ArticleProceedings of the National Academy of Sciences of the United States of America2007
Abrupt recent shift in delta 13C and delta 15N values in Adélie penguin eggshell in Antarctica.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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22 citing papers in PubMed.
- Living with voracious roommates: Factors that explain isotopic niche variation in a mixed colony of insectivorous bats.Ecology and evolution · 2024Article
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- Demographic Reconstruction of Antarctic Fur Seals Supports the Krill Surplus Hypothesis.Genes · 2022Article
- Molecular Diet Analysis of Adélie Penguins (Biology · 2022Article
- A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times.Scientific reports · 2021Article
- Divergent trophic responses of sympatric penguin species to historic anthropogenic exploitation and recent climate change.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Cracking the egg: the use of modern and fossil eggs for ecological, environmental and biological interpretation.Royal Society open science · 2018Review
- Past penguin colony responses to explosive volcanism on the Antarctic Peninsula.Nature communications · 2017Article
- The temporal scale of diet and dietary proxies.Ecology and evolution · 2016Review
- Longer and less overlapping food webs in anthropogenically disturbed marine ecosystems: confirmations from the past.PloS one · 2014Article
- The future of the oceans past: towards a global marine historical research initiative.PloS one · 2014Article
- Carbon and nitrogen isotopes from top predator amino acids reveal rapidly shifting ocean biochemistry in the outer California Current.PloS one · 2014Article
- Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene.Scientific reports · 2013Article
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- Article
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- Variability in krill biomass links harvesting and climate warming to penguin population changes in Antarctica.Proceedings of the National Academy of Sciences of the United States of America · 2011Article
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- Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica).Oecologia · 2010Article
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2 authors.
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Abstract
Stable isotope values of carbon (delta13C) and nitrogen (delta15N) in blood, feathers, eggshell, and bone have been used in seabird studies since the 1980s, providing a valuable source of information on diet, foraging patterns, and migratory behavior in these birds. These techniques can also be applied to fossil material when preservation of bone and other tissues is sufficient. Excavations of abandoned Adélie penguin (Pygoscelis adeliae) colonies in Antarctica often provide well preserved remains of bone, feathers, and eggshell dating from hundreds to thousands of years B.P. Herein we present an approximately 38,000-year time series of delta13C and delta15N values of Adélie penguin eggshell from abandoned colonies located in three major regions of Antarctica. Results indicate an abrupt shift to lower-trophic prey in penguin diets within the past approximately 200 years. We posit that penguins only recently began to rely on krill as a major portion of their diet, in conjunction with the removal of baleen whales and krill-eating seals during the historic whaling era. Our results support the "krill surplus" hypothesis that predicts excess krill availability in the Southern Ocean after this period of exploitation.
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