:
M.S. thesis, DigitalCommons@UMaine, 123 p.
Online_Linkage: https://digitalcommons.library.umaine.edu/etd/362
Methodology_Citation:
Citation_Information:
Originator: Braun-Blanquet, Josias
Originator: Fuller, George D.
Originator: Conrad, Henry S.
Publication_Date: 1932
Title:
The structural characteristics of the community
Geospatial_Data_Presentation_Form: book chapter
Series_Information:
Series_Name: Plant Sociology: The Study of Plant Communities
Publication_Information:
Publisher: McGraw-Hill
Other_Citation_Details:
p. 26 to 47
Online_Linkage: https://doi.org/10.5962/bhl.title.7161
Methodology_Citation:
Citation_Information:
Originator: Briggs, Russell D.
Publication_Date: 1994
Title:
Site classification field guide
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Maine Agricultural and Forest Experiment Station
Issue_Identification: Misc. Pub. 724
Publication_Information:
Publication_Place: Orono, ME
Publisher: University of Maine
Other_Citation_Details:
15 p.
Online_Linkage: https://www.esf.edu/for/briggs/FOR345/site%20classification%20guide%20-%20briggs.pdf
Methodology_Citation:
Citation_Information:
Originator: Frazer, Gordon W.
Originator: Canham, Charles D.
Originator: Sallaway, Pamela
Originator: Marinakis, Dimitri
Originator: Lertzman, Kenneth P.
Publication_Date: 1999
Title:
Gap Light Analyzer (GLA)
Geospatial_Data_Presentation_Form: model
Publication_Information:
Publication_Place: Burnaby, BC; Millbrook, NY
Publisher: Simon Fraser University; Cary Institute of Ecosystem Studies
Online_Linkage: https://www.caryinstitute.org/science-program/our-scientists/dr-charles-d-canham/gap-light-analyzer-gla
Methodology_Citation:
Citation_Information:
Originator: Microsoft Corporation
Publication_Date: 2002
Title:
Microsoft PictureIt! Photo 7.0 Software
Geospatial_Data_Presentation_Form: software
Publication_Information:
Publisher: Microsoft Corporation
Methodology_Citation:
Citation_Information:
Originator: Olson, Elizabeth K.
Originator: Langley, CJ M.
Originator: Zukswert, Jenna M.
Publication_Date: Unpublished material
Title:
Silvicultural Treatments for "Nonnative Invasive Plants" study at the Penobscot Experimental Forest
Geospatial_Data_Presentation_Form: table
Other_Citation_Details:
Available through full data publication download: \Supplements\Silvicultural Treatments Nonnative Invasive Plants.pdf
Methodology_Citation:
Citation_Information:
Originator: Muñoz Delgado, Bethany L.
Publication_Date: Unpublished material
Title:
PEF Study Area Map
Geospatial_Data_Presentation_Form: map
Other_Citation_Details:
Available through full data publication download: \Supplements\PEF Study Area Map.pdf
Methodology_Citation:
Citation_Information:
Originator: U.S. Forest Service Northern Research Station
Publication_Date: Unpublished material
Title:
Permanent Sample Plot (PSP, also called Continuous Forest Inventory, CFI) Layout in the Compartment Study on the Penobscot Experimental Forest (May 2000 to present)
Geospatial_Data_Presentation_Form: diagram
Other_Citation_Details:
Available through full data publication download: \Supplements\PEF_CompartmentStudy_PlotLayout_2000.pdf
Methodology_Citation:
Citation_Information:
Originator: USDA Natural Resources Conservation Service
Publication_Date: 2008
Title:
PLANTS Database
Geospatial_Data_Presentation_Form: database
Publication_Information:
Publication_Place: Baton Rouge, LA
Publisher: NRCS National Plant Data Team
Online_Linkage: https://plants.sc.egov.usda.gov
Methodology_Citation:
Citation_Information:
Originator: USDA Natural Resources Conservation Service
Publication_Date: 2019
Title:
PLANTS Database
Geospatial_Data_Presentation_Form: database
Publication_Information:
Publication_Place: Greensboro, NC
Publisher: NRCS National Plant Data Team
Online_Linkage: https://plants.sc.egov.usda.gov
Methodology_Citation:
Citation_Information:
Originator: Waskiewicz, Justin D.
Originator: Kenefic, Laura S.
Originator: Rogers, Nicole S.
Originator: Puhlick, Joshua J.
Originator: Brissette, John C.
Originator: Dionne, Richard J.
Publication_Date: 2014
Title:
Sampling and measurement protocols for long-term silvicultural studies on the Penobscot Experimental Forest
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Gen. Tech. Report
Issue_Identification: NRS-147
Publication_Information:
Publication_Place: Newtown Square, PA
Publisher: U.S. Department of Agriculture, Forest Service, Northern Research Station
Other_Citation_Details:
Permanent Sample Plots (p. 4 to 7)
Online_Linkage: https://doi.org/10.2737/NRS-GTR-147
Process_Step:
Process_Description:
DATA QUALITY ASSURANCE:

