Diversity and Distribution Patterns in High Southern Latitude Sponges
Sponges play a key role in Antarctic marine benthic community structure and dynamics and are often a dominant component of many Southern Ocean benthic communities. Understanding the drivers of sponge distribution in Antarctica enables us to understand many of general benthic biodiversity patterns in...
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ftpubmed:oai:pubmedcentral.nih.gov:3404021 2023-05-15T14:05:26+02:00 Diversity and Distribution Patterns in High Southern Latitude Sponges Downey, Rachel V. Griffiths, Huw J. Linse, Katrin Janussen, Dorte 2012-07-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404021 http://www.ncbi.nlm.nih.gov/pubmed/22911840 https://doi.org/10.1371/journal.pone.0041672 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404021 http://www.ncbi.nlm.nih.gov/pubmed/22911840 http://dx.doi.org/10.1371/journal.pone.0041672 Downey et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2012 ftpubmed https://doi.org/10.1371/journal.pone.0041672 2013-09-04T10:32:53Z Sponges play a key role in Antarctic marine benthic community structure and dynamics and are often a dominant component of many Southern Ocean benthic communities. Understanding the drivers of sponge distribution in Antarctica enables us to understand many of general benthic biodiversity patterns in the region. The sponges of the Antarctic and neighbouring oceanographic regions were assessed for species richness and biogeographic patterns using over 8,800 distribution records. Species-rich regions include the Antarctic Peninsula, South Shetland Islands, South Georgia, Eastern Weddell Sea, Kerguelen Plateau, Falkland Islands and north New Zealand. Sampling intensity varied greatly within the study area, with sampling hotspots found at the Antarctic Peninsula, South Georgia, north New Zealand and Tierra del Fuego, with limited sampling in the Bellingshausen and Amundsen seas in the Southern Ocean. In contrast to previous studies we found that eurybathy and circumpolar distributions are important but not dominant characteristics in Antarctic sponges. Overall Antarctic sponge species endemism is ∼43%, with a higher level for the class Hexactinellida (68%). Endemism levels are lower than previous estimates, but still indicate the importance of the Polar Front in isolating the Southern Ocean fauna. Nineteen distinct sponge distribution patterns were found, ranging from regional endemics to cosmopolitan species. A single, distinct Antarctic demosponge fauna is found to encompass all areas within the Polar Front, and the sub-Antarctic regions of the Kerguelen Plateau and Macquarie Island. Biogeographical analyses indicate stronger faunal links between Antarctica and South America, with little evidence of links between Antarctica and South Africa, Southern Australia or New Zealand. We conclude that the biogeographic and species distribution patterns observed are largely driven by the Antarctic Circumpolar Current and the timing of past continent connectivity. Text Antarc* Antarctic Antarctic Peninsula Antarctica Macquarie Island South Shetland Islands Southern Ocean Weddell Sea Tierra del Fuego PubMed Central (PMC) Antarctic Antarctic Peninsula Kerguelen New Zealand South Shetland Islands Southern Ocean The Antarctic Weddell Weddell Sea PLoS ONE 7 7 e41672 |
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Research Article Downey, Rachel V. Griffiths, Huw J. Linse, Katrin Janussen, Dorte Diversity and Distribution Patterns in High Southern Latitude Sponges |
topic_facet |
Research Article |
description |
Sponges play a key role in Antarctic marine benthic community structure and dynamics and are often a dominant component of many Southern Ocean benthic communities. Understanding the drivers of sponge distribution in Antarctica enables us to understand many of general benthic biodiversity patterns in the region. The sponges of the Antarctic and neighbouring oceanographic regions were assessed for species richness and biogeographic patterns using over 8,800 distribution records. Species-rich regions include the Antarctic Peninsula, South Shetland Islands, South Georgia, Eastern Weddell Sea, Kerguelen Plateau, Falkland Islands and north New Zealand. Sampling intensity varied greatly within the study area, with sampling hotspots found at the Antarctic Peninsula, South Georgia, north New Zealand and Tierra del Fuego, with limited sampling in the Bellingshausen and Amundsen seas in the Southern Ocean. In contrast to previous studies we found that eurybathy and circumpolar distributions are important but not dominant characteristics in Antarctic sponges. Overall Antarctic sponge species endemism is ∼43%, with a higher level for the class Hexactinellida (68%). Endemism levels are lower than previous estimates, but still indicate the importance of the Polar Front in isolating the Southern Ocean fauna. Nineteen distinct sponge distribution patterns were found, ranging from regional endemics to cosmopolitan species. A single, distinct Antarctic demosponge fauna is found to encompass all areas within the Polar Front, and the sub-Antarctic regions of the Kerguelen Plateau and Macquarie Island. Biogeographical analyses indicate stronger faunal links between Antarctica and South America, with little evidence of links between Antarctica and South Africa, Southern Australia or New Zealand. We conclude that the biogeographic and species distribution patterns observed are largely driven by the Antarctic Circumpolar Current and the timing of past continent connectivity. |
format |
Text |
author |
Downey, Rachel V. Griffiths, Huw J. Linse, Katrin Janussen, Dorte |
author_facet |
Downey, Rachel V. Griffiths, Huw J. Linse, Katrin Janussen, Dorte |
author_sort |
Downey, Rachel V. |
title |
Diversity and Distribution Patterns in High Southern Latitude Sponges |
title_short |
Diversity and Distribution Patterns in High Southern Latitude Sponges |
title_full |
Diversity and Distribution Patterns in High Southern Latitude Sponges |
title_fullStr |
Diversity and Distribution Patterns in High Southern Latitude Sponges |
title_full_unstemmed |
Diversity and Distribution Patterns in High Southern Latitude Sponges |
title_sort |
diversity and distribution patterns in high southern latitude sponges |
publisher |
Public Library of Science |
publishDate |
2012 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404021 http://www.ncbi.nlm.nih.gov/pubmed/22911840 https://doi.org/10.1371/journal.pone.0041672 |
geographic |
Antarctic Antarctic Peninsula Kerguelen New Zealand South Shetland Islands Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Kerguelen New Zealand South Shetland Islands Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Macquarie Island South Shetland Islands Southern Ocean Weddell Sea Tierra del Fuego |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Macquarie Island South Shetland Islands Southern Ocean Weddell Sea Tierra del Fuego |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404021 http://www.ncbi.nlm.nih.gov/pubmed/22911840 http://dx.doi.org/10.1371/journal.pone.0041672 |
op_rights |
Downey et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0041672 |
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PLoS ONE |
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7 |
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7 |
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e41672 |
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