Abstract：
Protecting rivers and lakes from pollution is crucial for maintaining the health of aquatic ecosystems and ensuring the well-being of both wildlife and humans. Present study intends to examine the water quality of the Suna River (Eastern Fennoscandia in the European North of Russia) to assess the ecological risk. Widespread methods for assessing water quality based on macrozoobenthos and phytoperiphoton were applied. It was found that in conditions of ultra-fresh waters with high humus content, biotic indicators may indicate pollution of water bodies that do not actually experience significant anthropogenic impact. Ratings ranging from \'poor\' to \'excellent\' were obtained for different stations, reflecting the influence of natural features of different sections of the river. \'Good\' water quality was noted at the river stones biotopes. In river gravel, sand and silt biotopes, as well as all lake biotopes, \'mediocre\' water quality was found. The low anthropogenic income on the river catchment allows us to conclude that most indices for assessing water quality significantly underestimate the results in the natural conditions of Eastern Fennoscandia. Biotic indices EPT, BBI and EBI are most accurate for assessing the water quality of rivers and lakes in Eastern Fennoscandia.
摘要：
保护河流和湖泊免受污染对于维持水生生态系统的健康和确保野生动物和人类的福祉至关重要。本研究旨在检查苏纳河（俄罗斯北部欧洲的Fennoscandia东部）的水质，以评估生态风险。应用了基于大型底栖动物和植物周子的广泛评估水质的方法。发现在腐殖质含量高的超淡水条件下，生物指标可能表明水体的污染实际上没有受到重大的人为影响。不同电台的评级从“差”到“优”不等，反映了河流不同部分的自然特征的影响。河石生物群落的水质良好。在河流砾石中，沙子和淤泥生物群落，以及所有湖泊生物群落，发现水质“平庸”。河流流域的人为收入较低，这使我们得出结论，大多数用于评估水质的指数都大大低估了Fennoscandia东部自然条件下的结果。生物指数EPT，BBI和EBI对于评估Fennoscandia东部河流和湖泊的水质最准确。