Three data sets (PEF_Milplot_Cover_and_Site_Condition_NIS, PEF_Plot_Data_Soil_Slope_Aspect_NIS, PEF_Understory_Vegetation_NIS) were cleaned for detectable errors and to ensure consistency across data sets from the PEF. (Note that no changes were made to the PEF_Plot_Locations_NIS file which is referred to above as file 3). The following changes were made:


1) PEF_Milplot_Cover_and_Site_Condition_NIS

DATE was changed from “6/4/07 (also have data from 7-18-06)” to “6/4/2007” for MU 23A Plot 62A and B, and from “6/6/07 (also have data from 6-20-06)” to “6/6/2007” for MU 23A Plot 71B. Data from 7/18/2006 for MU 23A Plots 62A and B and data from 6/20/2006 from MU23A Plot 71B are not included in this data publication.

Treatment codes and plot numbers for the CMS PSPs used in this study were changed to match those reported in the Kenefic et al. (2015) data publication for the Compartment Management Study from the PEF (https://doi.org/10.2737/RDS-2012-0008-2).

TOTALBOLECOVER was changed from “.” to “0” if none of the species records in the milplot (i.e., from PEF_Understory_Vegetation_NIS) were boles. These values were changed to blanks for TOTALBOLECOVER in PEF_Milplot_Cover_and_Site_Condition_NIS if there were boles in the milplots, indicating missing data.

Cells with “.” were changed to “0” for the following columns: MINERALSOILCOVER, ROCKCOVER, DWMCOVER, STUMPCOVER, HWLITTERCOVER, SWLITTERCOVER, and OTHERLITTERCOVER.

Cells with “.” were changed to blank values (missing, not collected, or not applicable) for the following columns, as appropriate: SWLITTERTYPE, HWLITTERTYPE, and CANOPYOPEN.

Cells with “MD” or “DM” for MICROTOPOGRAPHY were changed to “H” for consistency, because mound/depression microtopography was determined to be the same as hummocky in this study.

PLOTCOMMENT values were individually read in 2019 and copied to either the milplot or entire plot (i.e., both milplot records) based on the content of the comment and perceived relevance to either the milplot or entire plot.

Filtering in Excel was used to confirm that cover classes ranged from 0 to 7, and that the date ranges were accurate.

All STAND and PLOT numbers were checked to ensure that all 654 milplots were included in the data set. TREATMENT was verified.


2) PEF_Plot_Data_Soil_Slope_Aspect_NIS

DATE was changed from “6/4/07 (also have data from 7-18-06)” to “6/4/2007” for MU 23A Plot 62. Data from 7/18/2006 for MU 23A Plots 62A and B are not included in this data publication.

Treatment codes and plot numbers for the CMS PSPs used in this study were changed to match those reported in the Kenefic et al. (2015) data publication for the Compartment Management Study from the PEF (https://doi.org/10.2737/RDS-2012-0008-2).

SLOPE values listed as percentages were converted to degrees. SLOPE and ASPECT values listed as “NEED” were changed to blank cells. Slope values listed as “FLAT” were changed to “0”.

Cells with “.” were changed to blank values (missing, not collected, or not applicable) for the following columns, as appropriate: OHORIZON, ELUVIALHORIZON, DRAINAGECLASS, BRIGGSCLASS, MOTTLING, SLOPE, and ASPECT.

Filtering in Excel was used to confirm that cover classes ranged from 0 to 7, and that the date ranges were accurate.

All STAND and PLOT numbers were checked to ensure that all 654 milplots were included in the data set. TREATMENT was verified.


