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The structure and distribution of phytoperiphyton community in the Teno River and its tributaries (Finnish Lapland)

Communiuties of attached algae (phytoperiphyton) from the Teno River and its tributaries were studied and their floristic composition and spatial distribution were analysed. A total of 215 taxa from 49 locations were identified. Attached algae communities, characteristic of oligotrophic waters, prevailed in the studied streams. Diatoms, dominated by typical attached forms such as Tabellaria flocculosa, Synedra ulna, Achnanthes minutissima, Eunotia pectinalis and Cymbella affinis, were most common and abundant. However, the bulk of biomass (0.8–42.9 g m–2) was formed mainly by the filamentous green algae Zygnema, Bulbochaete and Oedogonium.