Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula
Micronektonic fishes and invertebrates were sampled with 32 midwater trawls at nine sites along the Western Antarctic Peninsula (WAP) in the austral fall (March-April) of 2010. Study sites were located within four hypothesized hydrographic regions: near Joinville Island in Region I, at Croker Passag...
Published in: | Journal of Marine Systems |
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Main Authors: | , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
2015
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Online Access: | http://hdl.handle.net/11577/3168642 https://doi.org/10.1016/j.jmarsys.2015.07.005 |
id |
ftunivpadovairis:oai:www.research.unipd.it:11577/3168642 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
Assemblage Continental shelf Macrozooplankton Micronekton Pleuragramma Western antarctic peninsula Aquatic Science Oceanography Ecology Evolution Behavior and Systematics |
spellingShingle |
Assemblage Continental shelf Macrozooplankton Micronekton Pleuragramma Western antarctic peninsula Aquatic Science Oceanography Ecology Evolution Behavior and Systematics Parker, Melanie L. Fraser, William R. Ashford, Julian Torres, Joseph J. PATARNELLO, TOMASO ZANE, LORENZO Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula |
topic_facet |
Assemblage Continental shelf Macrozooplankton Micronekton Pleuragramma Western antarctic peninsula Aquatic Science Oceanography Ecology Evolution Behavior and Systematics |
description |
Micronektonic fishes and invertebrates were sampled with 32 midwater trawls at nine sites along the Western Antarctic Peninsula (WAP) in the austral fall (March-April) of 2010. Study sites were located within four hypothesized hydrographic regions: near Joinville Island in Region I, at Croker Passage, near Anvers Island, and near Renaud Island in Region II, within Marguerite Bay and the Marguerite Trough in Region III, and near Charcot Island in Region IV. A total of 62 taxa representing 12 taxonomic groups of pelagic invertebrates and 9 families of fish were captured, but assemblages were dominated by only a few species. The most numerically abundant taxa were the euphausiids, Thysanoessa macrura, Euphausia superba, and E. crystallorophias, combining to contribute nearly 79% of the total catch. Biomass dominants included E. superba, which contributed more than 44% of the total catch, the notothenioid Pleuragramma antarctica, and the salp, Salpa thompsoni. A comparison of total catches among sites revealed that the largest volumetric abundances and biomasses were captured at the Marguerite Bay site.Cluster analysis of abundance data identified distinct multispecies assemblages at Joinville Island in Region I, Croker Passage in Region II, Marguerite Bay in Region III, and Charcot Island in Region IV. A fifth distinct assemblage included samples from sites near Anvers and Renaud Island in Region II, and from the Marguerite Trough in Region III. Assemblages at Joinville Island and Croker Passage were both dominated by E. superba and S. thompsoni, but hydrographic conditions at Joinville Island favored a neritic assemblage, underscored by substantial numbers of P. antarctica. The assemblage at Croker Passage was more oceanic in nature with major inputs from the myctophid, Electrona antarctica and the hyperiid amphipod, Themisto gaudichaudii. Marguerite Bay and Charcot Island were well-mixed assemblages with strong representation by both neritic and oceanic fauna. The mid-peninsula assemblage was oceanic in ... |
author2 |
Parker, Melanie L. Fraser, William R. Ashford, Julian Patarnello, Tomaso Zane, Lorenzo Torres, Joseph J. |
format |
Article in Journal/Newspaper |
author |
Parker, Melanie L. Fraser, William R. Ashford, Julian Torres, Joseph J. PATARNELLO, TOMASO ZANE, LORENZO |
author_facet |
Parker, Melanie L. Fraser, William R. Ashford, Julian Torres, Joseph J. PATARNELLO, TOMASO ZANE, LORENZO |
author_sort |
Parker, Melanie L. |
title |
Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula |
title_short |
Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula |
title_full |
Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula |
title_fullStr |
Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula |
title_full_unstemmed |
Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula |
title_sort |
assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the western antarctic peninsula |
publisher |
Elsevier |
publishDate |
2015 |
url |
http://hdl.handle.net/11577/3168642 https://doi.org/10.1016/j.jmarsys.2015.07.005 |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.000,-68.000,-68.500,-68.500) ENVELOPE(139.017,139.017,-69.367,-69.367) ENVELOPE(-63.500,-63.500,-64.600,-64.600) ENVELOPE(-67.950,-67.950,-65.700,-65.700) ENVELOPE(-63.500,-63.500,-64.600,-64.600) ENVELOPE(-55.867,-55.867,-63.250,-63.250) ENVELOPE(-55.667,-55.667,-63.350,-63.350) ENVELOPE(-61.683,-61.683,-63.966,-63.966) ENVELOPE(-75.250,-75.250,-69.750,-69.750) ENVELOPE(-61.683,-61.683,-63.966,-63.966) ENVELOPE(-66.000,-66.000,-66.167,-66.167) |
geographic |
Antarctic Antarctic Peninsula Austral Marguerite Marguerite Bay Charcot Anvers Renaud Anvers Island Joinville Joinville Island Croker Charcot Island Croker Passage Renaud Island |
