Composition, abundance and distribution of peracarida from the Southern Ocean deep sea
Composition, abundance and distribution of peracarida from the Southern Ocean deep sea
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DOI：
10.1016/j.dsr2.2007.07.014
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发表时间：
2007-01-01
影响因子：
3
通讯作者：
Brandt, Angelika
中科院分区：
文献类型：
--
作者：
Broekeland, Wiebke;Choudhury, Madhumita;Brandt, Angelika
桡足类是深海动物和南极大陆架已知动物的重要组成部分。显示了在ANDEEP I-III考察期间获得的表层底栖动物雪橇样品的近干旱组成，并与其他深海盆地和南极大陆架的组成进行了比较。端足类是样品中最丰富的类群，占所有近有孔虫个体的43%，其次是等足类（35%），Cumacea（16%），Tanaidacea（5%）和Mythalacea（1%）。在较浅的站点发现了最高丰度，但无法证实丰度随深度下降的明显趋势。虽然端足类数量随深度的减少和等足类数量随深度的增加一般对应于其他区域，例如，在安哥拉盆地，南大洋深海似乎是特殊的，在中等深度窝藏更多的片足类动物标本，从而反映了南极大陆架的情况。从标本数量上看，最突出的是来自鲍威尔盆地133-2号站的标本，该站位于约1500米深处，标本数量最多，而来自布兰斯菲尔德海峡152-6号站的标本数量却少得惊人，尽管该站的深度约为2000米。(c)2007爱思唯尔有限公司保留所有权利。
Peracarida are an important component of both the deep-sea fauna and the fauna known from the Antarctic shelf. The peracarid composition from epibenthic-sledge samples obtained during the expeditions ANDEEP I-III is shown and compared to that of other deep-sea basins and the Antarctic shelf. The Amphipoda were the most abundant taxon in the samples, with 43% of all peracarid individuals, followed by the Isopoda (35%), Cumacea (16%), Tanaidacea (5%) and Mysidacea (1%). Highest abundances were found at the shallower stations, but a clear trend towards decreasing abundances with depth could not be confirmed. Although the decrease of amphipod numbers and the increase of isopod numbers with depth in general correspond to other areas, e.g., the Angola Basin, the Southern Ocean deep sea seems to be special by harboring more amphipod specimens at medium depths, thus reflecting the situation on the Antarctic shelf. Outstanding by their number of specimens were the samples from station 133-2 at about 1500 in depth in the Powell Basin, which contained the highest number of specimens, and from station 152-6 in the Bransfield Strait, where the number of specimens was strikingly low despite the moderate depth of about 2000m. (c) 2007 Elsevier Ltd. All rights reserved.