4) PEF_Understory_Vegetation_NIS

DATE was changed from “6/4/07 (also have data from 7-18-06)” to “6/4/2007” for MU 23A Plot 62A and B, and from “6/6/07 (also have data from 6-20-06)” to “6/6/2007” for MU 23A Plot 71B. Data from 7/18/2006 for MU 23A Plots 62A and B and data from 6/20/2006 from MU23A Plot 71B are not included in this data publication.

Species were updated to the most current names in ITIS as of 2019, and several SPECIESID codes were changed to reflect the USDA PLANTS database code (USDA 2019) corresponding with the updated name.

Treatment codes and plot numbers for the CMS PSPs used in this study were changed to match those reported in the Kenefic et al. (2015) data publication for the Compartment Management Study from the PEF (https://doi.org/10.2737/RDS-2012-0008-2).

For data records corresponding to bryophytes and lichens, STEMCOUNT was changed from “.” to blank cells to indicate that stems were not counted and/or these data are missing. STEMCOUNT was also changed to blank cells for plants that had EXTRACOVER values, indicating that the record refers to plants rooted outside of the milplot (119 records). COVERCLASS was changed from “.” to blank cells for these 119 records as well.

STEMCOUNT values that had “>” and a value of 50 or greater were changed to “999” to signify that these stems were not counted above 50.

All values in HAVESPECIMEN that were previously “*” were changed to “1” The HAVESPECIMEN value for the record for “VIOLA” on MU 15 Plot 21B was changed from “very tiny” to “1.” All other records were given a “0”, indicating that there was no specimen.

All records that relate to dead trees were designated “1” for DEAD, and all other records “0.” All records that relate to boles were designated “1” for BOLE, and all other records “0.”

Filtering in Excel was used to confirm that cover classes ranged from 0 to 7, and that the date ranges were accurate.

All STAND and PLOT numbers were checked to ensure that all 654 milplots were included in the data set. TREATMENT was verified.
Source_Used_Citation_Abbreviation:
Kenefic, Laura S.; Rogers, Nicole S.; Puhlick, Joshua J.; Waskiewicz, Justin D.; Brissette, John C. 2015. Overstory tree and regeneration data from the "Silvicultural Effects on Composition, Structure, and Growth" study at Penobscot Experimental Forest. 2nd Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2012-0008-2
Process_Date: 201903
Process_Step:
Process_Description:
SPECIES NAME AND SPECIES CODE CHANGES:

Nine species had name changes in the Integrated Taxonomic Information System (ITIS) between data collection in 2006 and 2007 and data publication in 2019. The following species names changed in the file found in supplements of this data publication (\Supplements\Species Code List.csv):
Dalibarda repens became Rubus repens
Frangula alnus became Rhamnus frangula
Ledum groenlandicum became Rhododendron groenlandicum
Osmunda cinnamomea became Osmundastrum cinnamomeum
Photinia melanocarpa became Aronia melanocarpa
Polygonum sagitattum became Persicaria sagittate
Rubus vermontanus became Rubus setosus
Rumex orbiculatus became Rumex britannica
Malus sylvestris became Malus pumila

The following four species codes (SPECIESID) were changed in the data file \Data\PEF Understory_Vegetation_NIS.csv:
PHME13 became ARME6 (for Aronia melanocarpa)
RUVE5 became RUSE (for Rubus setosus)
RUOR2 became RUORB (for Rumex britannica)
MASY2 became MAPU (for Malus pumila)
Process_Date: 201903
Process_Step:
Process_Description:
OVERSTORY PLOT CENTER LOCATIONS:

All GPS locations were post-processed using GPS Pathfinder Office. Location data are projected to Universal Transverse Mercator Zone 19N (PROJECTION), North American Datum of 1983 (DATUM).

Points authored by Kenefic were processed in 2018.
Points authored by Ragot were processed in 2015.
Points authored by Puhlick were processed in 2014.
Points authored by Hayashi were processed in 2013.
Points authored by Bryce were processed in 2007.
Process_Date: 2018
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
DATA FILES

This data package contains four (4) data files (found in the \Data folder in full data publication download). Below is a list of these files and the variables they contain.

1) PEF Milplot Cover and Site Conditions for Nonnative Invasives Study

\Data\PEF_Milplot_Cover_and_Site_Condition_NIS.csv: Comma-delimited ASCII text file containing milplot-level cover class data relating to vegetation and substrate. Variables are described below.

