Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill
Poleward range shifts are a global-scale response to warming, but these vary greatly among taxa and are hard to predict for individual species, localized regions or over shorter (years to decadal) timescales. Moving poleward might be easier in the Arctic than in the Southern Ocean, where evidence fo...
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WILEY
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Online Access: | http://ir.qdio.ac.cn/handle/337002/177488 http://ir.qdio.ac.cn/handle/337002/177489 https://doi.org/10.1111/gcb.16009 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/177489 2023-05-15T13:50:10+02:00 Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill Atkinson, Angus Hill, Simeon L. Reiss, Christian S. Pakhomov, Evgeny A. Beaugrand, Gregory Tarling, Geraint A. Yang, Guang Steinberg, Deborah K. Schmidt, Katrin Edwards, Martin Rombola, Emilce Perry, Frances A. 2021-12-18 http://ir.qdio.ac.cn/handle/337002/177488 http://ir.qdio.ac.cn/handle/337002/177489 https://doi.org/10.1111/gcb.16009 英语 eng WILEY GLOBAL CHANGE BIOLOGY http://ir.qdio.ac.cn/handle/337002/177488 http://ir.qdio.ac.cn/handle/337002/177489 doi:10.1111/gcb.16009 abrupt community shift Antarctic krill ecosystem shift euphausiid management marine protected areas range shift recruitment spawning Biodiversity & Conservation Environmental Sciences & Ecology Biodiversity Conservation Ecology Environmental Sciences 期刊论文 2021 ftchinacasciocas https://doi.org/10.1111/gcb.16009 2022-06-27T05:46:36Z Poleward range shifts are a global-scale response to warming, but these vary greatly among taxa and are hard to predict for individual species, localized regions or over shorter (years to decadal) timescales. Moving poleward might be easier in the Arctic than in the Southern Ocean, where evidence for range shifts is sparse and contradictory. Here, we compiled a database of larval Antarctic krill, Euphausia superba and, together with an adult database, it showed how their range shift is out of step with the pace of warming. During a 70-year period of rapid warming (1920s-1990s), distribution centres of both larvae and adults in the SW Atlantic sector remained fixed, despite warming by 0.5-1.0 degrees C and losing sea ice. This was followed by a hiatus in surface warming and ice loss, yet during this period the distributions of krill life stages shifted greatly, by similar to 1000 km, to the south-west. Understanding the mechanism of such step changes is essential, since they herald system reorganizations that are hard to predict with current modelling approaches. We propose that the abrupt shift was driven by climatic controls acting on localized recruitment hotspots, superimposed on thermal niche conservatism. During the warming hiatus, the Southern Annular Mode index continued to become increasingly positive and, likely through reduced feeding success for larvae, this led to a precipitous decline in recruitment from the main reproduction hotspot along the southern Scotia Arc. This cut replenishment to the northern portion of the krill stock, as evidenced by declining density and swarm frequency. Concomitantly, a new, southern reproduction area developed after the 1990s, reinforcing the range shift despite the lack of surface warming. New spawning hotspots may provide the stepping stones needed for range shifts into polar regions, so planning of climate-ready marine protected areas should include these key areas of future habitat. Report Antarc* Antarctic Antarctic Krill Antarctica Arctic Euphausia superba Sea ice Southern Ocean Stepping Stones Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Antarctic Arctic Southern Ocean Stepping Stones ENVELOPE(-63.992,-63.992,-64.786,-64.786) Global Change Biology 28 4 1359 1375 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
abrupt community shift Antarctic krill ecosystem shift euphausiid management marine protected areas range shift recruitment spawning Biodiversity & Conservation Environmental Sciences & Ecology Biodiversity Conservation Ecology Environmental Sciences |
spellingShingle |
abrupt community shift Antarctic krill ecosystem shift euphausiid management marine protected areas range shift recruitment spawning Biodiversity & Conservation Environmental Sciences & Ecology Biodiversity Conservation Ecology Environmental Sciences Atkinson, Angus Hill, Simeon L. Reiss, Christian S. Pakhomov, Evgeny A. Beaugrand, Gregory Tarling, Geraint A. Yang, Guang Steinberg, Deborah K. Schmidt, Katrin Edwards, Martin Rombola, Emilce Perry, Frances A. Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill |
