Trask River Watershed Study: Epilithic algal biomass and chlorophyll a concentrations, 2006-2016

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Ashkenas, Linda R.
Publication_Date: 2022
Title:
Trask River Watershed Study: Epilithic algal biomass and chlorophyll a concentrations, 2006-2016
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-2022-0001
Description:
Abstract:
These data are a portion of the larger Trask River Watershed Study which was conducted in the East Fork of the South Fork Trask River of the Coast Range of western Oregon. Basin-wide surveys of epilithic benthic communities were conducted over the course of this study. Samples were collected seasonally in spring, early summer, and late summer and were analyzed for standing stocks of epilithic communities and chlorophyll a (photosynthetic pigment abundance). The sampling was conducted before and after forest harvest to provide insights into the effects of these treatments both locally and downstream.

The Trask River Watershed study area consists of 4 large catchments: Pothole Creek, Gus Creek, Rock Creek, and Upper Main Trask. Within each of the four catchments, 2-4 headwater sites and a downstream site were sampled. In general, Trask River Watershed study data were collected during pre-harvest (2006-2011) and post-harvest (2013-2016) periods, from treated and reference headwater watersheds and from downstream sites. Sampling for the data included in this data publication began in June 2006 and concluded in July 2016. Spring sampling was limited due to site access constraints such as snow and flooding. In 2006, only a limited number of samples were collected. Sampling in late summer only occurred at the larger downstream sites. Site reaches were approximately 30 meters in length in headwater streams and 50-100 meters at downstream sites. Sample collection consisted of scrubbing known areas of hard substrates (primarily cobble sized) and washing scrubbed material into containers. Four samples, or replicates, were collected for each headwater site and six at downstream sites. Processing occurred within 1 month of sample collection to prevent degradation of photopigments. Samples were analyzed to determine phaeophytin concentration, chlorophyll a concentration, dry mass, and ash-free dry mass.
Purpose:
These data are a portion of the larger Trask River Watershed Study. The general objectives of the Trask River Watershed Study were to investigate the effects of forest harvest on the physical, chemical and biological characteristics of small headwater streams, and the extent to which alterations in stream conditions caused by harvest along headwater channels influence the physical, chemical and biological characteristics of downstream fish-bearing streams. This sampling was designed to characterize the standing stock abundances and chlorophyll a concentrations of autochthonous benthic periphyton communities, which can be an important source of food for stream-dwelling organisms.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20060626
Ending_Date: 20160714
Currentness_Reference:
Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
The Trask River Watershed study area is on the windward side of the north Oregon Coast Range and elevation ranges from 275 meters (m) to 1,100 m. During the study period (2006-2016), the mean annual precipitation was approximately 2100 millimeters (mm), with the majority falling in November and December. Most precipitation falls as rain; however, snowfall is frequent above 760 m during winter. Summers were typically warm and dry. Summertime mean maximum air temperature was 23.6 °Celsius (°C) and the mean minimum air temperature was 8.7 °C. The geology consists of a mix of volcanic and sedimentary formations with numerous ancient earthflow deposits (Wells et al. 1994). The overstory vegetation primarily consisted of approximately 50-year-old Douglas-fir (Pseudotsuga menziesii) with some areas of hardwood, predominantly red alder (Alnus rubra), along stream channels and in some localized hillside areas. The current vegetation and land ownership pattern resulted from a series of large forest fires between 1933 and 1951 known as the Tillamook Burn (Neiland 1958).

The eastern 11.0 square kilometer (km²) of the study watershed was owned by Weyerhaeuser Company, a large, private industrial timber company. The State of Oregon owned the western 14.3 km² of the watershed and was managed by Oregon Department of Forestry (ODF). In addition, there was a small area (0.7 km²) of federally owned land in the northeastern portion of the study watershed that is managed by Bureau of Land Management.

Wells, R. E.; Snavely Jr., P. D.; MacLeod, N. S.; Kelly, M. M.; Parker, M. J. 1994. Geologic map of the Tillamook Highlands, northwest Oregon Coast Range (Tillamook, Nehalem, Enright, Timber, Fairdale, and Blaine 15 minute quadrangles). U.S. Geological Survey Open-File Report 94-21. https://doi.org/10.3133/ofr9421

