期刊
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
卷 108, 期 -, 页码 69-75出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.dsr2.2014.08.017
关键词
South Atlantic; Southern Ocean; Deep sea; Macrofaunal abundance; Taxon composition
类别
资金
- German Science Foundation [Br 1121/43-1]
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.
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