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Net ecosystem productivity of temperate and boreal forests after clearcutting a Fluxnet-Canada measurement and modelling synthesis

Abstract

Clearcutting strongly affects subsequent forest net ecosystem productivity (NEP). Hypotheses for ecological controls on NEP in the ecosystem model ecosys were tested with CO{sub 2} fluxes measured by eddy covariance (EC) in three post clearcut conifer chronosequences in different ecological zones across Canada. In the model, microbial colonization of postharvest fine and woody debris drove heterotrophic respiration (Rh), and hence decomposition, microbial growth, N mineralization and asymbiotic N{sub 2} fixation. These processes controlled root N uptake, and thereby CO{sub 2} fixation in regrowing vegetation. Interactions among soil and plant processes allowed the model to simulate hourly CO{sub 2} fluxes and annual NEP within the uncertainty of EC measurements from 2003 to 2007 over forest stands from 1 to 80 yr of age in all three chronosequences without site- or species-specific parameterization. The model was then used to study the impacts of increasing harvest removals on subsequent C stocks at one of the chronosequence sites. Model results indicated that increasing harvest removals would hasten recovery of NEP during the first 30 yr after clearcutting, but would reduce ecosystem C stocks by about 15% of the increased removals at the end of an 80-yr harvest cycle
Authors:
Grant, R. F. (Dept. of Renewable Resources, Univ. of Alberta, Edmonton, (Canada)), e-mail: robert.grant@ales.ualberta.ca; Barr, A G; [1]  Black, T A; [2]  Margolis, H A; [3]  McCaughey, J H; [4]  Trofymow, J A [5] 
  1. Climate Research Branch, Meteorological Service of Canada, Saskatoon (Canada)
  2. Faculty of Land and Food Systems, Univ. of British Columbia, Vancouver BC, (Canada)
  3. Faculte de Foresterie et de Geomatique, Pavillon Abitibi-Price, Universite Laval, Quebec (Canada)
  4. Dept. of Geography, Queen's Univ., Kingston (Canada)
  5. Canadian Forest Service, Pacific Forestry Centre, Victoria (Canada)
Publication Date:
Nov 15, 2010
Product Type:
Journal Article
Resource Relation:
Journal Name: Tellus, Series B: Chemical and Physical Meteorology; Journal Volume: 62B; Journal Issue: 5; Conference: ICDC8: 8. international carbon dioxide conference, Jena (Germany), 09/13/2009--09/19/2009; Other Information: Conference Literature; 68 refs., 10 figs., 5 tabs.; 10.1111/J.1600-0889.2010.00500.X
Subject:
54 ENVIRONMENTAL SCIENCES; CUTTING; FORESTRY; NITROGEN; CARBON DIOXIDE; ECOSYSTEMS; HARVESTING
OSTI ID:
1010805
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0280-6509; TRN: SE1107073
Availability:
Available from DOI: http://dx.doi.org/10.1111/j.1600-0889.2010.00500.x
Submitting Site:
SWD
Size:
page(s) 475-496
Announcement Date:
Apr 11, 2011

Citation Formats

Grant, R. F. (Dept. of Renewable Resources, Univ. of Alberta, Edmonton, (Canada)), e-mail: robert.grant@ales.ualberta.ca, Barr, A G, Black, T A, Margolis, H A, McCaughey, J H, and Trofymow, J A. Net ecosystem productivity of temperate and boreal forests after clearcutting a Fluxnet-Canada measurement and modelling synthesis. Sweden: N. p., 2010. Web. doi:10.1111/J.1600-0889.2010.00500.X.
Grant, R. F. (Dept. of Renewable Resources, Univ. of Alberta, Edmonton, (Canada)), e-mail: robert.grant@ales.ualberta.ca, Barr, A G, Black, T A, Margolis, H A, McCaughey, J H, & Trofymow, J A. Net ecosystem productivity of temperate and boreal forests after clearcutting a Fluxnet-Canada measurement and modelling synthesis. Sweden. doi:10.1111/J.1600-0889.2010.00500.X.
Grant, R. F. (Dept. of Renewable Resources, Univ. of Alberta, Edmonton, (Canada)), e-mail: robert.grant@ales.ualberta.ca, Barr, A G, Black, T A, Margolis, H A, McCaughey, J H, and Trofymow, J A. 2010. "Net ecosystem productivity of temperate and boreal forests after clearcutting a Fluxnet-Canada measurement and modelling synthesis." Sweden. doi:10.1111/J.1600-0889.2010.00500.X. https://www.osti.gov/servlets/purl/10.1111/J.1600-0889.2010.00500.X.
@misc{etde_1010805,
title = {Net ecosystem productivity of temperate and boreal forests after clearcutting a Fluxnet-Canada measurement and modelling synthesis}
author = {Grant, R. F. (Dept. of Renewable Resources, Univ. of Alberta, Edmonton, (Canada)), e-mail: robert.grant@ales.ualberta.ca, Barr, A G, Black, T A, Margolis, H A, McCaughey, J H, and Trofymow, J A}
abstractNote = {Clearcutting strongly affects subsequent forest net ecosystem productivity (NEP). Hypotheses for ecological controls on NEP in the ecosystem model ecosys were tested with CO{sub 2} fluxes measured by eddy covariance (EC) in three post clearcut conifer chronosequences in different ecological zones across Canada. In the model, microbial colonization of postharvest fine and woody debris drove heterotrophic respiration (Rh), and hence decomposition, microbial growth, N mineralization and asymbiotic N{sub 2} fixation. These processes controlled root N uptake, and thereby CO{sub 2} fixation in regrowing vegetation. Interactions among soil and plant processes allowed the model to simulate hourly CO{sub 2} fluxes and annual NEP within the uncertainty of EC measurements from 2003 to 2007 over forest stands from 1 to 80 yr of age in all three chronosequences without site- or species-specific parameterization. The model was then used to study the impacts of increasing harvest removals on subsequent C stocks at one of the chronosequence sites. Model results indicated that increasing harvest removals would hasten recovery of NEP during the first 30 yr after clearcutting, but would reduce ecosystem C stocks by about 15% of the increased removals at the end of an 80-yr harvest cycle}
doi = {10.1111/J.1600-0889.2010.00500.X}
journal = {Tellus, Series B: Chemical and Physical Meteorology}
issue = {5}
volume = {62B}
place = {Sweden}
year = {2010}
month = {Nov}
}