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

doi:10.1002/lno.11603

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	Changing circumpolar distributions and isoscapes of Antarctic krill:Indo-Pacifichabitat refuges counter long-term degradation of the Atlantic sector
	Yang, Guang 2,3,4; Atkinson, Angus 5; Hill, Simeon L.6; Guglielmo, Letterio 7; Granata, Antonia 8; Li, Chaolun 1,2,3,4
刊名	LIMNOLOGY AND OCEANOGRAPHY
	2020-09-21
页码	16
ISSN号	0024-3590
DOI	10.1002/lno.11603
通讯作者	Li, Chaolun(lcl@qdio.ac.cn)
英文摘要	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.
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
语种	英语
出版者	WILEY
WOS记录号	WOS:000571639000001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/168907]
专题	海洋研究所_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.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Plymouth Marine Lab, Prospect Pl, Plymouth, Devon, England 6.British Antarctic Survey, Cambridge, England 7.Stn Zool Anton Dohrn, BIOTECH Dept, Naples, Italy 8.Univ Messina, Dipartimento Sci Biol Chim Farmaceut & Ambientali, Messina, Italy
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.