Neiland, Bonita J. 1958. Forest and adjacent burn in the Tillamook burn area of northwestern Oregon. Ecology 39(4): 660-671. https://doi.org/10.2307/1931606
Bounding_Coordinates:
West_Bounding_Coordinate: -123.54336
East_Bounding_Coordinate: -123.43486
North_Bounding_Coordinate: 45.39423
South_Bounding_Coordinate: 45.33077
Bounding_Altitudes:
Altitude_Minimum: 313.470
Altitude_Maximum: 805.110
Altitude_Distance_Units: meters
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: inlandWaters
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Hydrology, watersheds, sedimentation
Theme_Keyword: Forest & Plant Health
Theme_Keyword: Air, soil, water pollution (environmental injury)
Theme_Keyword: Inventory, Monitoring, & Analysis
Theme_Keyword: Assessments
Theme_Keyword: Biometrics
Theme_Keyword: Monitoring
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: forest-stream interactions
Theme_Keyword: aquatic ecosystems
Theme_Keyword: streams
Theme_Keyword: algae
Theme_Keyword: periphyton
Theme_Keyword: biomass
Theme_Keyword: chlorophyll
Theme_Keyword: phaeophytin
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Oregon
Place_Keyword: Trask River
Place_Keyword: Trask basin study area
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:

Johnson, Sherri L.; Ashkenas, Linda R. 2022. Trask River Watershed Study: Epilithic algal biomass and chlorophyll a concentrations, 2006-2016. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2022-0001
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sherri L. Johnson
Contact_Organization: USDA Forest Service, Pacific Northwest Research Station
Contact_Position: Principal Investigator
Contact_Address:
Address_Type: mailing and physical
Address: 3200 SW Jefferson Way
City: Corvallis
State_or_Province: OR
Postal_Code: 97331
Country: USA
Contact_Voice_Telephone: 541-758-7771
Contact_Electronic_Mail_Address: sherri.johnson2@usda.gov; sherrijohnson717@comcast.net
Browse_Graphic:
Browse_Graphic_File_Name: \Supplements\Trask_Watersheds_maps_photos.pdf
Browse_Graphic_File_Description:
Maps of the Trask River Watershed study area and Trask River headwater watersheds.
Browse_Graphic_File_Type: PDF
Data_Set_Credit:
Oregon Department of Forestry; Weyerhaeuser Company; Watershed Research Cooperative at Oregon State University; and the USDA Forest Service, Pacific Northwest Research Station provided the majority of funding for the core Trask Watershed Research Study.


Author Information:

Johnson, Sherri L.
USDA Forest Service, Pacific Northwest Research Station
https://orcid.org/0000-0002-4223-3465

Ashkenas, Linda R.
Oregon State University - Department of Fisheries, Wildlife, and Conservation Sciences
Cross_Reference:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Ashkenas, Linda R.
Publication_Date: 2022
Title:
Trask River Watershed Study: Stream chemistry, 2006-2016
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-2022-0002
Cross_Reference:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Ashkenas, Linda R.
Publication_Date: 2022
Title:
Trask River Watershed Study: Fine benthic material sampling, 2008-2016
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-2022-0003
Cross_Reference:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Skaugset, Arne
Originator: Simmons, Amy
Originator: Ashkenas, Linda R.
Publication_Date: 2022
Title:
Trask River Watershed Study: Stream discharge, 2007-2016
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-2022-0004
Cross_Reference:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Li, Judith L.
Originator: Sobota, Janel Banks
Originator: Gerth, William J.
Publication_Date: 2022
Title:
Trask River Watershed Study: Benthic macroinvertebrate sampling, 2006-2016
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-2022-0005
Cross_Reference:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Reiter, Maryanne
Originator: Ashkenas, Linda R.
Publication_Date: 2022
Title:
Trask River Watershed Study: Stream temperature, conductivity, and air temperature, 2007-2016
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-2022-0007
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Blanks (95% ethanol) run ca. 10 samples during spectrophotometer analysis.

The dataset is not a survey document and should not be utilized as such. While strong efforts are made to ensure data accuracy, complete accuracy of all data cannot be guaranteed. All data are made available "as is." The Trask River Watershed Study group and the Watersheds Research Cooperative make every effort to provide and maintain accurate, complete, usable, and timely information. However, some data and information may, of necessity, be preliminary in nature. These data and information are provided with the understanding that they are not guaranteed to be correct or complete. Users are cautioned to carefully consider the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data and information. Conclusions drawn from, or actions undertaken based on, such data and information are the sole responsibility of the user.
Logical_Consistency_Report:
Data were visually inspected for consistency by Linda R. Ashkenas.
Completeness_Report:
Some data values are missing due to instrument failure, sample contamination, or spillage. Missing data are left blank (empty cell). The reason for missing data in a sample is listed in the "Comments" column of the data sheet.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
HARVEST DETAILS

The Trask Watershed Study employed a nested design that consisted of four larger catchments - Rock Creek (RC), Pothole (PH), Gus (GS), and Upper Main (UM) - with up to four small study watersheds within each. For our BACI (before-after-control-impact) design, one watershed (PH3, GS1, UM1) in each larger catchment was not harvested and remained as a reference, in addition to two reference watersheds in Rock Creek (RK1, RK3). These reference watersheds served as external and internal references for baseline responses to year-to-year variability. The "before" or pre-harvest sampling occurred from 2006-2011. Road upgrade and road construction activities started in summer 2011, after the annual sampling in June. During forest harvest in 2012, access to the sites was restricted and no sampling occurred. The "after" or post-harvest sampling started in 2013 and continued through 2016.

