Species diversity and distribution within the deep-sea nematode genus Acantholaimus on the continental shelf and slope in Antarctica
Species diversity and distribution within the deep-sea nematode genus Acantholaimus on the continental shelf and slope in Antarctica
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DOI：
10.1007/s00300-006-0124-7
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发表时间：
2006-09-01
期刊：
影响因子：
1.7
通讯作者：
Vanreusel, Ann
中科院分区：
文献类型：
--
作者：
De Mesel, Ilse;Lee, Hee Joong;Vanreusel, Ann
在威德尔海（Kapp Norvegia和Vestkapp）和南极半岛附近（Drake Passage和Bransfield Strait）的陆架和陆坡（182- 2，009 in）调查了鱼属的物种多样性和分布--与地理、水深和环境特征的关系。在大陆架上出现的高密度和多样性的典型深海鱼属是南大洋的一个独特特征。在我们的研究区，共鉴定出55种（形态型）的海蛞蝓，其中39种在陆架上发现。与典型的深海群落相似，鱼群落的特点是有大量的同类物种和许多稀有物种。有14个物种的分布范围从陆架延伸到下斜坡。高度的地方和区域多样性是显而易见的，并提出了相当程度的特有性。叶绿素a浓度的负面影响，反映了浮游植物的可用性，被发现对鱼密度和物种多样性。
Species diversity and distribution-in relation with biogeography, bathymetry and environmental characteristics-within the genus Acantholaimus were investigated on the shelf and slope (182-2,009 in) in the Weddell Sea (Kapp Norvegia and Vestkapp) and near the Antarctic Peninsula (Drake Passage and Bransfield Strait). The occurrence of the otherwise typical deep-sea genus Acantholaimus in high densities and diversity on the continental shelf is a unique feature of the Southern Ocean. Fifty-five Acantholaimus species (morpho-types) were distinguished in our study area, of which 39 were found on the shelf. The Acantholaimus communities were characterised by a high number of congeneric species and the presence of many rare species, similar to typical deep-sea communities. Fourteen species had a distribution extending from the shelf to the lower slope. High local and regional diversity was obvious and a considerable level of endemism was suggested. A negative impact of chlorophyll a concentrations, reflecting the availability of phytoplankton, was found on the Acantholaimus densities and species diversity.