The study concerns the relationships between taxonomic, functional and phylogenetic diversity of benthic invertebrates inhabiting watercourses and abiotic parameters associated with excessive nutrients load (concentration of Kjejdahl nitrogen, nitrates, phosphorus, organic carbon and dissolved oxygen, values of BOD5 and electrolytic conductivity). The research used data on the species composition of leeches, molluscs and larval forms of odonates and chironomid dipterans. Their description using mathematical functions allowed to determine whether the diversity reaches maximal values at extreme or moderate values of nutrients enrichment. In most cases, statistically significant relationships were unimodal—the highest diversity was observed at intermediate values of nutrients content and associated parameters, however the different patterns of relationships, monotonic and inverse quadratic, were also observed. Indirect impacts of nutrients enrichment on diversity were found as the most significant relationships. Significant responses of functional diversity were clearer and stronger than responses of taxonomic and phylogenetic diversity. The identification of fauna to the species level allowed for obtaining precise results that could enable selection of appropriate parameters for effective assessment of environmental degradation.

该研究涉及栖息于水道的底栖无脊椎动物的分类学、功能和系统发育多样性与与过度营养负荷相关的非生物参数（Kjejdahl 氮、硝酸盐、磷、有机碳和溶解氧的浓度、BOD5 值和电解电导率）之间的关系。该研究使用了有关水蛭、软体动物和齿形动物和摇蚊双翅目幼虫的物种组成的数据。他们使用数学函数的描述允许确定多样性是否在营养丰富的极端或中等值时达到最大值。在大多数情况下，统计上显着的关系是单峰的——在营养素含量和相关参数的中间值处观察到最高的多样性，然而，也观察到了不同的关系模式，单调和逆二次方。发现营养物质丰富对多样性的间接影响是最重要的关系。功能多样性的显着响应比分类学和系统发育多样性的响应更清晰和更强。动物群在物种水平上的识别能够获得精确的结果，从而能够选择适当的参数来有效评估环境退化。