Abstract

—During 79th cruise of R/V Akademik Mstislav Keldysh twelve trawl hauls were collected in Powell Basin and adjacent area at depths 370–3771 m. The structure of the benthic assemblages was highly variable when considered at the macrotaxon level. The main factors shaping the taxonomical structure of the sampled assemblages were depth, near-bottom current velocities and proportion of the hard fraction of the sediment. Hard substrate assemblages of the Antarctic peninsula slope and Philip Ridge with high percentage of filter-feeders (mainly sponges) were associated with the highest values of the near-bottom tide currents (up to 55.6 cm/s). In several trawl hauls indicator species of vulnerable marine ecosystems—mainly Demospongiae sponges, deep-sea corals Stylasteridae (Hydrozoa) and Primnoidae (Octocorallia)—were collected.

中文翻译：

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鲍威尔盆地的底栖组合

摘要

—在R / V Akademik Mstislav Keldysh的第79趟航行中在鲍威尔盆地及邻近地区，在370–3771 m的深度处收集了十二个拖网拖网。当在大分类群水平上考虑时，底栖组合的结构是高度可变的。决定采样组合分类结构的主要因素是深度，近底电流速度和沉积物中硬质组分的比例。南极半岛斜坡和菲利普·里德的坚硬底物组合以及较高的滤嘴（主要是海绵）与近底潮汐电流的最大值（最高55.6 cm / s）相关。在几个拖网拖曳中，收集了易受破坏的海洋生态系统的指示物种，主要是Demo海绵，深海珊瑚虎科（Hydrozoa）和and科（Octocorallia）。