Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica
The depth-related patterns in the benthic megafauna of the NE Weddell Sea shelf at the edge of the Fimbul Ice Shelf were investigated at seven sites using towed camera platform photographs. Megafaunal density decreased with depth from 77,939 ha?1 at 245 m to 8,895 ha?1 at 510 m. While diversity was...
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2007
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ftsouthampton:oai:eprints.soton.ac.uk:49482 2023-07-30T03:58:26+02:00 Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica Jones, D.O.B. Bett, B.J. Tyler, P.A. 2007-11 https://eprints.soton.ac.uk/49482/ http://www.springerlink.com/content/q82m102148g56j17/?p=521b496de7c94ca2a5c68a91260618c9&pi=7 unknown Jones, D.O.B., Bett, B.J. and Tyler, P.A. (2007) Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica. Polar Biology, 30 (12), 1579-1592. (doi:10.1007/s00300-007-0319-6 <http://dx.doi.org/10.1007/s00300-007-0319-6>). Article PeerReviewed 2007 ftsouthampton https://doi.org/10.1007/s00300-007-0319-6 2023-07-09T20:54:15Z The depth-related patterns in the benthic megafauna of the NE Weddell Sea shelf at the edge of the Fimbul Ice Shelf were investigated at seven sites using towed camera platform photographs. Megafaunal density decreased with depth from 77,939 ha?1 at 245 m to 8,895 ha?1 at 510 m. While diversity was variable, with H? ranging between 1.34 and 2.28, there were no depth related patterns. Multivariate analyses revealed two distinct assemblages; a shallow assemblage with dense patches of suspension feeders in undisturbed areas and a deep assemblage where these were not present. Disturbance from icebergs explained many observed patterns in faunal distribution. In shallow waters probable effects of disturbance were observed as changes in successional stages; in deeper waters changes in habitat as a result of past disturbance explained faunal distributions. In deeper areas ice ploughing created a mosaic landscape of fine and coarse sediments. Total megafaunal density was highest in areas of coarse sediment (up to 2.9 higher than in finer sediment areas) but diversity was highest in intermediate areas (H? = 2.35). Article in Journal/Newspaper Antarc* Antarctica Fimbul Ice Shelf Ice Shelf Polar Biology Weddell Sea University of Southampton: e-Prints Soton Weddell Sea Weddell Fimbul Ice Shelf ENVELOPE(-0.500,-0.500,-70.750,-70.750) Polar Biology 30 12 1579 1592 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The depth-related patterns in the benthic megafauna of the NE Weddell Sea shelf at the edge of the Fimbul Ice Shelf were investigated at seven sites using towed camera platform photographs. Megafaunal density decreased with depth from 77,939 ha?1 at 245 m to 8,895 ha?1 at 510 m. While diversity was variable, with H? ranging between 1.34 and 2.28, there were no depth related patterns. Multivariate analyses revealed two distinct assemblages; a shallow assemblage with dense patches of suspension feeders in undisturbed areas and a deep assemblage where these were not present. Disturbance from icebergs explained many observed patterns in faunal distribution. In shallow waters probable effects of disturbance were observed as changes in successional stages; in deeper waters changes in habitat as a result of past disturbance explained faunal distributions. In deeper areas ice ploughing created a mosaic landscape of fine and coarse sediments. Total megafaunal density was highest in areas of coarse sediment (up to 2.9 higher than in finer sediment areas) but diversity was highest in intermediate areas (H? = 2.35). |
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 to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica |
author_facet |
Jones, D.O.B. Bett, B.J. Tyler, P.A. |
author_sort |
Jones, D.O.B. |
title |
Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica |
title_short |
Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica |
title_full |
Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica |
title_fullStr |
Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica |
title_full_unstemmed |
Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica |
title_sort |
depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the fimbul ice shelf region, weddell sea, antarctica |
publishDate |
2007 |
url |
https://eprints.soton.ac.uk/49482/ http://www.springerlink.com/content/q82m102148g56j17/?p=521b496de7c94ca2a5c68a91260618c9&pi=7 |
long_lat |
ENVELOPE(-0.500,-0.500,-70.750,-70.750) |
geographic |
Weddell Sea Weddell Fimbul Ice Shelf |
geographic_facet |
Weddell Sea Weddell Fimbul Ice Shelf |
genre |
Antarc* Antarctica Fimbul Ice Shelf Ice Shelf Polar Biology Weddell Sea |
genre_facet |
Antarc* Antarctica Fimbul Ice Shelf Ice Shelf Polar Biology Weddell Sea |
op_relation |
Jones, D.O.B., Bett, B.J. and Tyler, P.A. (2007) Depth-related changes to density, diversity and structure of benthic megafaunal assemblages in the Fimbul ice shelf region, Weddell Sea, Antarctica. Polar Biology, 30 (12), 1579-1592. (doi:10.1007/s00300-007-0319-6 <http://dx.doi.org/10.1007/s00300-007-0319-6>). |
op_doi |
https://doi.org/10.1007/s00300-007-0319-6 |
container_title |
Polar Biology |
container_volume |
30 |
container_issue |
12 |
container_start_page |
1579 |
op_container_end_page |
1592 |
_version_ |
1772821230924070912 |