Document Detail


King penguin population threatened by Southern Ocean warming.
MedLine Citation:
PMID:  18268328     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Seabirds are sensitive indicators of changes in marine ecosystems and might integrate and/or amplify the effects of climate forcing on lower levels in food chains. Current knowledge on the impact of climate changes on penguins is primarily based on Antarctic birds identified by using flipper bands. Although flipper bands have helped to answer many questions about penguin biology, they were shown in some penguin species to have a detrimental effect. Here, we present for a Subantarctic species, king penguin (Aptenodytes patagonicus), reliable results on the effect of climate on survival and breeding based on unbanded birds but instead marked by subcutaneous electronic tags. We show that warm events negatively affect both breeding success and adult survival of this seabird. However, the observed effect is complex because it affects penguins at several spatio/temporal levels. Breeding reveals an immediate response to forcing during warm phases of El Niño Southern Oscillation affecting food availability close to the colony. Conversely, adult survival decreases with a remote sea-surface temperature forcing (i.e., a 2-year lag warming taking place at the northern boundary of pack ice, their winter foraging place). We suggest that this time lag may be explained by the delay between the recruitment and abundance of their prey, adjusted to the particular 1-year breeding cycle of the king penguin. The derived population dynamic model suggests a 9% decline in adult survival for a 0.26 degrees C warming. Our findings suggest that king penguin populations are at heavy extinction risk under the current global warming predictions.
Authors:
Céline Le Bohec; Joël M Durant; Michel Gauthier-Clerc; Nils C Stenseth; Young-Hyang Park; Roger Pradel; David Grémillet; Jean-Paul Gendner; Yvon Le Maho
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-02-11
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  105     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-02-21     Completed Date:  2008-03-13     Revised Date:  2013-06-05    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2493-7     Citation Subset:  IM    
Affiliation:
Département d'Ecologie, Physiologie, et Ethologie, Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scientifique, Unite Mixte de Recherche 7178, Strasbourg, France.
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MeSH Terms
Descriptor/Qualifier:
Aging / physiology
Animals
Binomial Distribution
Greenhouse Effect*
Models, Biological
Oceans and Seas
Population Dynamics
Spheniscidae / physiology*
Temperature
Time Factors
Comments/Corrections
Comment In:
Proc Natl Acad Sci U S A. 2008 Jul 1;105(26):E38; author eply E39   [PMID:  18579767 ]

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


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