Biota and Environment of Natural Areas

Мakeeva Е.G., Barinova S.S.

The diversity and ecology of algae of water objects of the Trekhozerny brook basin (the Khakasskiy Nature Reserve, the Maly Abakan cluster)

Year: 2020, Number: 1, Pages: 5-38

For the first time, the species composition of algae from three mountain lakes and the Trekhozerny brook was studied. 210 species, varieties and forms of algae were identified, belonging to 98 genera, 57 families, 29 orders, 10 classes, 6 divisions. The basis of algoflora was Bacillariophyta (141 species and intraspecific taxon), Cyanoprokaryota (33), Streptophyta (16), Chlorophyta (15). Representatives of the families prevailed: Eunotiaceae (20 species, varieties and forms), Fragilariaceae (18), Cymbellaceae (17), Gomphonemataceae (12), Desmidiaceae (10), Achnanthidiaceae (10), Pinnulariaceae (9) and genera Eunotia (20 species, varieties and forms), Gomphonema (12), Encyonema (9), Pinnularia (8), Nitzschia (6), Stauroneis (6), Neidium (5), Aulacoseira (5). An environmental analysis of downstream communities in the basin revealed attached forms, indicators of high oxygen saturation with a high number of acidic water indicators and pH-indifferents, preferring slightly mineralized cold and low-temperature water, but with an increase in the share of heat-loving algae in lakes and subsequent increase cold loving in the streambed. Bioindication showed that the waters of the studied lakes and brook are clean, not contaminated with organic substances, oligo- and mesotrophic, inhabited by algae, preferring the photosynthetic type of nutrition. In general, ecosystems of the basin brook have a high diversity of algae, the indicator properties of which correspond to the values of a 1–2 water quality classes, of protected and undisturbed natural territories, and can serve as a benchmark for the subsequent monitoring of water objects of the Khakassky Reserve.

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