Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland
The effects of depth-related differences in environmental factors (pressure, hydrography, habitat and disturbance) on the benthic megafauna at the mouth of Kangerdlugssuaq Fjord in Arctic Greenland were investigated using a towed camera platform and autonomous underwater vehicle photographs. Large r...
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2007
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Online Access: | http://nora.nerc.ac.uk/id/eprint/149718/ http://www.informaworld.com/smpp/content~content=a781814248~db=all~order=page https://doi.org/10.1080/17451000701455287 |
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ftnerc:oai:nora.nerc.ac.uk:149718 2023-05-15T14:25:04+02:00 Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland Jones, D.O.B. Bett, B.J. Tyler, P.A. 2007-02 http://nora.nerc.ac.uk/id/eprint/149718/ http://www.informaworld.com/smpp/content~content=a781814248~db=all~order=page https://doi.org/10.1080/17451000701455287 unknown Jones, D.O.B. orcid:0000-0001-5218-1649 Bett, B.J. orcid:0000-0003-4977-9361 Tyler, P.A. 2007 Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland. Marine Biology Research, 3 (4). 191-204. https://doi.org/10.1080/17451000701455287 <https://doi.org/10.1080/17451000701455287> Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1080/17451000701455287 2023-02-04T19:34:52Z The effects of depth-related differences in environmental factors (pressure, hydrography, habitat and disturbance) on the benthic megafauna at the mouth of Kangerdlugssuaq Fjord in Arctic Greenland were investigated using a towed camera platform and autonomous underwater vehicle photographs. Large reductions in faunal density (60,132 to 1881 individuals ha-1) and increases in diversity (H'=0.93-2.54), through increases in richness (ES(220)=7.6-18.8) and reductions in dominance (Berger-Parker index=0.77-0.38) were found between 270 and 720 m water depth. Assemblages were separated into distinct shallow, intermediate and deep faunas by multivariate community analysis. In the shallower sites there were high levels of iceberg disturbance, directly reducing diversity as well as creating a complex, patchy environment inhabited by high densities of mobile suspension-feeding epifauna. In the deeper areas there was small-scale disturbance from the deposition of drop stones, but at a relatively low frequency and magnitude, which allowed increased species diversity. Proportions of deposit-feeding epifaunal and infaunal taxa rose with depth, as indicated by an increase with depth in faunal traces. Decreases in faunal density probably resulted from decreased food supply with depth. Article in Journal/Newspaper Arctic Arctic East Greenland Greenland Iceberg* Natural Environment Research Council: NERC Open Research Archive Arctic Greenland Marine Biology Research 3 4 191 204 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
The effects of depth-related differences in environmental factors (pressure, hydrography, habitat and disturbance) on the benthic megafauna at the mouth of Kangerdlugssuaq Fjord in Arctic Greenland were investigated using a towed camera platform and autonomous underwater vehicle photographs. Large reductions in faunal density (60,132 to 1881 individuals ha-1) and increases in diversity (H'=0.93-2.54), through increases in richness (ES(220)=7.6-18.8) and reductions in dominance (Berger-Parker index=0.77-0.38) were found between 270 and 720 m water depth. Assemblages were separated into distinct shallow, intermediate and deep faunas by multivariate community analysis. In the shallower sites there were high levels of iceberg disturbance, directly reducing diversity as well as creating a complex, patchy environment inhabited by high densities of mobile suspension-feeding epifauna. In the deeper areas there was small-scale disturbance from the deposition of drop stones, but at a relatively low frequency and magnitude, which allowed increased species diversity. Proportions of deposit-feeding epifaunal and infaunal taxa rose with depth, as indicated by an increase with depth in faunal traces. Decreases in faunal density probably resulted from decreased food supply with depth. |
format |
Article in Journal/Newspaper |
author |
Jones, D.O.B. Bett, B.J. Tyler, P.A. |
spellingShingle |
Jones, D.O.B. Bett, B.J. Tyler, P.A. Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland |
author_facet |
Jones, D.O.B. Bett, B.J. Tyler, P.A. |
author_sort |
Jones, D.O.B. |
title |
Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland |
title_short |
Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland |
title_full |
Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland |
title_fullStr |
Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland |
title_full_unstemmed |
Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland |
title_sort |
depth-related changes in the arctic epibenthic megafaunal assemblages of kangerdlugssuaq, east greenland |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/149718/ http://www.informaworld.com/smpp/content~content=a781814248~db=all~order=page https://doi.org/10.1080/17451000701455287 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic East Greenland Greenland Iceberg* |
genre_facet |
Arctic Arctic East Greenland Greenland Iceberg* |
op_relation |
Jones, D.O.B. orcid:0000-0001-5218-1649 Bett, B.J. orcid:0000-0003-4977-9361 Tyler, P.A. 2007 Depth-related changes in the Arctic epibenthic megafaunal assemblages of Kangerdlugssuaq, East Greenland. Marine Biology Research, 3 (4). 191-204. https://doi.org/10.1080/17451000701455287 <https://doi.org/10.1080/17451000701455287> |
op_doi |
https://doi.org/10.1080/17451000701455287 |
container_title |
Marine Biology Research |
container_volume |
3 |
container_issue |
4 |
container_start_page |
191 |
op_container_end_page |
204 |
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1766297496921833472 |