Journal article
Epilithic algal communities in rivers of the Kolyma mountains, NE Siberia, Russia
Nova Hedwigia, v 63(3-4), pp 309-334
01 Jan 1996
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Epilithic algal communities were studied at 84 sites situated in 48 streams and rivers of the Kolyma Mountains; NE Siberia, