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A Comparison of Several Techniques For Estimating The Average Volume Per Acre For Multipanel Data With Missing Panels

As Forest Inventory and Analysis changes from a periodic survey to a multipanel annual survey, a transition will occur where only some of the panels have been resurveyed. Several estimation techniques use data from the periodic survey in addition to the data from the partially completed multipanel data. These estimation techniques were compared using data from two...

https://www.fs.usda.gov/treesearch/search?keywords=%22estimation%22&%3Bamp%3Bf%5B0%5D=author_facet%3A%22Miller%2C%20Ina%20Sue%22&%3Bpage=4&f%5B0%5D=author_facet%3A%22Pierson%2C%20Derek%22&f%5B1%5D=author_facet%3A%22Bytnerowicz%2C%20Andrzej%22&f%5B2%5D=author_facet%3A%22Matthews%2C%20Stephen%22&f%5B3%5D=author_facet%3A%22Moran%2C%20Matt%22&f%5B4%5D=author_facet%3A%22Frank%2C%20John%22&f%5B5%5D=author_facet%3A%22Johnsen%2C%20Kurt%22&f%5B6%5D=author_facet%3A%22Gartner%2C%20Dave%22

Author(s):

Dave Gartner; Gregory A. Reams

Year:

2001

Keywords:

Source:

In: Reams, Gregory A.; McRoberts, Ronald E.; Van Deusen, Paul C., eds. 2001. Proceedings of the second annual Forest Inventory and Analysis symposium; 2000 October 17-18; Salt Lake City, UT. Gen. Tech. Rep. SRS-47. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 76-81

Forest ecosystem respiration estimated from eddy covariance and chamber measurements under high turbulence and substantial tree mortality from bark beetles

Eddy covariance nighttime fluxes are uncertain due to potential measurement biases. Many studies report eddy covariance nighttime flux lower than flux from extrapolated chamber measurements, despite corrections for low turbulence. We compared eddy covariance and chamber estimates of ecosystem respiration at the GLEES Ameriflux site over seven growing seasons under high...

Author(s):

Heather N. Speckman; John M. Frank; John B. Bradford; Brianna L. Miles; William J. Massman; William J. Parton; Michael G. Ryan

Year:

2015

Keywords:

bark beetles, chambers, disturbance, EC, ecosystem respiration, respiration modeling, soil efflux, turbulence, u* filtering

Source:

Global Change Biology. 2: 708-721.

Monthly leaf area index estimates from point-in-time measurements and needle phenology for Pinus taeda

Abstract: Leaf area index (LAI) of loblolly pine (Pinus taeda L.) trees of the southern United States varies almost twofold interannually; loblolly pine, essentially, carries two foliage cohorts at peak LAI (September) and one at minimum (March?April). Herein, we present an approach that may be site invariant to estimate monthly...

Author(s):

D.A. Sampson; T.J. Albaugh; Kurt H. Johnsen; H.L. Allen; Stanley J. Zarnoch

Year:

2003

Keywords:

Source:

Can. J. For. Res. 33: 2477–2490

An empirical inferential method of estimating nitrogen deposition to Mediterranean-type ecosystems: the San Bernardino Mountains case study

The empirical inferential method (EIM) allows for spatially and temporally-dense estimates of atmospheric nitrogen (N) deposition to Mediterranean ecosystems. This method, set within a GIS platform, is based on ambient concentrations of NH₃, NO, NO₂ and HNO₃; surface conductance of NH₄

Author(s):

A. Bytnerowicz; R.F. Johnson; L. Zhang; G.D. Jenerette; M.E. Fenn; S.L. Schilling; I. Gonzalez-Fernandez

Year:

2015

Keywords:

Source:

Environmental Pollution. 203: 69-88

Joining empirical and modelling approaches to estimate dry deposition of nitrogen in Mediterranean forests

In Mediterranean areas, dry deposition is a major component of the total atmospheric N input to natural habitats, particularly to forest ecosystems. An innovative approach, combining the empirical inferential method (EIM) for surface deposition of NO₃^- and NH₄⁺ with stomatal...

