Document Detail


Climate change impacts on body size and food web structure on mountain ecosystems.
MedLine Citation:
PMID:  23007094     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The current distribution of climatic conditions will be rearranged on the globe. To survive, species will have to keep pace with climates as they move. Mountains are among the most affected regions owing to both climate and land-use change. Here, we explore the effects of climate change in the vertebrate food web of the Pyrenees. We investigate elevation range expansions between two time-periods illustrative of warming conditions, to assess: (i) the taxonomic composition of range expanders; (ii) changes in food web properties such as the distribution of links per species and community size-structure; and (iii) what are the specific traits of range expanders that set them apart from the other species in the community-in particular, body mass, diet generalism, vulnerability and trophic position within the food web. We found an upward expansion of species at all elevations, which was not even for all taxonomic groups and trophic positions. At low and intermediate elevations, predator : prey mass ratios were significantly reduced. Expanders were larger, had fewer predators and were, in general, more specialists. Our study shows that elevation range expansions as climate warms have important and predictable impacts on the structure and size distribution of food webs across space.
Authors:
Miguel Lurgi; Bernat C López; José M Montoya
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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:  3050-7     Citation Subset:  IM    
Affiliation:
CREAF, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalunya, Spain.
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MeSH Terms
Descriptor/Qualifier:
Altitude
Animals
Body Size*
Body Weight
Climate Change*
Demography
Ecosystem*
Food Chain*
Predatory Behavior
Temperature
Vertebrates / physiology
Comments/Corrections

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