Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming
Since the Discovery Investigations of the 1920s and 1930s, seawater temperatures have increased in the Atlantic sector by ∼1 °C; greater than the global mean rise. The aims of this paper were first to rescue the Discovery macrozooplankton data, second to provide quantitative “baseline” distribution...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/16865/ http://www.sciencedirect.com/science/article/pii/S0967064511002177 |
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ftnerc:oai:nora.nerc.ac.uk:16865 2023-05-15T13:45:11+02:00 Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming Mackey, Andrew Atkinson, Angus Hill, Simeon Ward, Peter Cunningham, Nathan Johnston, Nadine Murphy, Eugene 2012 http://nora.nerc.ac.uk/id/eprint/16865/ http://www.sciencedirect.com/science/article/pii/S0967064511002177 unknown Elsevier Mackey, Andrew; Atkinson, Angus; Hill, Simeon orcid:0000-0003-1441-8769 Ward, Peter; Cunningham, Nathan; Johnston, Nadine; Murphy, Eugene orcid:0000-0002-7369-9196 . 2012 Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming. Deep Sea Research II, 59-60. 130-146. https://doi.org/10.1016/j.dsr2.2011.08.011 <https://doi.org/10.1016/j.dsr2.2011.08.011> Publication - Article PeerReviewed 2012 ftnerc https://doi.org/10.1016/j.dsr2.2011.08.011 2023-02-04T19:30:48Z Since the Discovery Investigations of the 1920s and 1930s, seawater temperatures have increased in the Atlantic sector by ∼1 °C; greater than the global mean rise. The aims of this paper were first to rescue the Discovery macrozooplankton data, second to provide quantitative “baseline” distribution maps, relating these to indices of temperature and food. Our third aim was to use the relationships we derived between abundance and temperature to project the potential affect of a 1 °C warming on the Discovery era distribution patterns. Based on the 1 m ringnet data retrieved from 615 stations (Nov–March), four taxa comprised >90% of the Antarctic macrozooplankton abundance: Rhincalanus gigas, Thysanoessa spp., Euphausia superba, and Chaetognaths. Most of the taxa, especially the more abundant ones, were warm water species penetrating into Antarctica and thus total macrozooplankton abundance decreased about 100-fold from 50°S to 70°S. While temperature correlated best with distribution at this large scale, food availability (proxied by a present-day satellite-based Chlorophyll a climatology) had a secondary effect, with the major euphausiids Euphausia superba and Thysanoessa spp. concentrated in high chl a areas. A modelled uniform 1 °C temperature rise produced a poleward shift for all taxa, but the Antarctic continent blocked this re-adjustment for the high latitude species, constricting their predicted range. More widespread polar/sub-polar species were predicted to increase their penetration into Antarctica by 4–12° in latitude, whereas the poleward shift in potential range of sub-Antarctic taxa were limited by the steep temperature gradient across the Antarctic Polar Front (APF). However, within the Scotia Sea the relatively warm temperatures of the northern Antarctic Zone, abundant food due to iron fertilisation and intense eddy activity provide a “gateway” for northern species to penetrate south of the APF. Our model predictions, based on measured distributional ranges and observed temperature increases, ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea Euphausia superba Scotia Sea Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Scotia Sea Bellingshausen Sea Deep Sea Research Part II: Topical Studies in Oceanography 59-60 130 146 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Since the Discovery Investigations of the 1920s and 1930s, seawater temperatures have increased in the Atlantic sector by ∼1 °C; greater than the global mean rise. The aims of this paper were first to rescue the Discovery macrozooplankton data, second to provide quantitative “baseline” distribution maps, relating these to indices of temperature and food. Our third aim was to use the relationships we derived between abundance and temperature to project the potential affect of a 1 °C warming on the Discovery era distribution patterns. Based on the 1 m ringnet data retrieved from 615 stations (Nov–March), four taxa comprised >90% of the Antarctic macrozooplankton abundance: Rhincalanus gigas, Thysanoessa spp., Euphausia superba, and Chaetognaths. Most of the taxa, especially the more abundant ones, were warm water species penetrating into Antarctica and thus total macrozooplankton abundance decreased about 100-fold from 50°S to 70°S. While temperature correlated best with distribution at this large scale, food availability (proxied by a present-day satellite-based Chlorophyll a climatology) had a secondary effect, with the major euphausiids Euphausia superba and Thysanoessa spp. concentrated in high chl a areas. A modelled uniform 1 °C temperature rise produced a poleward shift for all taxa, but the Antarctic continent blocked this re-adjustment for the high latitude species, constricting their predicted range. More widespread polar/sub-polar species were predicted to increase their penetration into Antarctica by 4–12° in latitude, whereas the poleward shift in potential range of sub-Antarctic taxa were limited by the steep temperature gradient across the Antarctic Polar Front (APF). However, within the Scotia Sea the relatively warm temperatures of the northern Antarctic Zone, abundant food due to iron fertilisation and intense eddy activity provide a “gateway” for northern species to penetrate south of the APF. Our model predictions, based on measured distributional ranges and observed temperature increases, ... |
format |
Article in Journal/Newspaper |
author |
Mackey, Andrew Atkinson, Angus Hill, Simeon Ward, Peter Cunningham, Nathan Johnston, Nadine Murphy, Eugene |
spellingShingle |
Mackey, Andrew Atkinson, Angus Hill, Simeon Ward, Peter Cunningham, Nathan Johnston, Nadine Murphy, Eugene Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
author_facet |
Mackey, Andrew Atkinson, Angus Hill, Simeon Ward, Peter Cunningham, Nathan Johnston, Nadine Murphy, Eugene |
author_sort |
Mackey, Andrew |
title |
Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
title_short |
Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
title_full |
Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
title_fullStr |
Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
title_full_unstemmed |
Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
title_sort |
antarctic macrozooplankton of the southwest atlantic sector and bellingshausen sea: baseline historical distributions (discovery investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming |
publisher |
Elsevier |
publishDate |
2012 |
url |
http://nora.nerc.ac.uk/id/eprint/16865/ http://www.sciencedirect.com/science/article/pii/S0967064511002177 |
geographic |
Antarctic The Antarctic Scotia Sea Bellingshausen Sea |
geographic_facet |
Antarctic The Antarctic Scotia Sea Bellingshausen Sea |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Euphausia superba Scotia Sea |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Euphausia superba Scotia Sea |
op_relation |
Mackey, Andrew; Atkinson, Angus; Hill, Simeon orcid:0000-0003-1441-8769 Ward, Peter; Cunningham, Nathan; Johnston, Nadine; Murphy, Eugene orcid:0000-0002-7369-9196 . 2012 Antarctic macrozooplankton of the southwest Atlantic sector and Bellingshausen Sea: Baseline historical distributions (Discovery Investigations, 1928–1935) related to temperature and food, with projections for subsequent ocean warming. Deep Sea Research II, 59-60. 130-146. https://doi.org/10.1016/j.dsr2.2011.08.011 <https://doi.org/10.1016/j.dsr2.2011.08.011> |
op_doi |
https://doi.org/10.1016/j.dsr2.2011.08.011 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
59-60 |
container_start_page |
130 |
op_container_end_page |
146 |
_version_ |
1766216168017756160 |