Structure and biodiversity of megabenthos in the Weddell and Lazarev Seas (Antarctica): ecological role of physical parameters and biological interactions

被引:125
作者
Gutt, J [1 ]
Starmans, A [1 ]
机构
[1] Alfred Wegener Inst Polar & Marine Res, D-27568 Bremerhaven, Germany
关键词
D O I
10.1007/s003000050300
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
A community analysis of the mega-zooepibenthos at water depths between 99 and 1243 m was carried out for the Weddell and Lazarev Seas (47 degrees W 77 degrees S-12 degrees E 70 degrees S). A total of 144,531 specimens were counted and 313 taxa were identified from 3,768 photographs at 55 stations, which represented approximately 3,304 m(2) of seafloor. The stations were classified into six groups according to their inventory of taxa although they represented rather a gradient from a rich and diverse suspension feeder assemblage to a poorer assemblage. In the latter, the proportion of deposit feeders was higher than in the former. A statistical comparison between biological and physical data showed that the faunistic pattern could best be explained by a combination of water depth and a geographical gradient. A positive correlation between the abundance of large sponges and the number of all other taxa was found.
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页码:229 / 247
页数:19
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