Publication Date:
2001-04-03
Description:
By advancing spring leaf flush and ensuing food availability, climatic warming results in a mismatch between the timing of peak food supply and nestling demand, shifting the optimal time for reproduction in birds. Two populations of blue tits (Parus caeruleus) that breed at different dates in similar, but spatially distinct, habitat types in Corsica and southern France provide a unique opportunity to quantify the energetic and fitness consequences when breeding is mismatched with local productivity. As food supply and demand become progressively mismatched, the increased cost of rearing young pushes the metabolic effort of adults beyond their apparent sustainable limit, drastically reducing the persistence of adults in the breeding population. We provide evidence that the economics of parental foraging and limits to sustainable metabolic effort are key selective forces underlying synchronized seasonal breeding and long-term shifts in breeding date in response to climatic change.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, D W -- Blondel, J -- Perret, P -- Lambrechts, M M -- Speakman, J R -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2598-600.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Groupe de Recherche en Ecologie, Nutrition et Energetique, Departement de Biologie, Universite de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada. d.thomas@courrier.usherb.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11283370" target="_blank"〉PubMed〈/a〉
Keywords:
Adaptation, Physiological
;
Animals
;
Climate
;
*Energy Metabolism
;
Feeding Behavior
;
Female
;
*Food
;
France
;
Male
;
*Nesting Behavior
;
*Reproduction
;
Seasons
;
Songbirds/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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