Composition and abundance of epibenthic-sledge catches in the South Polar Front of the Atlantic
Composition and abundance of epibenthic-sledge catches in the South Polar Front of the Atlantic
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DOI：
10.1016/j.dsr2.2014.08.017
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发表时间：
2014-10-01
影响因子：
3
通讯作者：
Wuerzberg, L.
中科院分区：
文献类型：
--
作者：
Brandt, A.;Havermans, C.;Wuerzberg, L.
在大西洋南极锋沿着的七个不同深海站部署了一个海底雪橇，以探索大型底栖生物的组成和丰度，并确定这一向南大洋过渡的过渡区中最丰富的分类群。在2012年南半球夏季的ANT-XXVIII/3考察期间，通过北极星号考察船上的EBS总共采集了3，130个样本。底栖和上底栖甲壳动物发生的样本中最常见的。其中，桡足类的数量最多，有1,585个标本，其次是等足类（236个），端足类（103 ind.），Tanaidacea（78 id.）和Cumacea（50 id.）。环节动物是由属于不同的多毛类分类群（404 id.）的大量标本。软体动物区系明显以双壳类（255 id.）为主，其次是腹足纲（Gastropoda，47 id.）。沿南极锋沿着取样的深海底栖生物丰度低得令人吃惊，与该地区表面生产力很高形成对比。不同大型底栖动物类群的标本数量，特别是近节甲壳类的标本数量，远远超过了威德尔海高纬度地区的南大洋标本数量。(C)2014爱思唯尔有限公司版权所有。
An epibenthic sledge (EBS) was deployed at seven different deep-sea stations along the South Polar Front of the Atlantic in order to explore the composition and abundance of macrofaunal organisms and to identify the most abundant taxa in this transition zone to the Southern Ocean. In total 3,130 specimens were sampled by means of the EBS on board of RV Polarstern during the expedition ANT-XXVIII/3 in the austral summer of 2012. Benthic and suprabenthic Crustacea occurred to be most frequent in the samples. Among those, copepods were by far most numerous, with 1,585 specimens followed by the peracarid taxa Isopoda (236 ind.), Amphipoda (103 ind.), Tanaidacea (78 id.) and Cumacea (50 id.). Annelida were represented by a high number of specimens belonging to different polychaete taxa (404 id.). The molluscan fauna was clearly dominated by Bivalvia (255 id.), followed in numbers of specimens by Gastropoda (47 id.). The deep-sea benthos sampled along the Southern Polar Front occurred in surprisingly low abundances, contrasting the largely high surface productivity of the area. Numbers of specimens across different macrofaunal taxa and especially of peracarid crustaceans underscored by far those from South Ocean sites at higher latitudes in the Weddell Sea. (C) 2014 Elsevier Ltd. All rights reserved.