Document Detail


Nutrient-limited food webs with up to three trophic levels: feasibility, stability, assembly rules, and effects of nutrient enrichment.
MedLine Citation:
PMID:  16257027     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Community structure is controlled, among multiple factors, by competition and predation. Using the R* rule and graphical analysis, we analyse here the feasibility, stability and assembly rules of resource-based food webs with up to three trophic levels. In particular, we show that (1) the stability of a food web with two plants and two generalist herbivores does not require that plants' resource exploitation abilities trade-off with resistance to the two herbivores, and (2) food webs with two plants and either one generalist herbivore and a carnivore or two generalist herbivores and two generalist carnivores are not feasible because of cascade competition between top consumers. The relative strength of species interactions and the relative impacts of plants and herbivores on factors which control their growth also play a critical role. We discuss how community structure constrains assembly rules and yields cascades of extinctions in food webs.
Authors:
Florence D Hulot; Michel Loreau
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Publication Detail:
Type:  Journal Article     Date:  2005-10-27
Journal Detail:
Title:  Theoretical population biology     Volume:  69     ISSN:  0040-5809     ISO Abbreviation:  Theor Popul Biol     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2005-12-19     Completed Date:  2006-05-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0256422     Medline TA:  Theor Popul Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  48-66     Citation Subset:  IM    
Affiliation:
Laboratoire d'Ecologie, UMR 7625, Ecole Normale Supérieure, 46, rue d'Ulm, 75230 Paris cedex 05, France. florence.hulot@ens.fr
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MeSH Terms
Descriptor/Qualifier:
Animals
Ecosystem*
Feeding Behavior
Food Chain*
Models, Biological*
Models, Theoretical
Plants

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


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