ISSN (print) 0868-8540, (online) 2413-5984
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Algologia 2009, 19(4): 412–422
Applied Algology

The isolation of autotrophic benthos indicator species of Sterlitamak city watercourse (Russia)

Nikitina O.A., Shkundina F.B.
Abstract

The certain methods of floristic classification are used to isolate the autotrophic benthos indicator species in the watercourse of Sterlitamak during the observation period form September 2005 to April 2008. In the waters of the Belaya, Ashkhadar, Sterlya, Olhovka rivers and in the water spring 267 species and infraspecific taxa of algae were identified, belonging to 88 genera, 28 orders, 13 classes and 7 divisions. Considering the saprobic zones of alga and cyanoprokaryotes, the two groups of waters were identified. The first group included the Belaya, Ashkhadar and Sterlya rivers, where β-mesosaprobes were dominating; the second group included the Olhovka River with the water spring, where oligosaprobes were dominating. During the treatment of algae, 3 communities and 3 variants were found. The community Achnanthes lanceolataPinnularia viridis included species (28) prevalent in the Belaya, Ashkhadar and Sterlya rivers. It combined cyanobacterial-algal coenosis formed in the areas of anthropogenic degradation. Within the community the 3 variants are identified: 1. Aphanothece elabens (22 species), prevalent in the Belaya River; 2. Trachelomonas hispida – in the Ashkhadar River (19); 3. Phacus pyrum in the Sterlya River (10). The communities Navicula lacustrisAmphora ovalis var. gracilis (13 species) form the Olhovka River and Cyclotella bodanica – Gyrosigma attenuatum (13 species) form the water spring included the species prevalent in cooler, fast flowing water on the small depth.

Keywords: cyanobacterial-algal coenosis, autotrophic benthos, Sterlitamak city, watercourse, biological indicators, floristic classification

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