Forest harvest in the seven treated watersheds was planned for full watershed areas upstream of our sampling sites (Reiter et al. 2020; Johnson et al. 2022). Riparian treatments followed the Oregon Forest Practices Act for private forests (ODF, 2010b) and Forest Management Plan for State Forests (ODF, 2010a). Watersheds UM3, UM2, and GS3, owned by private forest companies, were clearcut with variable to no buffers, because riparian buffers were not required in these fishless headwaters (ODF, 2010b). However, as shown in aerial photos (Supplemental Figure, Johnson et al. 2022), some riparian trees were not harvested immediately adjacent to downstream portions of our study reaches at UM2 and UM3. These ‘leave trees’ were a mix of species (alder, maple and Douglas-fir) that were not cut because either they stabilized slopes or were located on soils that were too wet for machinery.

On State Forest land, which is managed by Oregon Department of Forestry, the required minimum riparian buffer prescription for small fishless streams included a 7.6 m no-cut zone from each edge of the stream plus variable no-cut zones extending from 7.6 m to 15.2 m from the stream banks, based on site-specific criteria (ODF 2010a, Appendix J). After harvest, each side of the perennial streams in Pothole small watersheds had no harvest within 12 m (measured in horizontal distance) of each side of the stream. The clearcuts in Pothole catchment were termed ‘modified’ because selected trees throughout the watershed were not harvested (Supplemental Figure, Johnson et al. 2022) to meet green tree retention requirements.

In small watershed GS2, which was the only watershed on federal land and was managed by the Bureau of Land Management, forest management involved thinning using helicopter logging. A 15 m, no-entry buffer remained on each side of the stream.

More details about sites and watersheds are available in this data publication as supplemental files.
Methodology_Citation:
Citation_Information:
Originator: Johnson, Sherri L.
Originator: Li, Judith L.
Originator: Sobota, Janel B.
Originator: Ashkenas, Linda R.
Originator: Pollock, Amanda M.
Originator: Meleason, Mark A.
Originator: Ganio, Lisa
Publication_Date: 2022
Title:
Macroinvertebrate responses to differing riparian treatments following forest harvest in the headwaters of Trask River watershed
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Forest Ecology and Management
Issue_Identification: 508: 119999
Online_Linkage: https://doi.org/10.1016/j.foreco.2021.119999
Methodology_Citation:
Citation_Information:
Originator: ODF (Oregon Department of Forestry)
Publication_Date: 2010
Title:
Northwest Oregon State Forests Management Plan, Appendix J: Management Standards for Aquatic and Riparian Areas
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Salem, OR
Publisher: Oregon Department of Forestry
Methodology_Citation:
Citation_Information:
Originator: ODF (Oregon Department of Forestry)
Publication_Date: 2010
Title:
Oregon Forest Practices Act Water Protection Rules: Riparian Management Areas and Protection Measures for Significant Wetlands
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Vol. Oregon Administrative Records
Issue_Identification: Chapter 629, Division 635 and 645
Publication_Information:
Publication_Place: Salem, OR
Publisher: Oregon Department of Forestry
Methodology_Citation:
Citation_Information:
Originator: Reiter, Maryanne
Originator: Johnson, Sherri L.
Originator: Homyack, Jessica
Originator: Jones, Jay E.
Originator: James, Peter L.
Publication_Date: 2020
Title:
Summer stream temperature changes following forest harvest in the headwaters of the Trask River watershed, Oregon Coast Range
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Ecohydrology
Issue_Identification: 13(3): e2178
Online_Linkage: https://doi.org/10.1002/eco.2178
Methodology:
Methodology_Type: Field
Methodology_Description:
SAMPLING

Sample sites were comprised of both small headwater streams (first order) and the downstream locales (third order) on the major tributaries. All sites were sampled annually in early summer; downstream sites were also sampled in late summer. Spring sampling of all sites was attempted, but often limited due to access constraints such as snow, flooding or treefall. (Early summer sampling occurred concurrently with other studies focused on macroinvertebrates and organic material standing stocks.)

