ABSTRACT We studied how ecological factors affect species composition and structure of soil algal assemblages in different types of mountain tundra and sparse forests in the Northern Urals. Soil moisture, pH, nitrogen content and amount of solar radiation were determined using Ellenberg indicator values from phytoindicators. Species identification of soil algae was made using light microscopy following algal culture. We identified 74 algal species from five divisions. Most species were Cyanobacteria and Chlorophyta. For each habitat type we identified species with high frequency and fidelity. Algal species diversity was maximal in herbaceous plant communities, minimal in lichen communities, and showed a positive correlation with soil moisture and nitrogen content.

中文翻译：

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生态因子对乌拉尔北部不同类型山地苔原和疏林土壤藻类的影响

摘要 我们研究了生态因素如何影响乌拉尔北部不同类型的山地苔原和稀疏森林中土壤藻类组合的物种组成和结构。土壤水分、pH 值、氮含量和太阳辐射量是使用植物指标的 Ellenberg 指标值确定的。土壤藻类的鉴定是在藻类培养后使用光学显微镜进行的。我们从五个部门确定了 74 种藻类。大多数物种是蓝藻和绿藻。对于每种栖息地类型，我们以高频率和高保真度确定了物种。藻类物种多样性在草本植物群落中最大，在地衣群落中最小，并且与土壤水分和氮含量呈正相关。