geographic_facet |
Antarctic Antarctic Peninsula Austral Marguerite Marguerite Bay Charcot Anvers Renaud Anvers Island Joinville Joinville Island Croker Charcot Island Croker Passage Renaud Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Anvers Island Charcot Island Euphausia superba Joinville Island Renaud Island Thysanoessa macrura |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Anvers Island Charcot Island Euphausia superba Joinville Island Renaud Island Thysanoessa macrura |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000362382500002 volume:152 firstpage:18 lastpage:41 numberofpages:24 journal:JOURNAL OF MARINE SYSTEMS http://hdl.handle.net/11577/3168642 doi:10.1016/j.jmarsys.2015.07.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84939506886 www.elsevier.com/inca/publications/store/5/0/3/3/4/4 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2015.07.005 |
container_title |
Journal of Marine Systems |
container_volume |
152 |
container_start_page |
18 |
op_container_end_page |
41 |
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1796300171804409856 |
spelling |
ftunivpadovairis:oai:www.research.unipd.it:11577/3168642 2024-04-14T08:03:52+00:00 Assemblages of micronektonic fishes and invertebrates in a gradient of regional warming along the Western Antarctic Peninsula Parker, Melanie L. Fraser, William R. Ashford, Julian Torres, Joseph J. PATARNELLO, TOMASO ZANE, LORENZO Parker, Melanie L. Fraser, William R. Ashford, Julian Patarnello, Tomaso Zane, Lorenzo Torres, Joseph J. 2015 ELETTRONICO http://hdl.handle.net/11577/3168642 https://doi.org/10.1016/j.jmarsys.2015.07.005 eng eng Elsevier info:eu-repo/semantics/altIdentifier/wos/WOS:000362382500002 volume:152 firstpage:18 lastpage:41 numberofpages:24 journal:JOURNAL OF MARINE SYSTEMS http://hdl.handle.net/11577/3168642 doi:10.1016/j.jmarsys.2015.07.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84939506886 www.elsevier.com/inca/publications/store/5/0/3/3/4/4 Assemblage Continental shelf Macrozooplankton Micronekton Pleuragramma Western antarctic peninsula Aquatic Science Oceanography Ecology Evolution Behavior and Systematics info:eu-repo/semantics/article 2015 ftunivpadovairis https://doi.org/10.1016/j.jmarsys.2015.07.005 2024-03-21T19:37:53Z Micronektonic fishes and invertebrates were sampled with 32 midwater trawls at nine sites along the Western Antarctic Peninsula (WAP) in the austral fall (March-April) of 2010. Study sites were located within four hypothesized hydrographic regions: near Joinville Island in Region I, at Croker Passage, near Anvers Island, and near Renaud Island in Region II, within Marguerite Bay and the Marguerite Trough in Region III, and near Charcot Island in Region IV. A total of 62 taxa representing 12 taxonomic groups of pelagic invertebrates and 9 families of fish were captured, but assemblages were dominated by only a few species. The most numerically abundant taxa were the euphausiids, Thysanoessa macrura, Euphausia superba, and E. crystallorophias, combining to contribute nearly 79% of the total catch. Biomass dominants included E. superba, which contributed more than 44% of the total catch, the notothenioid Pleuragramma antarctica, and the salp, Salpa thompsoni. A comparison of total catches among sites revealed that the largest volumetric abundances and biomasses were captured at the Marguerite Bay site.Cluster analysis of abundance data identified distinct multispecies assemblages at Joinville Island in Region I, Croker Passage in Region II, Marguerite Bay in Region III, and Charcot Island in Region IV. A fifth distinct assemblage included samples from sites near Anvers and Renaud Island in Region II, and from the Marguerite Trough in Region III. Assemblages at Joinville Island and Croker Passage were both dominated by E. superba and S. thompsoni, but hydrographic conditions at Joinville Island favored a neritic assemblage, underscored by substantial numbers of P. antarctica. The assemblage at Croker Passage was more oceanic in nature with major inputs from the myctophid, Electrona antarctica and the hyperiid amphipod, Themisto gaudichaudii. Marguerite Bay and Charcot Island were well-mixed assemblages with strong representation by both neritic and oceanic fauna. The mid-peninsula assemblage was oceanic in ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Anvers Island Charcot Island Euphausia superba Joinville Island Renaud Island Thysanoessa macrura Padua Research Archive (IRIS - Università degli Studi di Padova) Antarctic Antarctic Peninsula Austral Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Charcot ENVELOPE(139.017,139.017,-69.367,-69.367) Anvers ENVELOPE(-63.500,-63.500,-64.600,-64.600) Renaud ENVELOPE(-67.950,-67.950,-65.700,-65.700) Anvers Island ENVELOPE(-63.500,-63.500,-64.600,-64.600) Joinville ENVELOPE(-55.867,-55.867,-63.250,-63.250) Joinville Island ENVELOPE(-55.667,-55.667,-63.350,-63.350) Croker ENVELOPE(-61.683,-61.683,-63.966,-63.966) Charcot Island ENVELOPE(-75.250,-75.250,-69.750,-69.750) Croker Passage ENVELOPE(-61.683,-61.683,-63.966,-63.966) Renaud Island ENVELOPE(-66.000,-66.000,-66.167,-66.167) Journal of Marine Systems 152 18 41 |