Document Detail


Could increased boreal forest ecosystem productivity offset carbon losses from increased disturbances?
MedLine Citation:
PMID:  18029308     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To understand how boreal forest carbon (C) dynamics might respond to anticipated climatic changes, we must consider two important processes. First, projected climatic changes are expected to increase the frequency of fire and other natural disturbances that would change the forest age-class structure and reduce forest C stocks at the landscape level. Second, global change may result in increased net primary production (NPP). Could higher NPP offset anticipated C losses resulting from increased disturbances? We used the Carbon Budget Model of the Canadian Forest Sector to simulate rate changes in disturbance, growth and decomposition on a hypothetical boreal forest landscape and to explore the impacts of these changes on landscape-level forest C budgets. We found that significant increases in net ecosystem production (NEP) would be required to balance C losses from increased natural disturbance rates. Moreover, increases in NEP would have to be sustained over several decades and be widespread across the landscape. Increased NEP can only be realized when NPP is enhanced relative to heterotrophic respiration. This study indicates that boreal forest C stocks may decline as a result of climate change because it would be difficult for enhanced growth to offset C losses resulting from anticipated increases in disturbances.
Authors:
Werner A Kurz; Graham Stinson; Greg Rampley
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  363     ISSN:  0962-8436     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-05-28     Completed Date:  2008-09-03     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2261-9     Citation Subset:  IM    
Affiliation:
Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, British Columbia, Canada V8Z 1M5. wkurz@nrcan.gc.ca
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MeSH Terms
Descriptor/Qualifier:
Biomass
Carbon / metabolism*
Disasters
Ecosystem*
Fires
Greenhouse Effect*
Models, Theoretical*
Trees / growth & development*,  metabolism*
Chemical
Reg. No./Substance:
7440-44-0/Carbon
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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