Physicochemical variables of aquatic environments are the main factors that influence aquatic organism distributions. In the present study, we aimed to assess the relationship between environmental variables and dytiscid assemblages in different aquatic basins of Mongolia. In total, 4193 diving beetle specimens of 66 species belonging to 15 genera were collected from 146 sites under various environmental and ecological conditions. Clear differences were observed in species richness and community composition among surveyed basins, subbasins, and habitat types. Environmental variables, particularly altitude and dissolved oxygen, exerted a strong influence on dytiscid communities in subbasins of the country. This large-scale study is the first to examine the relationship between dytiscids and their natural habitats in Mongolia at a species level, and it provides useful baseline information for future studies that aim to understand the factors that affect dytiscid communities.

水生环境的理化变量是影响水生生物分布的主要因素。在本研究中，我们旨在评估蒙古不同水生盆地中环境变量与dyscids组合之间的关系。在不同的环境和生态条件下，共从146个地点收集了来自19个属的66个物种的4193个潜水甲虫标本。在被调查的盆地，亚盆地和生境类型之间，物种丰富度和群落组成存在明显差异。环境变量，特别是海拔高度和溶解氧，对该国次流域的非生物群落产生了很大的影响。这项大规模研究是首次在物种层面上研究dydycids及其在蒙古自然栖息地之间的关系，