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Relative Changes in Krill Abundance Inferred from Antarctic Fur Seal
Huang, Tao1; Sun, Liguang1; Stark, John2,3; Wang, Yuhong1,4; Cheng, Zhongqi5; Yang, Qichao1; Sun, Song4
2011-11-07
发表期刊PLOS ONE
卷号6期号:11
文章类型Article
摘要Antarctic krill Euphausia superba is a predominant species in the Southern Ocean, it is very sensitive to climate change, and it supports large stocks of fishes, seabirds, seals and whales in Antarctic marine ecosystems. Modern krill stocks have been estimated directly by net hauls and acoustic surveys; the historical krill density especially the long-term one in the Southern Ocean, however, is unknown. Here we inferred the relative krill population changes along the West Antarctic Peninsula (WAP) over the 20th century from the trophic level change of Antarctic fur seal Arctocephalus gazella using stable carbon (delta C-13) and nitrogen (delta N-15) isotopes of archival seal hairs. Since Antarctic fur seals feed preferentially on krill, the variation of delta N-15 in seal hair indicates a change in the proportion of krill in the seal's diets and thus the krill availability in local seawater. For the past century, enriching fur seal delta N-15 values indicated decreasing krill availability. This is agreement with direct observation for the past similar to 30 years and suggests that the recently documented decline in krill populations began in the early parts of the 20th century. This novel method makes it possible to infer past krill population changes from ancient tissues of krill predators.
DOI10.1371/journal.pone.0027331
收录类别SCI
语种英语
WOS记录号WOS:000297347700042
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被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/32943
专题海洋生态与环境科学重点实验室
作者单位1.Univ Sci & Technol China, Inst Polar Environm, Sch Earth & Space Sci, Hefei 230026, Peoples R China
2.Utah State Univ, Dept Biol, Logan, UT 84322 USA
3.Utah State Univ, Ctr Ecol, Logan, UT 84322 USA
4.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
5.CUNY Brooklyn Coll, Brooklyn, NY 11210 USA
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Huang, Tao,Sun, Liguang,Stark, John,et al. Relative Changes in Krill Abundance Inferred from Antarctic Fur Seal[J]. PLOS ONE,2011,6(11).
APA Huang, Tao.,Sun, Liguang.,Stark, John.,Wang, Yuhong.,Cheng, Zhongqi.,...&Sun, Song.(2011).Relative Changes in Krill Abundance Inferred from Antarctic Fur Seal.PLOS ONE,6(11).
MLA Huang, Tao,et al."Relative Changes in Krill Abundance Inferred from Antarctic Fur Seal".PLOS ONE 6.11(2011).
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