Abstract — Spatial and temporal changes in the species composition and structure of the fish community in one of the typical small rivers of Crimea have been evaluated. It is noted that the economic activity and changes in the water regime, which are mainly due to anthropogenic factors, have led to a more than fivefold increase in the number of fish species, the succession of dominant complexes, a decrease in the species similarity with native communities, and an increase in species diversity indices; the latter is most distinct in those areas where different forms of economic activity have led to the destruction of biotopes and replacement of the riffle zone by the pool zone.

中文翻译：

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以阿尔玛河为例的克里米亚山区河流鱼类群落结构和多样性动态

摘要 — 对克里米亚一条典型小河流中鱼类群落的物种组成和结构的时空变化进行了评估。值得注意的是，主要由于人为因素造成的经济活动和水情变化导致鱼类数量增加了五倍以上，优势复合体的演替，物种相似度下降土著社区，以及物种多样性指数的增加；后者在不同形式的经济活动导致生境破坏和浅滩区被水池区取代的地区最为明显。