Changing circumpolar distributions and isoscapes of Antarctic krill:Indo-Pacifichabitat refuges counter long-term degradation of the Atlantic sector

doi:10.1002/lno.11603

	Changing circumpolar distributions and isoscapes of Antarctic krill:Indo-Pacifichabitat refuges counter long-term degradation of the Atlantic sector
	Yang, Guang 1,2,3; Atkinson, Angus 4; Hill, Simeon L.5; Guglielmo, Letterio 6; Granata, Antonia 7; Li, Chaolun1,2,3,8
	2020-09-21
发表期刊	LIMNOLOGY AND OCEANOGRAPHY
ISSN	0024-3590
页码	16
通讯作者	Li, Chaolun(lcl@qdio.ac.cn)
摘要	The Southern Ocean provides strong contrasts in rates and directions of change in temperature and sea ice between its sectors, but it is unknown how these affect plankton species that are distributed right around Antarctica. Here, we quantify the changing circumpolar distributions of Antarctic krill, based on the CHINARE 2013/14 circum-Antarctic expedition, plus independent analyses of compiled abundance data (KRILLBASE: 1926-2016). In the 1920s-1930s, average krill densities in the Atlantic-Bellingshausen sector were eight times those in the other sectors. More recently, however, the concentration factor has dropped to only about twofold. This reflects a rebalancing broadly commensurate with climatic forcing: krill densities declined in the Atlantic-Bellingshausen sector which has warmed and lost sea ice, densities may have increased in the Ross-Pacific sector which showed the opposite climatic trend, while densities showed no significant changes in the more stable Lazarev-Indian sectors. Such changes would impact circumpolar food webs, so to better define these we examined circumpolar trends of isotopic values in krill and other zooplankton based on the CHINARE cruise and a literature meta-analysis. Krill delta N-15 values ranged significantly between sectors from 2.21 parts per thousand (Indian) to 3.59 parts per thousand (Ross-Pacific), about half a trophic level lower than another key euphausiid,Thysanoessa macrura. These isoscapes form a baseline for interpreting the reliance of predators on euphausiids, within the varying food webs around the continent. Overall, we suggest that the Indo-Pacific sector has acted as a refuge for the circumpolar krill stock while conditions for them deteriorated rapidly in the Atlantic sector.
DOI	10.1002/lno.11603
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Plan of China[2018YFC1406801] ; National Science Foundation of China[41876217] ; response and feedback of the Southern Ocean to climate change[RFSOCC2020-2025] ; World Wildlife Fund
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Limnology ; Oceanography
WOS记录号	WOS:000571639000001
出版者	WILEY
引用统计	被引频次：25[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/337002/168908
专题	海洋生态与环境科学重点实验室
通讯作者	Li, Chaolun
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 4.Plymouth Marine Lab, Prospect Pl, Plymouth, Devon, England 5.British Antarctic Survey, Cambridge, England 6.Stn Zool Anton Dohrn, BIOTECH Dept, Naples, Italy 7.Univ Messina, Dipartimento Sci Biol Chim Farmaceut & Ambientali, Messina, Italy 8.Univ Chinese Acad Sci, Beijing, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Yang, Guang,Atkinson, Angus,Hill, Simeon L.,et al. Changing circumpolar distributions and isoscapes of Antarctic krill:Indo-Pacifichabitat refuges counter long-term degradation of the Atlantic sector[J]. LIMNOLOGY AND OCEANOGRAPHY,2020:16.
APA	Yang, Guang,Atkinson, Angus,Hill, Simeon L.,Guglielmo, Letterio,Granata, Antonia,&Li, Chaolun.(2020).Changing circumpolar distributions and isoscapes of Antarctic krill:Indo-Pacifichabitat refuges counter long-term degradation of the Atlantic sector.LIMNOLOGY AND OCEANOGRAPHY,16.
MLA	Yang, Guang,et al."Changing circumpolar distributions and isoscapes of Antarctic krill:Indo-Pacifichabitat refuges counter long-term degradation of the Atlantic sector".LIMNOLOGY AND OCEANOGRAPHY (2020):16.

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