Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton
The macrozooplankton and micronekton community of the Lazarev Sea (Southern Ocean) was investigated at 3 depth layers during austral summer, autumn and winter: (1) the surface layer (0–2 m); (2) the epipelagic layer (0–200 m); and (3) the deep layer (0–3000 m). Altogether, 132 species were identifie...
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ftopenagrar:oai:www.openagrar.de:timport_mods_00013871 2024-09-15T17:42:50+00:00 Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton Flores, Hauke Hunt, Brian Peter Vere Kruse, Svenja Pakhomov, Evgeny A. Siegel, Volker Franeker, Jan A. van Strass, Volker H. van de Putte, Anton P. Meesters, Erik H. Bathmann, Ulrich 2014 14 https://www.openagrar.de/receive/timport_mods_00013871 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013871/dn053093.pdf eng eng Deep-sea research / Part 1, Oceanographic research papers -- Deep Sea Res -- 0967-0637 -- 1146810-5 https://www.openagrar.de/receive/timport_mods_00013871 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013871/dn053093.pdf only signed in user info:eu-repo/semantics/restrictedAccess article Text Southern Ocean Zooplankton Seasonal variability Surface layer Vertical migration Sea ice article Text doc-type:article 2014 ftopenagrar 2024-07-08T23:56:24Z The macrozooplankton and micronekton community of the Lazarev Sea (Southern Ocean) was investigated at 3 depth layers during austral summer, autumn and winter: (1) the surface layer (0–2 m); (2) the epipelagic layer (0–200 m); and (3) the deep layer (0–3000 m). Altogether, 132 species were identified. Species composition changed with depth from a euphausiid-dominated community in the surface layer, via a siphonophore-dominated community in the epipelagic layer, to a chaetognath-dominated community in the deep layer. The surface layer community predominantly changed along gradients of surface water temperature and sea ice parameters, whereas the epipelagic community mainly changed along hydrographical gradients. Although representing only 1% of the depth range of the epipelagic layer, mean per-area macrofauna densities in the surface layer ranged at 8% of corresponding epipelagic densities in summer, 6% in autumn, and 24% in winter. Seasonal shifts of these proportional densities in abundant species indicated different strategies in the use of the surface layer, including both hibernal downward and hibernal upward shift in the vertical distribution, as well as year-round surface layer use by Antarctic krill. These findings imply that the surface layer, especially when it is ice-covered, is an important functional node of the pelagic ecosystem that has been underestimated by conventional depth-integrated sampling in the past. The exposure of this key habitat to climate-driven forces most likely adds to the known susceptibility of Antarctic pelagic ecosystems to temperature rise and changing sea ice conditions Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill antartic* Lazarev Sea Sea ice Southern Ocean OpenAgrar (OA) |
institution |
Open Polar |
collection |
OpenAgrar (OA) |
op_collection_id |
ftopenagrar |
language |
English |
topic |
article Text Southern Ocean Zooplankton Seasonal variability Surface layer Vertical migration Sea ice |
spellingShingle |
article Text Southern Ocean Zooplankton Seasonal variability Surface layer Vertical migration Sea ice Flores, Hauke Hunt, Brian Peter Vere Kruse, Svenja Pakhomov, Evgeny A. Siegel, Volker Franeker, Jan A. van Strass, Volker H. van de Putte, Anton P. Meesters, Erik H. Bathmann, Ulrich Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton |
topic_facet |
article Text Southern Ocean Zooplankton Seasonal variability Surface layer Vertical migration Sea ice |
description |
The macrozooplankton and micronekton community of the Lazarev Sea (Southern Ocean) was investigated at 3 depth layers during austral summer, autumn and winter: (1) the surface layer (0–2 m); (2) the epipelagic layer (0–200 m); and (3) the deep layer (0–3000 m). Altogether, 132 species were identified. Species composition changed with depth from a euphausiid-dominated community in the surface layer, via a siphonophore-dominated community in the epipelagic layer, to a chaetognath-dominated community in the deep layer. The surface layer community predominantly changed along gradients of surface water temperature and sea ice parameters, whereas the epipelagic community mainly changed along hydrographical gradients. Although representing only 1% of the depth range of the epipelagic layer, mean per-area macrofauna densities in the surface layer ranged at 8% of corresponding epipelagic densities in summer, 6% in autumn, and 24% in winter. Seasonal shifts of these proportional densities in abundant species indicated different strategies in the use of the surface layer, including both hibernal downward and hibernal upward shift in the vertical distribution, as well as year-round surface layer use by Antarctic krill. These findings imply that the surface layer, especially when it is ice-covered, is an important functional node of the pelagic ecosystem that has been underestimated by conventional depth-integrated sampling in the past. The exposure of this key habitat to climate-driven forces most likely adds to the known susceptibility of Antarctic pelagic ecosystems to temperature rise and changing sea ice conditions |
format |
Article in Journal/Newspaper |
author |
Flores, Hauke Hunt, Brian Peter Vere Kruse, Svenja Pakhomov, Evgeny A. Siegel, Volker Franeker, Jan A. van Strass, Volker H. van de Putte, Anton P. Meesters, Erik H. Bathmann, Ulrich |
author_facet |
Flores, Hauke Hunt, Brian Peter Vere Kruse, Svenja Pakhomov, Evgeny A. Siegel, Volker Franeker, Jan A. van Strass, Volker H. van de Putte, Anton P. Meesters, Erik H. Bathmann, Ulrich |
author_sort |
Flores, Hauke |
title |
Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton |
title_short |
Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton |
title_full |
Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton |
title_fullStr |
Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton |
title_full_unstemmed |
Seasonal changes in the vertical distribution and community structure of Antartic macrozooplankton and micronekton |
title_sort |
seasonal changes in the vertical distribution and community structure of antartic macrozooplankton and micronekton |
publishDate |
2014 |
url |
https://www.openagrar.de/receive/timport_mods_00013871 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013871/dn053093.pdf |
genre |
Antarc* Antarctic Antarctic Krill antartic* Lazarev Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill antartic* Lazarev Sea Sea ice Southern Ocean |
op_relation |
Deep-sea research / Part 1, Oceanographic research papers -- Deep Sea Res -- 0967-0637 -- 1146810-5 https://www.openagrar.de/receive/timport_mods_00013871 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00013871/dn053093.pdf |
op_rights |
only signed in user info:eu-repo/semantics/restrictedAccess |
_version_ |
1810489602896560128 |