Sample reach lengths were 30 meters (m) for headwater streams and 50-100 m for larger systems and downstream sites. At each site, sample collection locales were determined from a randomization process. All samples were collected from riffles or cascades due to the rarity of pools in headwater systems and the difficulty of sampling deep, bedrock-dominated pools in larger streams. For each replicate, a known area of rock was scrubbed with a small wire brush and scrubbings rinsed into a container. For each replicate, a minimum of 4 rocks were sampled and the area that was scrubbed totaled. Four replicates were taken from each headwater stream and 6 from the downstream sites. Samples were immediately placed in the dark on ice, and frozen within 36 hours of collection.
Methodology:
Methodology_Type: Lab
Methodology_Description:
SAMPLE ANALYSIS

All sample analysis took place within one month of collection. Samples were thawed in the dark. Each sample was split into a biomass and a pigment aliquot. Biomass subsamples were filtered on to pre-weighed GF/F filters, dried at 70 °C for at least 48 hours, reweighed, combusted at 500 °C for 4 hours and then weighed again. The pigment subsamples were filtered onto GF/F filters, and immediately extracted using the hot ethanol methodology as described by Sartory and Grobblaar (1984). After 24 hours incubation chilled and in the dark, samples were centrifuged and read on a UV-Visible spectrophotometer. Samples were acidified to 0.003 molar in the cuvette, and the post-acidification readings taken 90 seconds later.

Calculations of dry mass (DM) and ash-free dry mass (AFDM) were made as per standard methods outlined by Steinman et al. (2007, in Hauer and Lamberti). Calculation of chlorophyll a and phaeophytin based on Sartory and Grobblaar (1984) as modified for LINX II methods (2004 unpublished; Mulholland 2015 or https://andrewsforest.oregonstate.edu/sites/default/files/lter/data/studies/an006/linxii_stream15n_exp_protocols_rev5.pdf). A re-analysis of this methodology by Parker et. al. (2016) suggested chlorophyll a concentrations should be corrected for acid strength and post-acidification time. Data are provided for both the original chlorophyll a determination and the Parker et. al. (2016) correction.
Methodology_Citation:
Citation_Information:
Originator: Sartory, D. P.
Originator: Grobbelaar, J. U.
Publication_Date: 1984
Title:
Extraction of chlorophyll a from freshwater phytoplankton for spectrophotometric analysis
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Hydrobiologia
Issue_Identification: 114(3): 177-187
Online_Linkage: https://doi.org/10.1007/BF00031869
Methodology_Citation:
Citation_Information:
Originator: Steinman, Alan D.
Originator: Lamberti, Gary A.
Originator: Leavitt, Peter R.
Publication_Date: 2007
Title:
Chapter 17: Biomass and pigments of benthic algae
Edition: 2nd Edition
Geospatial_Data_Presentation_Form: book chapter
Other_Citation_Details:
pp 357-379
Larger_Work_Citation:
Citation_Information:
Originator: Hauer, F. R. (ed.)
Originator: Lamberti, G. (ed.)
Publication_Date: 2007
Title:
Methods in stream ecology
Geospatial_Data_Presentation_Form: book chapter
Publication_Information:
Publisher: Academic Press
Other_Citation_Details:
ISBN: 978-0-12-332908-0
Online_Linkage: https://doi.org/10.1016/B978-0-12-332908-0.X5001-3
Methodology_Citation:
Citation_Information:
Originator: Mulholland, Patrick J.
Publication_Date: 2015
Title:
Lotic Intersite Nitrogen eXperiment II (LINX II): a cross-site study of the effects of anthropogenic land use change on nitrate uptake and retention in 72 streams across 8 different biomes (2003 – 2006)
Edition: ver 3
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publisher: Environmental Data Initiative
Online_Linkage: https://doi.org/10.6073/pasta/eac34b6c1cfb0268dd76ef68a7a90bfc
Methodology_Citation:
Citation_Information:
Originator: Parker, Samuel P.
Originator: Bowden, William B.
Originator: Flinn, Michael B.
Publication_Date: 2016
Title:
The effect of acid strength and postacidification reaction time on the determination of chlorophyll a in ethanol extracts of aquatic periphyton
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Limnology and Oceanography: Methods
Issue_Identification: 14(12): 839-852
Online_Linkage: https://doi.org/10.1002/lom3.10130
Process_Step:
Process_Description:
see methodology section
Process_Date: Unknown
Back to Top
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Below you will find a list and detailed description of the files included in this data publication.

DATA FILES (1)

1. \Data\Trask_Algae_data.csv: Comma-separated values (CSV) file containing collected data from basin-wide surveys of epilithic benthic communities as part of the larger Trask River Watershed Study. These data contain seasonal periphyton biomass and chlorophyll a concentrations (periphyton pigment abundance).