DATE = Date sampled (mm/dd/yyyy).

TREATMENT = Silvicultural treatment applied to management unit (MU). SC10= single-tree selection cutting on a 10-year cutting cycle, SC20= single-tree selection cutting on a 20-year cutting cycle, SC05= single-tree selection cutting on a 5-year cutting cycle, CC= commercial clearcut, FDL= fixed diameter-limit cut, MDL= modified diameter-limit cut, AG= old field, REF = reference, SW2= uniform shelterwood with 2-stage overstory removal, SW3= uniform shelterwood with 3-stage overstory removal, SW3PCT= uniform shelterwood with 3-stage overstory removal with precommercial thinning.

STAND = Experimental unit. For stands in the CMS, this is the Management Unit (MU) number. The four stands in the old field (AG) part of the PEF and not in the CMS are NF (“North Field”), SF (“South Field”), NP (“North Plantation”), and SP (“South Plantation”).

PLOT = Plot number. This refers to the permanent sample plot, or PSP, in the CMS study. For plots with a similar layout established along transects in the old field plots, T represents the transect number and P represents the plot number (e.g., Transect 1 Plot 1 is T1P1).

MILPLOT = Milplot (milacre subplot within plot) label. Possible values include A, B, C, and D.

TOTALGROUNDCOVER = Percent cover of all plant life including bryophytes and lichens, up to 2 feet (ft) above ground level. 0 = no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover. Blank values indicate not recorded.

TOTALHERBCOVER = Percent cover of all vascular plant species (including grasses, sedges, ferns, forbs, and subshrubs) up to 2 ft above ground level. 0 = no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover. Blank values indicate not recorded.

TOTALWOODYCOVER = Percent cover of all woody shrubs and trees up to 2 ft above ground level. 0 = no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover. Blank values indicate not recorded.

TOTALBOLECOVER = Percent of ground space within the milplot occupied by the boles of woody plants that had a total height greater than 2 ft tall (stems of woody plants with a total height less than 2 ft tall were not included). 0 = no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover. Blank values indicate not recorded.

MINERALSOILCOVER = Percent of the ground surface occupied by exposed mineral soil. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

ROCKCOVER = Percent of the ground surface occupied by exposed rock; this can also include rock covered by bryophytes or lichens if this condition was obvious to the field workers. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

DWMCOVER = Dead woody material cover. Percent of the milplot covered by woody litter >1-inch diameter at any point along the piece. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

STUMPCOVER = Percent of the milplot covered by stumps (all sizes included) from harvests and stem breakage. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

HWLITTERTYPE = Type of hardwood litter. See list of species codes in \Supplements folder. “Populus” used instead of species code to refer to litter from the genus Populus. Blank values are either not applicable or not recorded.

HWLITTERCOVER = Percent of the ground surface covered by hardwood litter. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover

SWLITTERTYPE = Type of softwood litter. See list of species codes in \Supplements folder. “Mix” means that a mix of species were present. Blank values are either not applicable or not recorded.

SWLITTERCOVER = Percent of the ground surface covered by softwood litter. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

OTHERLITTERCOVER = Percent of the ground surface covered by other litter, meaning litter that did not originate from a tree. Type of litter is specified (see list of species in \Supplements folder) as well as cover class. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

MICROTOPOGRAPHY = Description of microtopographical features observed at the milplot level. M= mound, D= depression, S= slope, F= flat, H= hummocky. Combinations are possible if there are multiple microtopography features within a milplot.

LOWERCANOPY = Lower canopy cover (2-6 ft). 1= less than 2.5 percent cover, 3= 2.5 to 5 percent cover, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover.

MIDCANOPY = Mid canopy cover (6 -16 ft). N= no cover, P= partial cover, C= complete cover (subjective designation by researchers).

UPPERCANOPY = Upper canopy cover (greater than 16 ft). N= no cover, P=partial cover, C=complete cover (subjective designation by researchers).

CANOPYOPEN = Percent open canopy. Determined from a photograph from a digital camera fit with a 180-degree wide lens, positioned at the milplot center 2 ft above the forest floor.

PLOTCOMMENTS = Noted unusual conditions of the plot or milplots, and other plants observed nearby, especially if they were nonnative invasive. Comments refer to either the whole milplot or entire plot, depending on the content of the comment.


