(Table I-II) Station details and isopoda abundance of samples taken during POLARSTERN cruise ANT-XV/3 to the eastern Weddell Sea and King George Island

Abundance, diversity, and distribution of suprabenthic Isopoda caught from a water layer between 0.27 to 0.60 m above the seafloor were analysed. The samples were taken during the ANT XV/3 cruise on RV Polarstern by means of an epibenthic sledge along two transects in the southern Weddell Sea (Vestkapp and Halley Bay) and another one east of King George Island. At each of these three bathymetric transects, five to six stations were sampled between 200 and 2000 m. In total, 4258 specimens of isopods were sampled at 14 stations standardized to 1000 m2 hauls. 114 species were identified from 49 genera and 23 higher taxa (families and suborders) of Isopoda. Most of them belonged to the suborder Asellota. Dominant families are Munnopsididae (Eurycopinae, Ilyarachninae), Joeropsidae, Munnidae, Paramunnidae, Ischnomesidae and Desmosomatidae. No striking differences were found between areas (Vestkapp, Halley Bay, Kapp Norvegia, and Bransfield Strait). Overall isopod abundances were highest at the shallowest station; species richness was slightly higher above 1000 m depth.

本研究对采自海底上方0.27至0.60米水层的底上栖居等足目（Isopoda）的丰度、多样性与分布特征进行了分析。样本采集于ANT XV/3航次期间，由极星号（RV Polarstern）科考船搭载，通过底栖拖网（epibenthic sledge）在威德尔海南部的两条断面（韦斯特卡普与哈雷湾）以及乔治王岛东侧的一条断面开展取样。上述三条水深断面中，每条均设置了5至6个取样站位，取样水深区间为200至2000米。本研究共计在14个标准化为1000平方米拖网作业量的站位中采集到4258头等足目动物标本，从49个属、23个高级分类单元（科与亚目）中共鉴定出114个物种，其中绝大多数隶属于栉水虱亚目（Asellota）。优势类群包括平背水虱科（Munnopsididae，含宽水虱亚科（Eurycopinae）、伊利亚水虱亚科（Ilyarachninae））、乔氏水虱科（Joeropsidae）、穆诺水虱科（Munnidae）、副穆诺水虱科（Paramunnidae）、细身水虱科（Ischnomesidae）以及链结水虱科（Desmosomatidae）。各研究区域（韦斯特卡普、哈雷湾、挪威角（Kapp Norvegia）与布兰斯菲尔德海峡（Bransfield Strait））之间未观测到显著的群落差异。整体而言，等足目动物的丰度在最浅取样站位达到峰值；物种丰富度则在水深1000米以浅区域略高。