Baryshev I A
Zh Obshch Biol. 2014 Mar-Apr;75(2):124-31.
Relying on own data (267 quantitative samples in total), factors of rheophilous zoobenthos formation in East Fennoscandia have been studied with use of detrended correspondence analysis. In the period from 2005 to 2011, in August, samples were taken from 90 stony rapids belonging to 39 streams. On East Fennoscandia territory, which extends over 1000 kilometers in south-north direction, climatic factor plays an important role in formation of macrozoobenthos in streams. With regard to both species composition and total abundance, the poorest benthic communities are found in tundra rivers in the northern part of the region. In limnetic-riverine systems of south Karelia, on the contrary, rheophilous macrozoobenthos is characterized by great number of species and high biomass. However, the structure of benthic communities is markedly influenced, beside the climate, by flowing lakes and settlements located in the catchment area. Under their influence, the species richness of zoobenthos in streams decreases while the biomass increases. Under the conditions of low trophic status that are indicative of northern water bodies, these sources of additional organic matter and biogenic elements improve feeding conditions for macrozoobenthic organisms which, in its turn, leads to biomass and production growth.
基于自身数据（总共267个定量样本），利用去趋势对应分析研究了东芬诺斯堪的亚地区喜流性底栖动物形成的因素。在2005年至2011年期间，于8月从属于39条溪流的90个石质急流处采集样本。在南北方向延伸超过1000公里的东芬诺斯堪的亚地区，气候因素在溪流大型底栖动物的形成中起着重要作用。就物种组成和总丰度而言，该地区北部苔原河流中的底栖生物群落最为贫乏。相反，在南卡累利阿的湖河系统中，喜流性大型底栖动物的特点是物种数量众多且生物量高。然而，除了气候之外，集水区内的流动湖泊和定居点对底栖生物群落的结构也有显著影响。在它们的影响下，溪流中底栖动物的物种丰富度降低而生物量增加。在表明北方水体的低营养状态条件下，这些额外的有机物质和生物成因元素来源改善了大型底栖生物的摄食条件，进而导致生物量和产量增长。
