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Zoogeography of the Antarctic ascidian fauna in relation to the sub-Antarctic and South America


Primo, C and Vazquez, E, Zoogeography of the Antarctic ascidian fauna in relation to the sub-Antarctic and South America, Antarctic Science, 19, (3) pp. 321-336. ISSN 0954-1020 (2007) [Refereed Article]

DOI: doi:10.1017/S0954102007000521


This study of the relationships between the Antarctic, sub-Antarctic and South America biogeographical regions used both existing and new data. We constructed a presence/absence matrix of 237 species for 27 biogeographical divisions which included the Amsterdam-Saint Paul and Tristan da Cunha islands. Species and areas were classified using cluster analysis combined with MDS ordination. Six main groups were obtained from the species classification: 1) Amsterdam-Saint Paul, and 2) Tristan da Cunha species, 3) species from the Macquarie Province, 4) species from the sub-Antarctic Region, 5) Antarctic species and species distributed in the cold regions, 6) South American species. The biogeographical components were dominated by the endemic (although it is not as high as in other groups), Antarctic-South America and Southern Hemisphere elements. Except for Amsterdam-Saint Paul, Tristan da Cunha and Bouvet, the areas considered were grouped together with Macquarie being rather related to New Zealand regions. We speculate that the Antarctic Region may have acted as an "evolutionary incubator", providing a centre of origin for sub-Antarctic and South American ascidians. © 2007 Antarctic Science Ltd.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Evolutionary biology
Research Field:Biogeography and phylogeography
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Primo, C (Dr Carmen Primo Perez)
ID Code:57498
Year Published:2007
Web of Science® Times Cited:27
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2009-07-22
Last Modified:2009-09-21

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