topic_facet |
abrupt community shift Antarctic krill ecosystem shift euphausiid management marine protected areas range shift recruitment spawning Biodiversity & Conservation Environmental Sciences & Ecology Biodiversity Conservation Ecology Environmental Sciences |
description |
Poleward range shifts are a global-scale response to warming, but these vary greatly among taxa and are hard to predict for individual species, localized regions or over shorter (years to decadal) timescales. Moving poleward might be easier in the Arctic than in the Southern Ocean, where evidence for range shifts is sparse and contradictory. Here, we compiled a database of larval Antarctic krill, Euphausia superba and, together with an adult database, it showed how their range shift is out of step with the pace of warming. During a 70-year period of rapid warming (1920s-1990s), distribution centres of both larvae and adults in the SW Atlantic sector remained fixed, despite warming by 0.5-1.0 degrees C and losing sea ice. This was followed by a hiatus in surface warming and ice loss, yet during this period the distributions of krill life stages shifted greatly, by similar to 1000 km, to the south-west. Understanding the mechanism of such step changes is essential, since they herald system reorganizations that are hard to predict with current modelling approaches. We propose that the abrupt shift was driven by climatic controls acting on localized recruitment hotspots, superimposed on thermal niche conservatism. During the warming hiatus, the Southern Annular Mode index continued to become increasingly positive and, likely through reduced feeding success for larvae, this led to a precipitous decline in recruitment from the main reproduction hotspot along the southern Scotia Arc. This cut replenishment to the northern portion of the krill stock, as evidenced by declining density and swarm frequency. Concomitantly, a new, southern reproduction area developed after the 1990s, reinforcing the range shift despite the lack of surface warming. New spawning hotspots may provide the stepping stones needed for range shifts into polar regions, so planning of climate-ready marine protected areas should include these key areas of future habitat. |
format |
Report |
author |
Atkinson, Angus Hill, Simeon L. Reiss, Christian S. Pakhomov, Evgeny A. Beaugrand, Gregory Tarling, Geraint A. Yang, Guang Steinberg, Deborah K. Schmidt, Katrin Edwards, Martin Rombola, Emilce Perry, Frances A. |
author_facet |
Atkinson, Angus Hill, Simeon L. Reiss, Christian S. Pakhomov, Evgeny A. Beaugrand, Gregory Tarling, Geraint A. Yang, Guang Steinberg, Deborah K. Schmidt, Katrin Edwards, Martin Rombola, Emilce Perry, Frances A. |
author_sort |
Atkinson, Angus |
title |
Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill |
title_short |
Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill |
title_full |
Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill |
title_fullStr |
Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill |
title_full_unstemmed |
Stepping stones towards Antarctica: Switch to southern spawning grounds explains an abrupt range shift in krill |
title_sort |
stepping stones towards antarctica: switch to southern spawning grounds explains an abrupt range shift in krill |
publisher |
WILEY |
publishDate |
2021 |
url |
http://ir.qdio.ac.cn/handle/337002/177488 http://ir.qdio.ac.cn/handle/337002/177489 https://doi.org/10.1111/gcb.16009 |
long_lat |
ENVELOPE(-63.992,-63.992,-64.786,-64.786) |
geographic |
Antarctic Arctic Southern Ocean Stepping Stones |
geographic_facet |
Antarctic Arctic Southern Ocean Stepping Stones |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Arctic Euphausia superba Sea ice Southern Ocean Stepping Stones |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Arctic Euphausia superba Sea ice Southern Ocean Stepping Stones |
op_relation |
GLOBAL CHANGE BIOLOGY http://ir.qdio.ac.cn/handle/337002/177488 http://ir.qdio.ac.cn/handle/337002/177489 doi:10.1111/gcb.16009 |
op_doi |
https://doi.org/10.1111/gcb.16009 |
container_title |
Global Change Biology |
container_volume |
28 |
container_issue |
4 |
container_start_page |
1359 |
op_container_end_page |
1375 |
_version_ |
1766253136199024640 |