GrantBarrBlackEtAl2010

Reference

Grant, R.F., 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 FluxnetCanada measurement and modelling synthesis. Tellus, Series B: Chemical and Physical Meteorology, 62(5):475-496. (Scopus )

Abstract

Clearcutting strongly affects subsequent forest net ecosystem productivity (NEP). Hypotheses for ecological controls on NEP in the ecosystem model ecosys were tested with CO2 fluxes measured by eddy covariance (EC) in three postclearcut 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 N2 fixation. These processes controlled root N uptake, and thereby CO2 fixation in regrowing vegetation. Interactions among soil and plant processes allowed the model to simulate hourly CO2 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 speciesspecific 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 80yr harvest cycle. © 2010 The Authors Tellus B © 2010 International Meteorological Institute in Stockholm.

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@ARTICLE { GrantBarrBlackEtAl2010,
    AUTHOR = { Grant, R.F. and Barr, A.G. and Black, T.A. and Margolis, H.A. and Mccaughey, J.H. and Trofymow, J.A. },
    TITLE = { Net ecosystem productivity of temperate and boreal forests after clearcutting-a FluxnetCanada measurement and modelling synthesis },
    JOURNAL = { Tellus, Series B: Chemical and Physical Meteorology },
    YEAR = { 2010 },
    VOLUME = { 62 },
    PAGES = { 475--496 },
    NUMBER = { 5 },
    ABSTRACT = { Clearcutting strongly affects subsequent forest net ecosystem productivity (NEP). Hypotheses for ecological controls on NEP in the ecosystem model ecosys were tested with CO2 fluxes measured by eddy covariance (EC) in three postclearcut 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 N2 fixation. These processes controlled root N uptake, and thereby CO2 fixation in regrowing vegetation. Interactions among soil and plant processes allowed the model to simulate hourly CO2 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 speciesspecific 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 80yr harvest cycle. © 2010 The Authors Tellus B © 2010 International Meteorological Institute in Stockholm. },
    COMMENT = { Cited By (since 1996): 1 Export Date: 27 April 2011 Source: Scopus doi: 10.1111/j.1600-0889.2010.00500.x },
    ISSN = { 02806509 (ISSN) },
    KEYWORDS = { boreal forest, carbon dioxide, carbon flux, carbon sink, chronosequence, clearcutting, colonization, ecological modeling, ecological zonation, ecosystem modeling, eddy covariance, heterotrophy, microbial community, net ecosystem production, nitrogen fixation, nutrient uptake, respiration, soil-vegetation interaction, temperate forest, timber harvesting, Canada, Coniferophyta },
    OWNER = { Luc },
    TIMESTAMP = { 2011.04.27 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-77958540615&partnerID=40&md5=05d2ffcdee2831599ae4424992feff3b },
}

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