2) PEF Plot, Soil, Slop, and Aspect data for Nonnative Invasives Study
\Data\PEF_Plot_Data_Soil_Slope_Aspect_NIS.csv: Comma-delimited ASCII text file containing plot-level soil variables as well as slope and aspect. Variables are described below.

DATE = Date sampled (mm/dd/yyyy).

TREATMENT = Silvicultural treatment applied to management unit (MU). SC10= single-tree selection cutting on a 10-year cutting cycle, SC20= single-tree selection cutting on a 20-year cutting cycle, SC05= single-tree selection cutting on a 5-year cutting cycle, CC= commercial clearcut, FDL= fixed diameter-limit cut, MDL= modified diameter-limit cut, AG= old field, REF = reference, SW2= uniform shelterwood with 2-stage overstory removal, SW3= uniform shelterwood with 3-stage overstory removal, SW3PCT= uniform shelterwood with 3-stage overstory removal with precommercial thinning.

STAND = Experimental unit. For stands in the CMS, this is the Management Unit (MU) number. The four stands in the old field (AG) part of the PEF and not in the CMS are NF (“North Field”), SF (“South Field”), NP (“North Plantation”), and SP (“South Plantation”).

PLOT = Plot number. This refers to the permanent sample plot, or PSP, in the CMS study. For plots with a similar layout established along transects in the old field plots, T represents the transect number and P represents the plot number (e.g., Transect 1 Plot 1 is T1P1).

OHORIZON = The thickness of the Oi, Oe, and Oa soil horizons combined (inches). Blank values are either not applicable or not recorded.

ELUVIALHORIZON = The thickness of the eluvial soil horizon (inches). Blank values are either not applicable or not recorded.

MOTTLING = The depth that evidence of mottling (redoximorphic features) was first seen in soil (inches). Blank values are either not applicable or not recorded.

DRAINAGECLASS = Soil drainage class, determined by depth to mottling. W= well (mottling depth > 24 inches [in]), MW= moderately well (16 to 24 in), SP= somewhat poorly (6 to 16 in), P = poorly (4 to 6 in), VP= very poorly (less than 4 in). PSP indicates a plot where one soil excavation was P and another was SP, SPMW indicates a plot where one excavation was SP and another MW. See Site Classification Field Guide (1994) by RD Briggs, in Methodology citation. Blank values are either not applicable or not recorded.

BRIGGSCLASS = Briggs Site Class (Briggs 1994), assigned on a scale of 1 to 5 and reflects soil drainage at a plot. 1= well drained or somewhat excessively drained, 2= moderately well drained, 3= somewhat poorly drained, 4= poorly drained, 5= very poorly drained. Values with “.5” (i.e., “3.5”) are averages of two soil excavations with different Briggs Site Class values. See Site Classification Field Guide (1994) by RD Briggs, in Methodology citation. Blank values are either not applicable or not recorded.

SLOPE = Plot slope in degrees. Blank values are either not applicable or not recorded.

ASPECT = Plot aspect in degrees (0 through 360). Blank values are either not applicable or not recorded.


3) PEF Plot Locations for Nonnative Invasives Study

\Data\PEF_Plot_Locations_NIS.csv: Comma-delimited ASCII text containing the most up-to-date coordinates for the plots used in this study, as of 2019. Variables are defined below.

STAND = Experimental unit. For stands in the CMS, this is the Management Unit (MU) number. The four stands in the old field (AG) part of the PEF and not in the CMS are NF (“North Field”), SF (“South Field”), NP (“North Plantation”), and SP (“South Plantation”).

PLOT = Plot number. This refers to the permanent sample plot, or PSP, in the CMS study. For plots with a similar layout established along transects in the old field plots, T represents the transect number and P represents the plot number (e.g., Transect 1 Plot 1 is T1P1).

UTM_East= UTM (Universal Transverse Mercator) easting

UTM_North= UTM (Universal Transverse Mercator) northing

DATUM= Datum used to collect coordinates. NAD83= North American Datum of 1983

PROJECTION= Projection, which is the UTM zone (19N)

AUTHOR= Last name of the researcher or technician who collected the GPS points. Bryce= Elizabeth Bryce (now Olson), Hayashi= Rei Hayashi, Kenefic= Liam Kenefic,
Puhlick = Joshua Puhlick, Ragot= Zachary Ragot.


