Population trends of penguins in the French Southern Territories

Penguins are important top consumers in marine food webs and are one of the most threatened bird families, especially by climate change and food web alterations by marine fisheries. Yet, long-term population trends are lacking or are uncertain for many populations. Seven species of penguins breeding...

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Veröffentlicht in:Polar biology Jg. 43; H. 7; S. 835 - 850
Hauptverfasser: Barbraud, Christophe, Delord, Karine, Bost, Charles A., Chaigne, Adrien, Marteau, Cédric, Weimerskirch, Henri
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2020
Springer
Springer Nature B.V
Springer Verlag
Schlagworte:
Advertising executives
Archipelagoes
Biomedical and Life Sciences
Birds
Breeding
Breeding sites
Climate change
Colonies
Colonies & territories
Ecology
Emperor penguin
Environmental Sciences
Fish populations
Food chains
Food chains (Ecology)
Food webs
Global temperature changes
Life Sciences
Marine fish
Marine fisheries
Microbiology
Oceanography
Original Paper
Plant Sciences
Populations
Seabirds
Threatened species
Trends
Wildlife conservation
Zoology
French Southern Territories
Amsterdam
Crozet
Terre Adélie/Adelie Land
Density dependence
Kerguelen
Saint-Paul
Monitoring
ISSN:0722-4060, 1432-2056
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Beschreibung
Zusammenfassung:Penguins are important top consumers in marine food webs and are one of the most threatened bird families, especially by climate change and food web alterations by marine fisheries. Yet, long-term population trends are lacking or are uncertain for many populations. Seven species of penguins breeding at the French Southern Territories in the southern Indian Ocean on the Crozet, Kerguelen, Saint-Paul–Amsterdam archipelagos and in Terre Adélie/Adelie Land, Antarctica are monitored regularly. This monitoring started in the early 1950s and most populations have been surveyed during the past four years, allowing assessments of population trends. King penguins increased at nearly all breeding sites within the Crozet and Kerguelen archipelagos. Emperor penguins have decreased at Terre Adélie/Adelie Land, with a partial recovery of the colony during the 2010s. Gentoo penguin populations at Crozet and Kerguelen are highly variable but stable. Adélie penguins have been increasing in Terre Adélie/Adelie Land. The trends in eastern rockhopper penguins vary between colonies and archipelagos. Northern rockhopper penguins have continuously decreased in numbers at Amsterdam Island, but appear to have increased at the nearby Saint-Paul Island. Macaroni penguins have first increased and then stabilized since the 2000s at Kerguelen and are stable at the Crozet Islands. Overall, most penguin populations breeding in the French Southern Territories increased or were stable over the past 30–60 years, with the exception of the northern rockhopper penguin, king and gentoo penguins on Crozet and the emperor penguin. The ecological reasons for these trends are poorly understood and require further investigation.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0722-4060
1432-2056
DOI:10.1007/s00300-020-02691-6