Document Detail

A review of extinction in experimental populations.
MedLine Citation:
PMID:  18557955     Owner:  NLM     Status:  MEDLINE    
1. Population extinction is a fundamental ecological process. Recent experimental work has begun to test the large body of theory that predicts how demographic, genetic and environmental factors influence extinction risk. We review empirical studies of extinction conducted under controlled laboratory conditions. Our synthesis highlights four findings. First, extinction theory largely considers individual, isolated populations. However, species interactions frequently altered or even reversed the influence of environmental factors on population extinction as compared to single-species conditions, highlighting the need to integrate community ecology into population theory. 2. While most single-species studies qualitatively agree with theoretical predictions, studies are needed that quantitatively compare observed and predicted extinction rates. A quantitative understanding of extinction processes is needed to further advance theory and to predict population extinction resulting from human activities. 3. Many stresses leading to population extinction can be assuaged by migration between subpopulations. However, too much migration increases synchrony between subpopulations and thus increases extinction risk. Research is needed to determine how to strike a balance that maximizes the benefit of migration. 4. Results from laboratory experiments often conflict with field studies. Understanding these inconsistencies is crucial for extending extinction theory to natural populations.
Blaine D Griffen; John M Drake
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Publication Detail:
Type:  Journal Article; Review     Date:  2008-06-12
Journal Detail:
Title:  The Journal of animal ecology     Volume:  77     ISSN:  1365-2656     ISO Abbreviation:  J Anim Ecol     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2009-01-23     Completed Date:  2009-03-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376574     Medline TA:  J Anim Ecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1274-87     Citation Subset:  IM    
Odum School of Ecology, University of Georgia, Athens, GA 30602-2202, USA.
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MeSH Terms
Extinction, Biological*
Population Dynamics

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