4) PEF Understory Vegetation data for Nonnative Invasives Study

\Data\PEF_Understory_Vegetation_NIS.csv: Comma-delimited ASCII text containing understory vegetation data. Variables are defined below. See the Methodology section of this metadata document for more details on these measurements and variables.

DATE = Date sampled (mm/dd/yyyy).

TREATMENT = Silvicultural treatment applied to management unit (MU). SC10= single-tree selection cutting on a 10-year cutting cycle, SC20= single-tree selection cutting on a 20-year cutting cycle, SC05= single-tree selection cutting on a 5-year cutting cycle, CC= commercial clearcut, FDL= fixed diameter-limit cut, MDL= modified diameter-limit cut, AG= old field, REF = reference, SW2= uniform shelterwood with 2-stage overstory removal, SW3= uniform shelterwood with 3-stage overstory removal, SW3PCT= uniform shelterwood with 3-stage overstory removal with precommercial thinning.

STAND = Experimental unit. For stands in the CMS, this is the Management Unit (MU) number. The four stands in the old field (AG) part of the PEF and not in the CMS are NF (“North Field”), SF (“South Field”), NP (“North Plantation”), and SP (“South Plantation”).

PLOT = Plot number. This refers to the permanent sample plot, or PSP, in the CMS study. For plots with a similar layout established along transects in the old field plots, T represents the transect number and P represents the plot number (e.g., Transect 1 Plot 1 is T1P1).

MILPLOT = Milplot (milacre subplot within plot) label. Possible values include A, B, C, and D.

SPECIESID = Species code. See list of species codes in \Supplements folder.

DEAD= Records are “0” for trees that were alive, and are “1” for trees that were dead.

BOLE = If “1”, this record refers to trees or shrubs with total height over 2 ft tall. The foliage of these taller woody plants is included in “EXTRACOVER.” If “0”, the plants are under 2 ft tall.

STEMCOUNT = Number of stems of plants less than 2 ft in height (unless boles, in which case height is not restricted). Field workers usually stopped counting at 50 individuals. If they stopped at 50, but more stems were present, this is indicated by “999”. Blank values are either not applicable or not recorded.

COVERCLASS= Percent cover of species up to 2 ft above ground level. 0= no presence, 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover. Blank values are either not applicable or not recorded.

EXTRACOVER = Percent cover, up to 2 ft above ground level, from individual plants that are 1) rooted in the milplot with total height greater than 2 ft tall, and/or 2) are rooted outside the milplot but have foliage leaning into the milplot. 1= less than 5 percent cover and rare, 2= less than 5 percent cover and uncommon, 3= less than 5 percent cover and common, 4= 5 to 25 percent cover, 5= 26 to 50 percent cover, 6= 51 to 75 percent cover, 7= 76 to 100 percent cover. Blank values indicate either not applicable or not recorded.

HAVESPECIMEN = “1” indicates a dried and pressed specimen, otherwise “0”. Specimens at archived at the Arthur C. Hart Building at 54 Government Road at the Penobscot Experimental Forest in Bradley, Maine, USA.
Entity_and_Attribute_Detail_Citation:
For more details, see the Methodology citation section included in this data publication..
Overview_Description:
Entity_and_Attribute_Overview:
SUPPLEMENTAL FILES

This data package also contains six (6) additional files (found in \Supplements folder in full data publication download) that are crucial to understanding these data. Below is a list of these files and a brief description of each.

1 & 2) Plant and lichen taxonomic classification

\Supplements\ITIS_Plants_Lichens.html &
\Supplements\ITIS_Plants_Lichens.xml: HTML and XML files containing the complete ITIS taxonomy of all plant and lichen taxa included in this study.


3) Permanent Sample Plot (PSP, also called Continuous Forest Inventory, CFI) Layout in the Compartment Study on the Penobscot Experimental Forest (May 2000 to present)

\Supplements\PEF_CompartmentStudy_PlotLayout_2000.pdf: Adobe Acrobat PDF/a file containing a diagram of plot layouts used in the CMS run by the USDA Forest Service at the PEF from 2000 onwards. This matches the layout of the plots used in this study.


