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首页> 外文期刊>Russian journal of marine biology >The Distribution of Macrozoobenthos Taxa, as Potential Indicators of Vulnerable Marine Ecosystems in the Western Bering Sea: 1. Anadyr Bay Area
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The Distribution of Macrozoobenthos Taxa, as Potential Indicators of Vulnerable Marine Ecosystems in the Western Bering Sea: 1. Anadyr Bay Area

机译：大白带分类群的分布，作为白令海西部脆弱海洋生态系统的潜在指标：1.阿纳德尔湾地区

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摘要

The composition of common species in some macrozoobenthos groups that are considered as potential indicators of vulnerable marine ecosystems (VME), in the Anadyr Bay area, Bering Sea have been determined based on the results of four benthic surveys using a benthic grab sampler (1985, 2005) and a bottom trawl (2008, 2012). These are soft corals (Gersemia rubiformis), sponges (Myxilla incrustans, Halichondria panicea, and Semisuberites cribrosa), ascidians (Halocynthia aurantium and Boltenia ovifera), bryozoans (Cystisella saccata and Flustra foliacea), barnacles (Chirona evermanni), and the brittle star (Gorgonocephalus eucnemis). The distribution of these animals has been mapped. Aggregations of immobile sestonophages (the former five groups) are formed on hard coarse-grained and mixed sediments in waters with higher hydrodynamic activity (along the southwestern and northeastern coasts of the Anadyr Bay, mainly at depths of 80-90 m). In some cases, sponges and bryozoans in the southern part of the area can descend to a depth of 250 m (in the Navarin Canyon). The mobile filterer G. eucnemis forms aggregations mainly on soft sediments in the central part of Anadyr Bay, at depths of 50-270 m, in the area of a localized spot of near-bottom cold water. According to the results of trawl surveys conducted in 2008 and 2012, the mean biomass of the sponges, the brittle star G. eucnemis, and the sea squirt B. ovifera did not change, whereas the mean biomass of the barnacle Ch. evermanni and sea peach H. aurantium decreased by 6.5 and 3.7 times, respectively. Since the level of trawl fishing activity in the region is not high, the hypothesis has been proposed that the decrease in the abundance of the latter two species is presumably caused by the natural dynamics of their population or can be related to the factor of randomness, as these species are caught in their mosaically distributed local aggregations.
机译：根据使用底栖生物取样器进行的四次底栖生物调查的结果，确定了白令海阿纳德尔湾地区某些被认为是脆弱海洋生态系统（VME）潜在指标的大型动物群中常见物种的组成（1985年， 2005年）和底拖网（2008年，2012年）。这些是软珊瑚（Geremia rubiformis），海绵（Myxilla incrustans，Halichondria panicea和Semisuberites cribrosa），海生动物（Halocynthia aurantium和Boltenia ovifera），bryozoans（Cystisella saccata and Flustra floliacea）和barnacle （Gorgonocephalus eucnemis）。这些动物的分布图已经绘制出来。在具有较高水动力活动的水中（沿阿纳德尔湾的西南和东北海岸，主要在80-90 m的深度），坚硬的粗颗粒和混合沉积物上形成了固定的噬菌体（前五类）的聚集体。在某些情况下，该地区南部的海绵和苔藓虫可下降至250 m的深度（在纳瓦林峡谷中）。移动过滤器G. eucnemis主要在Anadyr湾中部近底部冷水局部区域的软沉积物中形成聚集体，深度为50-270 m。根据2008年和2012年的拖网调查结果，海绵，脆性恒星G. eucnemis和海鞘B. ovifera的平均生物量没有变化，而藤壶Ch。的平均生物量却没有变化。 evermanni和海桃H. aurantium分别下降了6.5和3.7倍。由于该地区的拖网捕鱼活动水平不高，因此提出了以下假设：后两种物种的丰度下降可能是由于其种群的自然动态造成的，或者可能与随机性因素有关，因为这些物种陷入了镶嵌分布的局部聚集中。

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