Document Detail


The dynamics of food chains under climate change and nutrient enrichment.
MedLine Citation:
PMID:  23007081     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Warming has profound effects on biological rates such as metabolism, growth, feeding and death of organisms, eventually affecting their ability to survive. Using a nonlinear bioenergetic population-dynamic model that accounts for temperature and body-mass dependencies of biological rates, we analysed the individual and interactive effects of increasing temperature and nutrient enrichment on the dynamics of a three-species food chain. At low temperatures, warming counteracts the destabilizing effects of enrichment by both bottom-up (via the carrying capacity) and top-down (via biological rates) mechanisms. Together with increasing consumer body masses, warming increases the system tolerance to fertilization. Simultaneously, warming increases the risk of starvation for large species in low-fertility systems. This effect can be counteracted by increased fertilization. In combination, therefore, two main drivers of global change and biodiversity loss can have positive and negative effects on food chain stability. Our model incorporates the most recent empirical data and may thus be used as the basis for more complex forecasting models incorporating food-web structure.
Authors:
Amrei Binzer; Christian Guill; Ulrich Brose; Björn C Rall
Publication Detail:
Type:  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:  367     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-09-25     Completed Date:  2013-04-03     Revised Date:  2013-11-06    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2935-44     Citation Subset:  IM    
Affiliation:
J. F. Blumenbach Institute of Zoology and Anthropology, Georg-August University Göttingen, Göttingen, Germany. abinzer@uni-goettingen.de
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MeSH Terms
Descriptor/Qualifier:
Animals
Biodiversity
Biomass
Biota
Body Size
Body Weight
Climate Change*
Energy Metabolism
Extinction, Biological
Fertilization
Food*
Food Chain*
Population Dynamics
Starvation / metabolism
Temperature
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