4) PEF Study Area Map

\Supplements\PEF Study Area Map.pdf: Adobe Acrobat PDF/a file containing a map of the study area at the Penobscot Experimental Forest, with the MUs and Old Fields identified (“Inventoried by E. Olson (2009)” and “Old Fields”, respectively). Old Field Plantations are including within Old Fields, but not differentiated.


5) Silvicultural Treatments Nonnative Invasive Plants

\Supplements\Silvicultural_Treatments_Nonnative_Invasive_Plants.pdf: Adobe Acrobat PDF/a file containing table outlining the silvicultural treatments applied to management units (MUs) in which these data were obtained. Variables are described below.

STAND ID = number assigned to the management unit (MU) in which this treatment was implemented if part of the CMS, or abbreviation identifying the old field stand (NF, NP, SF, or SP).

TREATMENT NAME = name of silvicultural treatment applied to management unit

ABBREVIATION = abbreviation of the treatment name

TOTAL NUMBER OF HARVESTS = total number of harvests prior to 2006 in that MU since 1952, when the CMS was initiated.

DATE OF LAST HARVEST = month/year in which the last harvest took place, as of 2006.

% BASAL AREA REDUCTION = percentage of basal area (of trees ≥ 0.5 in DBH) removed in the most recent harvest (as of 2006).

NUMBER OF PLOTS = number of plots in the MU in 2006.


6) Species Code List

\Supplements\Species_Code_List.csv: Comma-delimited ASCII text file containing definitions for each species code. Variables are described below.

SPECIESID = Species code. Most correspond with species codes used by the USDA in the PLANTS database (USDA 2019) https://plants.sc.egov.usda.gov

GROWTH HABIT = Growth habit of the species: herb= herbaceous, bryo= bryophyte, lichen= lichen, shrub= shrub, tree= tree, gramin= graminoid, fern= fern, subshrub= sub shrub, vine= vine.

GENUS SPECIES= Genus and specific epithet of plant

SCIENTIFIC NAME = Scientific name, which includes genus, specific epithet, and author

COMMON NAME = Common name of the plant
Entity_and_Attribute_Detail_Citation:
Briggs, Russell D. 1994. Site classification field guide. Maine Agricultural and Forest Experiment Station, Misc. Pub. 724. Orono, ME: University of Maine. 15 p. https://www.esf.edu/for/briggs/FOR345/site%20classification%20guide%20-%20briggs.pdf

USDA Natural Resources Conservation Service. 2019. PLANTS Database. Greensboro, NC: NRCS National Plant Data Team. https://plants.sc.egov.usda.gov

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Distribution_Information:
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Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Research and Development
Contact_Position: Research Data Archivist
Contact_Address:
Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: CO
Postal_Code: 80526
Country: USA
Contact_Voice_Telephone: see Contact Instructions
Contact Instructions: This contact information was current as of May 2019. For current information see Contact us page on: https://doi.org/10.2737/RDS
Resource_Description: RDS-2019-0016
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Metadata documents have been reviewed for accuracy and completeness. Unless otherwise stated, all data and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. However, neither the author, the Archive, nor any part of the federal government can assure the reliability or suitability of these data for a particular purpose. The act of distribution shall not constitute any such warranty, and no responsibility is assumed for a user's application of these data or related materials.

The metadata, data, or related materials may be updated without notification. If a user believes errors are present in the metadata, data or related materials, please use the information in (1) Identification Information: Point of Contact, (2) Metadata Reference: Metadata Contact, or (3) Distribution Information: Distributor to notify the author or the Archive of the issues.
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Comma-delimited ASCII text file (CSV)
File_Decompression_Technique: Files zipped with 7-Zip 18.05
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Network_Address:
Network_Resource_Name: https://doi.org/10.2737/RDS-2019-0016
Digital_Form:
Digital_Transfer_Information:
Format_Name: PDF
Format_Version_Number: see Format Specification
Format_Specification:
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Metadata_Reference_Information:
Metadata_Date: 20190514
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Laura Kenefic
Contact_Organization: USDA Forest Service, Northern Research Station
Contact_Address:
Address_Type: mailing and physical
Address: 54 Government Road
City: Bradley
State_or_Province: ME
Postal_Code: 04411
Country: USA
Contact_Voice_Telephone: 207-581-2794
Contact_Electronic_Mail_Address: laura.kenefic@usda.gov
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
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