Author(s):

Héctor García-Gómez; Sheila Izquieta-Rojano; Laura Aguillaume; Ignacio González-Fernández; Fernando Valiño; David Elustondo; Jesús M. Santamaría; Anna Àvila; Andrzej Bytnerowicz; Victoria Bermejo; Rocío Alonso

Year:

2018

Keywords:

Stomatal conductance model, Inferential method, Spain, Broadleaf evergreen, Quercus ilex

Source:

Environmental Pollution. 243: 427-436

GPP in Loblolly Pine: A Monthly Comparison of Empirical and Process Models

Monthly and yearly gross primary productivity (GPP) estimates derived from an empirical and two process based models (3PG and BIOMASS) were compared. Spatial and temporal variation in foliar gas photosynthesis was examined and used to develop GPP prediction models for fertilized nine-year-old loblolly pine (Pinus taeda) stands located in the North...

Author(s):

Christopher Gough; John Seiler; Kurt Johnsen; David Arthur Sampson

Year:

2002

Keywords:

Source:

Gen. Tech. Rep. SRS–48. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 66-71

Estimating maximum mean canopy stomatal conductance for use in models

Fertilized (F) and irrigated and fertilized (IF) stands of Pinus taeda L. produced twice the leaf area index of irrigated (I) and control (C) stands. Based on sap flux-scaled mean stomatal conductance (G_S), we found that stomatal conductance in F was half that in other treatments. During the growing season, GS was related to...

Author(s):

Brent E. Ewers; Ram Oren; Kurt H. Johnsen; J.J Landsberg

Year:

2001

Keywords:

Source:

Can. J. For. Res. 31: 198207 (2001)

Soil properties differently influence estimates of soil CO₂ efflux from three chamber-based measurement systems

Soil C0₂ efflux is a major component of net ecosystem productivity (NEP) of forest systems. Combining data from multiple researchers for larger-scale modeling and assessment will only be valid if their methodologies provide directly comparable results. We conducted a series of laboratory and field tests to assess the presence and magnitude of...

Author(s):

John R. Butnor; Kurt H. Johnsen; Chris A. Maier

Year:

2005

Keywords:

Calibration, CO2 efflux, diffusivity, porosity, soil CO2 efflux, soil respiration

Source:

Biogeochemistry 73: 283-301

Surface-based GPR underestimates below-stump root biomass

Aims While lateral root mass is readily detectable with ground penetrating radar (GPR), the roots beneath a tree (below-stump) and overlapping lateral roots near large trees are problematic for surface-based antennas operated in reflection mode. We sought to determine if tree size (DBH) effects GPR root detection proximal to longleaf pine (Pinus palustris Mill) and if...

Author(s):

John R. Butnor; Lisa J. Samuelson; Thomas A. Stokes; Kurt H. Johnsen; Peter H. Anderson; Carlos A. Gonzalez-Benecke

Year:

2016

Keywords:

GPR . Root mass, taproot . Lateral root . Below-stump . Pinus palustris . Longleaf pine

Source:

Plant and Soil

Utility of Ground-Penetrating Radar as a Root Biomass Survey Tool in Forest Systems

Traditional methods of measuring tree root biomass are labor intensive and destructive in nature. We studied the utility of ground-penetrating radar (GPR) to measure tree root biomass in situ within a replicated, intensive culture forestry experiment planted with loblolly pine (Pinus taeda L.). The study site was located in Decatur County, Georgia,...

Author(s):

John R. Butnor; J.A. Doolittle; Kurt H. Johnsen; L. Samuelson; T. Stokes; L. Kress

Year:

2003

Keywords:

Source:

Soil Science Society of America Journal 67:1607–1615

Carbon Sequestration in loblolly pine plantations: Methods, limitations, and research needs for estimating storage pools

Globally, the species most widely used for plantation forestry is loblolly pine (Pinus taeda L.). Because loblolly pine plantations are so extensive and grow so rapidly, they provide a great potential for sequestering atmospheric carbon (C). Because loblolly pine plantations are relatively simple ecosystems and because such a great volume of...

Author(s):

Kurt Johnsen; Bob Teskey; Lisa Samuelson; John Butnor; David Sampson; Felipe Sanchez; Chris Maier; Steve McKeand

Year: