Relative Changes in Krill Abundance Inferred from Antarctic Fur Seal

doi:10.1371/journal.pone.0027331

	Relative Changes in Krill Abundance Inferred from Antarctic Fur Seal
	Huang, Tao 1; Sun, Liguang 1; Stark, John 2,3; Wang, Yuhong 1,4; Cheng, Zhongqi 5; Yang, Qichao 1; 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.
DOI	10.1371/journal.pone.0027331
收录类别	SCI
语种	英语
WOS记录号	WOS:000297347700042
引用统计	被引频次：23[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
推荐引用方式 GB/T 7714	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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