Abstract

At least 35 species of soil mites inhabit seashore biotopes of Shokalsky Island (73° N) in the Kara Sea, Arctic Ocean. Twenty-six Acari species, including seven dominants, have been registered on a model marine marsh profile near the Pereprava River, and their distribution in soil samples collected at three hypsometric levels was analyzed. The following parameters of the soil samples were determined: salinity, granulometric composition, carbon and nitrogen content, and condition of the plant cover. Overall, the species diversity and total abundance of mites increase from lower to higher marsh levels. CCA ordination made it possible to identify a significant correlation between the abundance of Ameronothrus nigrofemoratus, a typical mycetophagous littoral dweller, and the concentration of chlorides in the soil specimens. The distribution of Svalbardia paludicola, Scutacarus offaliensis, Steneotarsonemus arcticus, and two Arctoseius species is primarily determined by drainage properties of the substrate (these mites prefer sandy grounds). Mites abundant at the upper littoral level primarily depend either on the phytomass content (the majority of species) or on concentrations of the main biogenic elements (Nanorchestes cf. gilli, Eustigmaeus cf. tjumeniensis, and Cheilostigmaeus longisetosus) in the soil samples. The CCA ordination model explains 80.5% of the data dispersion. A comparative analysis of the species structure in mite communities shows that the assemblage inhabiting a high marsh level featuring a well-developed moss layer is the most diverse and distinct. Two acarocoenoses formed under plant associations occupying different marsh levels (ass. Puccinellietum phryganodis and ass. Caricetum subspathaceae) but on similar clayey grounds have the most similarity to each other. Apparently, this is due to the similar duration of seawater inundation periods determined by the drainage conditions.

中文翻译：

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环境因素对卡拉海Shokalsky岛沿海沼泽地土壤螨（Acari）组合形成的影响

摘要

北冰洋卡拉海的肖卡斯基岛（73°N）的海滨生物群落中至少栖息着35种土壤螨。在佩雷普拉瓦河附近的模型海洋沼泽地貌上登记了26种阿卡瑞物种，其中包括7个优势物种，并分析了它们在三种水压法收集的土壤样品中的分布。确定了土壤样品的以下参数：盐度，粒度组成，碳和氮含量以及植物覆盖状况。总体而言，螨的物种多样性和总丰度从较低到较高的沼泽水平增加。通过CCA排序，有可能发现黑线虫大量存在显着的相关性，典型的噬菌体沿海居民，以及土壤标本中氯化物的浓度。的分布Svalbardia paludicola，Scutacarus offaliensis，Steneotarsonemus arcticus，和两个Arctoseius物种主要由基板的排水性能（这些螨喜欢沙质理由）测定。沿海上层螨含量丰富，主要取决于植物中的植物含量（主要种类）或主要生物成因元素（Nanorchestes cf. gilli， Eustigmaeus cf. tjumeniensis和Cheilostigmaeus longisetosus）的浓度。）在土壤样品中。CCA排序模型可解释80.5％的数据分散。对螨类群落物种结构的比较分析表明，栖息在高沼泽水平，具有发达的苔藓层的组合是最多样化和独特的。在植物群落下形成的两种螨虫，具有不同的沼泽水平（Puccinellietum phryganodis和ass。Caricetum subspathaceae），但在相似的黏土上彼此最相似。显然，这是由于排水条件所决定的海水淹没期的持续时间相似。