Variables include:

Site_name = Sample location site code (see \Supplements\Trask_Place_WS_characteristics.csv for information on each site)

Reach = Length of sampling reach (meters [m])

Date = Sample date (d-Mon-yy)

Replicate = Sample replicate

Habitat = Channel unit habitat type
BW = Backwater
C = Cascade
F = Falls
I = Riffle
IP = Isolated Pool
P = Pool
PI = Pool/riffle interface (usually pool tailout)
R = Rapid

Substrate1 = Primary substrate sampled
BK = Bedrock
BL = Large Boulder (> 1 m diameter)
BS = Small Boulder (25.6 - 100 centimeters [cm])
CB = Cobble (baseball to bowling ball, 64-256 millimeters [mm])
G = Gravel (pea-baseball diameter, 2-64 mm)
SA = Sand
SI = Silt; may consist of combination of clays and fine organics

Substrate2 = Secondary substrate sampled (categories are same as those defined for Substrate1 above)

Stream_Distance = Distance upstream from monumented origin of the study reach that the sample was collected, if known (m)

Area = Area sampled for each replicate (square centimeters [cm²])

Phaeo = Phaeophytin concentration (milligrams per square meter [mg/m²])

Chla = Chlorophyll a concentration (mg/m²)

Chla_corr = Chlorophyll a concentration, corrected per Parker et al. (2016) (mg/m²)

DM = Dry mass (grams per square meter [g/m²])

AFDM = Ash-free dry mass (g/m²)

Comments = Notes from field or from laboratory analyses


SUPPLEMENTAL FILES (6)

1. \Supplements\Trask_Characteristics_2020.pdf: Portable Document Format (PDF) file containing geologic, harvest, and tree cover information about the watersheds included in the Trask River Watershed study.

2. \Supplements\Trask_Contextual_analysis_V1_2007.pdf: PDF file containing a contextual analysis and brief portraits of various aspects of the Trask River study area.

3. \Supplements\Trask_Geology_geomorph_Contextual_Analysis_V2_2011.pdf: PDF file containing a description and discussion of the geology and geomorphology of the Trask River Watershed study area.

4. \Supplements\Trask_Place_WS_characteristics.csv: CSV file containing water monitoring station information.

Variables include:
Site_Name = Abbreviation of the site
Site_Description = Description of site
Site_Type = Type of study site, including stream gage, flume (and flume size in inches) or sampling reach, grouped as habitat reach
Latitude = Station latitude in decimal degrees
Longitude = Station longitude in decimal degrees
Elevation_m = Station elevation in meters above sea level
Watershed = Name of watershed the station is located within
WY 2007 - WY 2016 = Years of data collection ('X' is marked if data collected for that year)

5. \Supplements\Trask_Research_studyplan_2008.pdf: PDF file containing study background, objectives, design, and other study specifics for the Trask River Watershed Study.

6. \Supplements\Trask_Watersheds_maps_photos.pdf: PDF file containing maps of the Trask River Watershed study area and Trask River headwater watersheds.
Entity_and_Attribute_Detail_Citation:
Parker, Samuel P.; Bowden, William B.; Flinn, Michael B. 2016. The effect of acid strength and postacidification reaction time on the determination of chlorophyll a in ethanol extracts of aquatic periphyton. Limnology and Oceanography: Methods 14(12): 839-852. https://doi.org/10.1002/lom3.10130
Back to Top
Distribution_Information:
Distributor:
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 September 2022. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Resource_Description: RDS-2022-0001
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: see Format Specification
Format_Specification:
Comma-separated values (CSV) file
File_Decompression_Technique: Files zipped with 7-Zip 19.0
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/RDS-2022-0001
Digital_Form:
Digital_Transfer_Information:
Format_Name: PDF
Format_Version_Number: see Format Specification
Format_Specification:
Portable Document Format (PDF) file
File_Decompression_Technique: Files zipped with 7-Zip 19.0
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/RDS-2022-0001
Fees: None
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20220914
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Sherri L. Johnson
Contact_Organization: USDA Forest Service, Pacific Northwest Research Station
Contact_Position: Principal Investigator
Contact_Address:
Address_Type: mailing and physical
Address: 3200 SW Jefferson Way
City: Corvallis
State_or_Province: OR
Postal_Code: 97331
Country: USA
Contact_Voice_Telephone: 541-758-7771
Contact_Electronic_Mail_Address: sherri.johnson2@usda.gov; sherrijohnson717@comcast.net
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
Back to Top