2009: Diatoms of periphyton assemblages in small rivers in Northwestern Russia. Studi Trentini di Scienze Naturali

SummaRy -Diatoms of periphyton assemblages in small rivers in Northwestern Russia -The periphytic diatom flora of small rivers in north-western Russia was studied from 1997 to 2006. In total 386 diatom taxa were identified in 66 rivers. The majority of the taxa belonged to the genera Eunotia, Navicu...

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Bibliographic Details
Main Author: Sergey Komulaynen
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
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Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1077.6328
http://www2.muse.it/pubblicazioni/18/84/16.Komulaynen.pdf
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Summary:SummaRy -Diatoms of periphyton assemblages in small rivers in Northwestern Russia -The periphytic diatom flora of small rivers in north-western Russia was studied from 1997 to 2006. In total 386 diatom taxa were identified in 66 rivers. The majority of the taxa belonged to the genera Eunotia, Navicula, Cymbella and Achnanthes, and the most abundant species were Tabellaria fenestrata, Tabellaria flocculosa, Synedra ulna, Achnanthes minutissima, Eunotia pectinalis, Frustulia rhomboides, Cocconeis placentula, Cymbella affinis, Didymosphenia geminata, Gomphonema constrictum and Gomphonema parvulum. Taxonomic structure of periphyton displays a tendency for the concentration in a small number of genera and families. Coherently with the geographical location at the investigated area, the most abundant species are typical for oligotrophic, northern freshwater ecosystems. RIaSSunTo -Diatomee di comunità perifitiche in piccoli fiumi della Russia nord-occidentale -la flora a diatomee del perifiton di piccoli fiumi della Russia nord-occidentale è stata studiata dal 1997 al 2006. Complessivamente sono stati identificati 386 taxa di diatomee in 66 fiumi. la maggioranza di questi apparteneva ai generi Eunotia, Navicula, Cymbella e Achnanthes, e le specie più abbondanti erano le seguenti: Tabellaria fenestrata, Tabellaria flocculosa, Synedra ulna, Achnanthes minutissima, Eunotia pectinalis, Frustulia rhomboides, Cocconeis placentula, Cymbella affinis, Didymosphenia geminata, Gomphonema constrictum e Gomphonema parvulum. la struttura tassonomica del perifiton mostra una tendenza alla concentrazione dei taxa in un numero ristretto di generi e famiglie. Coerentemente con la collocazione geografica dell'area studiata, le specie più abbondanti sono tipiche di ecosistemi d'acqua dolce oligotrofici e nordici.