Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica
In 2004 as part of the joint Latitudinal Gradient Project in the Ross Sea, cruises of RV Tangaroa and RV Italica along the Victoria Land coast and the Balleny Islands collected 142 species of mollusc (four Polyplacophora, 99 Gastropoda, 37 Bivalvia and two Scaphopoda). About 20% of these species rep...
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Online Access: | http://dx.doi.org/10.1017/s0954102006000654 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000654 |
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crcambridgeupr:10.1017/s0954102006000654 2024-09-15T17:42:37+00:00 Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica Schiaparelli, Stefano Lörz, Anne-Nina Cattaneo-Vietti, Riccardo 2006 http://dx.doi.org/10.1017/s0954102006000654 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000654 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 18, issue 4, page 615-631 ISSN 0954-1020 1365-2079 journal-article 2006 crcambridgeupr https://doi.org/10.1017/s0954102006000654 2024-08-07T04:03:54Z In 2004 as part of the joint Latitudinal Gradient Project in the Ross Sea, cruises of RV Tangaroa and RV Italica along the Victoria Land coast and the Balleny Islands collected 142 species of mollusc (four Polyplacophora, 99 Gastropoda, 37 Bivalvia and two Scaphopoda). About 20% of these species represent new records for the Ross Sea quadrant. The species richness was found to be higher at 71–72°S (Cape Hallett–Cape Adare) and lower at 74–75°S (Terra Nova Bay–Cape Russell) using Shannon-Wiener's H', Pielou's J' and Simpson's λ indices, as well as by using species richness estimators (e.g. ICE, Chao 2, Jack 2). The Balleny Islands (65–67°S), though not exhaustively sampled, show diversity values comparable to those of Terra Nova Bay–Cape Russell. These islands, located in the main Antarctic Coastal Current, appear to represent a crossroads in the Southern Ocean, with mollusc and other invertebrate species present, that have previously been recorded only from the Weddell Sea. The higher diversity in the Cape Hallett–Cape Adare area is not easy to interpret, but could be a result of the intense iceberg scouring off the two capes, observed from seafloor mapping, a factor that is known to enhance species diversity at the regional scale. The existence of a decreasing trend in diversity towards higher latitudes along the Victoria Land coast cannot yet be shown, due to the large gaps in sampling coverage. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Balleny Islands Iceberg* Ross Sea Southern Ocean Victoria Land Weddell Sea Cambridge University Press Antarctic Science 18 4 615 631 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
In 2004 as part of the joint Latitudinal Gradient Project in the Ross Sea, cruises of RV Tangaroa and RV Italica along the Victoria Land coast and the Balleny Islands collected 142 species of mollusc (four Polyplacophora, 99 Gastropoda, 37 Bivalvia and two Scaphopoda). About 20% of these species represent new records for the Ross Sea quadrant. The species richness was found to be higher at 71–72°S (Cape Hallett–Cape Adare) and lower at 74–75°S (Terra Nova Bay–Cape Russell) using Shannon-Wiener's H', Pielou's J' and Simpson's λ indices, as well as by using species richness estimators (e.g. ICE, Chao 2, Jack 2). The Balleny Islands (65–67°S), though not exhaustively sampled, show diversity values comparable to those of Terra Nova Bay–Cape Russell. These islands, located in the main Antarctic Coastal Current, appear to represent a crossroads in the Southern Ocean, with mollusc and other invertebrate species present, that have previously been recorded only from the Weddell Sea. The higher diversity in the Cape Hallett–Cape Adare area is not easy to interpret, but could be a result of the intense iceberg scouring off the two capes, observed from seafloor mapping, a factor that is known to enhance species diversity at the regional scale. The existence of a decreasing trend in diversity towards higher latitudes along the Victoria Land coast cannot yet be shown, due to the large gaps in sampling coverage. |
format |
Article in Journal/Newspaper |
author |
Schiaparelli, Stefano Lörz, Anne-Nina Cattaneo-Vietti, Riccardo |
spellingShingle |
Schiaparelli, Stefano Lörz, Anne-Nina Cattaneo-Vietti, Riccardo Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica |
author_facet |
Schiaparelli, Stefano Lörz, Anne-Nina Cattaneo-Vietti, Riccardo |
author_sort |
Schiaparelli, Stefano |
title |
Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica |
title_short |
Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica |
title_full |
Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica |
title_fullStr |
Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica |
title_full_unstemmed |
Diversity and distribution of mollusc assemblages on the Victoria Land coast and the Balleny Islands, Ross Sea, Antarctica |
title_sort |
diversity and distribution of mollusc assemblages on the victoria land coast and the balleny islands, ross sea, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1017/s0954102006000654 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000654 |
genre |
Antarc* Antarctic Antarctic Science Antarctica Balleny Islands Iceberg* Ross Sea Southern Ocean Victoria Land Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Balleny Islands Iceberg* Ross Sea Southern Ocean Victoria Land Weddell Sea |
op_source |
Antarctic Science volume 18, issue 4, page 615-631 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102006000654 |
container_title |
Antarctic Science |
container_volume |
18 |
container_issue |
4 |
container_start_page |
615 |
op_container_end_page |
631 |
_version_ |
1810489251750477824 |