Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls.
Quantitative camera surveys of benthic megafauna were carried out during the expedition ARK-XXVII/3 to the Eastern Central Arctic Basins with the research icebreaker Polarstern in summer 2012 (2 August-29 September). Nine transects were performed for the first time in deep-sea areas previously fully...
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ftdoajarticles:oai:doaj.org/article:87cc11743de24a8e92198cd187593530 2023-05-15T13:22:45+02:00 Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. Elena Rybakova Antonina Kremenetskaia Andrey Vedenin Antje Boetius Andrey Gebruk 2019-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0211009 https://doaj.org/article/87cc11743de24a8e92198cd187593530 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0211009 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0211009 https://doaj.org/article/87cc11743de24a8e92198cd187593530 PLoS ONE, Vol 14, Iss 7, p e0211009 (2019) Medicine R Science Q article 2019 ftdoajarticles https://doi.org/10.1371/journal.pone.0211009 2022-12-31T05:03:17Z Quantitative camera surveys of benthic megafauna were carried out during the expedition ARK-XXVII/3 to the Eastern Central Arctic Basins with the research icebreaker Polarstern in summer 2012 (2 August-29 September). Nine transects were performed for the first time in deep-sea areas previously fully covered by ice, four of them in the Nansen Basin (3571-4066m) and five in the Amundsen Basin (4041-4384m). At seven of these stations benthic Agassiz trawls were taken near the camera tracks for species identification. Observed Arctic deep-sea megafauna was largely endemic. Several taxa showed a substantially greater depth or geographical range than previously assumed. Variations in the composition and structure of megabenthic communities were analysed and linked to several environmental variables, including state of the sea ice and phytodetritus supply to the seafloor. Three different types of communities were identified based on species dominating the biomass. Among these species were the actiniarian Bathyphellia margaritacea and the holothurians Elpidia heckeri and Kolga hyalina. Variations in megafaunal abundance were first of all related to the proximity to the marginal ice zone. Stations located closer to this zone were characterized by relatively high densities and biomass of B. margaritacea. Food supply was higher at these stations, as suggested by enhanced concentrations of pigments, organic carbon, bacterial cell abundances and nutrients in the sediments. Fully ice-covered stations closer to the North Pole and partially under multi-year ice were characterized by lower concentrations of the same biogeochemical indicators for food supply. These stations nevertheless hosted relatively high density and biomass of the holothurians E. heckeri or K. hyalina, which were observed to feed on large food falls of the sea-ice colonial diatom Melosira arctica. The link between the community structure of megafauna and the extent and condition of the Central Arctic sea-ice cover suggests that future climate changes may ... Article in Journal/Newspaper amundsen basin Arctic Nansen Basin North Pole Sea ice Directory of Open Access Journals: DOAJ Articles Arctic North Pole Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) PLOS ONE 14 7 e0211009 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Elena Rybakova Antonina Kremenetskaia Andrey Vedenin Antje Boetius Andrey Gebruk Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. |
topic_facet |
Medicine R Science Q |
description |
Quantitative camera surveys of benthic megafauna were carried out during the expedition ARK-XXVII/3 to the Eastern Central Arctic Basins with the research icebreaker Polarstern in summer 2012 (2 August-29 September). Nine transects were performed for the first time in deep-sea areas previously fully covered by ice, four of them in the Nansen Basin (3571-4066m) and five in the Amundsen Basin (4041-4384m). At seven of these stations benthic Agassiz trawls were taken near the camera tracks for species identification. Observed Arctic deep-sea megafauna was largely endemic. Several taxa showed a substantially greater depth or geographical range than previously assumed. Variations in the composition and structure of megabenthic communities were analysed and linked to several environmental variables, including state of the sea ice and phytodetritus supply to the seafloor. Three different types of communities were identified based on species dominating the biomass. Among these species were the actiniarian Bathyphellia margaritacea and the holothurians Elpidia heckeri and Kolga hyalina. Variations in megafaunal abundance were first of all related to the proximity to the marginal ice zone. Stations located closer to this zone were characterized by relatively high densities and biomass of B. margaritacea. Food supply was higher at these stations, as suggested by enhanced concentrations of pigments, organic carbon, bacterial cell abundances and nutrients in the sediments. Fully ice-covered stations closer to the North Pole and partially under multi-year ice were characterized by lower concentrations of the same biogeochemical indicators for food supply. These stations nevertheless hosted relatively high density and biomass of the holothurians E. heckeri or K. hyalina, which were observed to feed on large food falls of the sea-ice colonial diatom Melosira arctica. The link between the community structure of megafauna and the extent and condition of the Central Arctic sea-ice cover suggests that future climate changes may ... |
format |
Article in Journal/Newspaper |
author |
Elena Rybakova Antonina Kremenetskaia Andrey Vedenin Antje Boetius Andrey Gebruk |
author_facet |
Elena Rybakova Antonina Kremenetskaia Andrey Vedenin Antje Boetius Andrey Gebruk |
author_sort |
Elena Rybakova |
title |
Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. |
title_short |
Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. |
title_full |
Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. |
title_fullStr |
Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. |
title_full_unstemmed |
Deep-sea megabenthos communities of the Eurasian Central Arctic are influenced by ice-cover and sea-ice algal falls. |
title_sort |
deep-sea megabenthos communities of the eurasian central arctic are influenced by ice-cover and sea-ice algal falls. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2019 |
url |
https://doi.org/10.1371/journal.pone.0211009 https://doaj.org/article/87cc11743de24a8e92198cd187593530 |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) |
geographic |
Arctic North Pole Amundsen Basin |
geographic_facet |
Arctic North Pole Amundsen Basin |
genre |
amundsen basin Arctic Nansen Basin North Pole Sea ice |
genre_facet |
amundsen basin Arctic Nansen Basin North Pole Sea ice |
op_source |
PLoS ONE, Vol 14, Iss 7, p e0211009 (2019) |
op_relation |
https://doi.org/10.1371/journal.pone.0211009 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0211009 https://doaj.org/article/87cc11743de24a8e92198cd187593530 |
op_doi |
https://doi.org/10.1371/journal.pone.0211009 |
container_title |
PLOS ONE |
container_volume |
14 |
container_issue |
7 |
container_start_page |
e0211009 |
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