Ben thic Algae of the Freshwater Ecosystems of the Tiligulskiy Regional Landscape Park (Ukraine)*

摘要

Tiligulskiy Regional Landscape Park (TRLP) is a territory with well-preserved natural systems characterized by high diversity of flora and fauna. They are protected at both the national and international level. Its freshwater and floral component plays the major role in the functioning of the wetland park. The species diversity of benthic algae freshwater TRLP has been investigated. Investigations were carried out in 2013-2014 in fresh water areas included in the TRLP: lower reaches of the Tiligul River (near the village of Berezovka, sat Viktorovka and Kosovka), Big Tsaregol (near Tashino), Small Tsaregol (near Anatolyevka) Balaychuk (near Cairy), the flooded lakes (near villages Marianovka and Kosovka). There were 87 samples of phytobenthos collected in total on different substrates. Taxonomic and ecological geographical analyses of the identified species were made. We identified 180 species and infraspecific taxa of algae, which refer to 8 departments, 12 classes, 26 orders, 43 families and 77 genera. The greatest diversity of algal speices were found in larger bodies of water park (Tiligul River), and the smallest - were in small and quickly ephemeral waters (rivers Small Tsaregol and Balaychuk). These reservoirs are characterized by a diatomaceous-blue-green - green complex of species of phytobenthos. Ecological characteristics of the surveyed area are performed. Most of the identified species of algae are inhabitants of moderately polluted waters (mezosaprobs - 107, oligosaprobs - 12, izosaprob - 1), but the presence of 14 species of a-mezosaprobs indicates tense ecological situation in some waters. The whole structure of algal flora of the investigated waters characterizes them as the water mesosaprobic, standing-flowing, medium stronglymineralized, moderately alkaline.