Document Detail

Phenological response of sea turtles to environmental variation across a species' northern range.
MedLine Citation:
PMID:  23193130     Owner:  NLM     Status:  MEDLINE    
Variations in environmental parameters (e.g. temperature) that form part of global climate change have been associated with shifts in the timing of seasonal events for a broad range of organisms. Most studies evaluating such phenological shifts of individual taxa have focused on a limited number of locations, making it difficult to assess how such shifts vary regionally across a species range. Here, by using 1445 records of the date of first nesting for loggerhead sea turtles (Caretta caretta) at different breeding sites, on different continents and in different years across a broad latitudinal range (25-39° 'N), we demonstrate that the gradient of the relationship between temperature and the date of first breeding is steeper at higher latitudes, i.e. the phenological responses to temperature appear strongest at the poleward range limit. These findings support the hypothesis that biological changes in response to climate change will be most acute at the poleward range limits and are in accordance with the predictions of MacArthur's hypothesis that poleward range limit for species range is environmentally limited. Our findings imply that the poleward populations of loggerheads are more sensitive to climate variations and thus they might display the impacts of climate change sooner and more prominently.
Antonios D Mazaris; Athanasios S Kallimanis; John D Pantis; Graeme C Hays
Publication Detail:
Type:  Journal Article; Meta-Analysis; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  280     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2012-11-29     Completed Date:  2013-05-06     Revised Date:  2014-01-23    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  20122397     Citation Subset:  IM    
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MeSH Terms
Climate Change*
Linear Models
Mediterranean Region
Nesting Behavior / physiology*
Southeastern United States
Turtles / physiology*

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

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