The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach
In order to reveal the structure of the sparsely known deeper sublittoral hard bottom communities of glacial Kongsfjorden the macroepibenthos from six depth zones (30m - 200m) was analysed. A total 180 still images derived from six hours‘ video recorded at the Kongsfjordneset remotely operated vehic...
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ftawi:oai:epic.awi.de:24599 2024-09-15T17:50:59+00:00 The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach Laudien, Jürgen Orchard, Julia-Berenice 2012-01-20 https://epic.awi.de/id/eprint/24599/ https://hdl.handle.net/10013/epic.39643 unknown SPRINGER Laudien, J. orcid:0000-0003-2663-4821 and Orchard, J. B. (2012) The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach , Polar Biology, 35 (7), pp. 1057-1072 . hdl:10013/epic.39643 EPIC3Polar Biology, SPRINGER, 35(7), pp. 1057-1072, ISSN: 0722-4060 Article isiRev 2012 ftawi 2024-06-24T04:02:42Z In order to reveal the structure of the sparsely known deeper sublittoral hard bottom communities of glacial Kongsfjorden the macroepibenthos from six depth zones (30m - 200m) was analysed. A total 180 still images derived from six hours‘ video recorded at the Kongsfjordneset remotely operated vehicle station were assessed quantitatively. Overall 27 mainly suspension-feeding species/taxa were observed. Of these, two-thirds have an arcto-boreal distribution while the remainder are cosmopolitan. The overall mean epibenthos abundance was 33 ind. m-2 with maximum values at 150m depth (97.9 ind. m-2). The majority of the taxa inhabited the entire depth range. Encrusting red algae, an unidentified sponge and the sea anemone Urticina eques characterized the assemblage of the shallow zone. The sea anemones Hormathia spp. were important below 30m, the Serpulid polychaete Protula tubularia was characteristic for the community below 50m, and the demosponge Haliclona sp. was a key taxon between 100m and 200m depth. Cluster analysis and non-metrical multidimensional scaling based on abundance data showed differences between the assemblages along the bathymetric gradient, but only in the shallower depths in relation to the substratum surface incline. As surface and tidal current impacts attenuate with increasing depth, there is a gradual trend from robust key species towards more fragile ones (i.e. Protula tubularia), in line with the ‘Physical control hypothesis’. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Polar Biology Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In order to reveal the structure of the sparsely known deeper sublittoral hard bottom communities of glacial Kongsfjorden the macroepibenthos from six depth zones (30m - 200m) was analysed. A total 180 still images derived from six hours‘ video recorded at the Kongsfjordneset remotely operated vehicle station were assessed quantitatively. Overall 27 mainly suspension-feeding species/taxa were observed. Of these, two-thirds have an arcto-boreal distribution while the remainder are cosmopolitan. The overall mean epibenthos abundance was 33 ind. m-2 with maximum values at 150m depth (97.9 ind. m-2). The majority of the taxa inhabited the entire depth range. Encrusting red algae, an unidentified sponge and the sea anemone Urticina eques characterized the assemblage of the shallow zone. The sea anemones Hormathia spp. were important below 30m, the Serpulid polychaete Protula tubularia was characteristic for the community below 50m, and the demosponge Haliclona sp. was a key taxon between 100m and 200m depth. Cluster analysis and non-metrical multidimensional scaling based on abundance data showed differences between the assemblages along the bathymetric gradient, but only in the shallower depths in relation to the substratum surface incline. As surface and tidal current impacts attenuate with increasing depth, there is a gradual trend from robust key species towards more fragile ones (i.e. Protula tubularia), in line with the ‘Physical control hypothesis’. |
format |
Article in Journal/Newspaper |
author |
Laudien, Jürgen Orchard, Julia-Berenice |
spellingShingle |
Laudien, Jürgen Orchard, Julia-Berenice The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach |
author_facet |
Laudien, Jürgen Orchard, Julia-Berenice |
author_sort |
Laudien, Jürgen |
title |
The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach |
title_short |
The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach |
title_full |
The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach |
title_fullStr |
The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach |
title_full_unstemmed |
The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach |
title_sort |
significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial kongsfjorden (svalbard, arctic) - an underwater imagery approach |
publisher |
SPRINGER |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/24599/ https://hdl.handle.net/10013/epic.39643 |
genre |
Arctic Kongsfjord* Kongsfjorden Polar Biology Svalbard |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Polar Biology Svalbard |
op_source |
EPIC3Polar Biology, SPRINGER, 35(7), pp. 1057-1072, ISSN: 0722-4060 |
op_relation |
Laudien, J. orcid:0000-0003-2663-4821 and Orchard, J. B. (2012) The significance of depth and substratum incline for the structure of a hard bottom sublittoral community in glacial Kongsfjorden (Svalbard, Arctic) - an underwater imagery approach , Polar Biology, 35 (7), pp. 1057-1072 . hdl:10013/epic.39643 |
_version_ |
1810292795012808704 |