Document Detail


Species' range: adaptation in space and time.
MedLine Citation:
PMID:  19788353     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Populations living in a spatially and temporally changing environment can adapt to the changing optimum and/or migrate toward favorable habitats. Here we extend previous analyses with a static optimum to allow the environment to vary in time as well as in space. The model follows both population dynamics and the trait mean under stabilizing selection, and the outcomes can be understood by comparing the loads due to genetic variance, dispersal, and temporal change. With fixed genetic variance, we obtain two regimes: (1) adaptation that is uniform along the environmental gradient and that responds to the moving optimum as expected for panmictic populations and when the spatial gradient is sufficiently steep, and (2) a population with limited range that adapts more slowly than the environmental optimum changes in both time and space; the population therefore becomes locally extinct and migrates toward suitable habitat. We also use a population-genetic model with many loci to allow genetic variance to evolve, and we show that the only solution now has uniform adaptation.
Authors:
Jitka Polechová; Nick Barton; Glenn Marion
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American naturalist     Volume:  174     ISSN:  1537-5323     ISO Abbreviation:  Am. Nat.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-10-09     Completed Date:  2009-12-15     Revised Date:  2011-05-19    
Medline Journal Info:
Nlm Unique ID:  2984688R     Medline TA:  Am Nat     Country:  United States    
Other Details:
Languages:  eng     Pagination:  E186-204     Citation Subset:  IM    
Affiliation:
Biomathematics and Statistics Scotland, James Clerk Maxwell Building, King's Buildings, Edinburgh EH9 3JZ, Scotland, United Kingdom. jitka.polechova@ist.ac.at
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological
Animal Migration
Animals
Gene Flow
Homing Behavior*
Models, Biological
Population Density
Population Dynamics
Selection, Genetic
Species Specificity
Time Factors
Grant Support
ID/Acronym/Agency:
GM56693/GM/NIGMS NIH HHS
Comments/Corrections
Erratum In:
Am Nat. 2011 Apr;177(4):546-7   [PMID:  21460576 ]

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


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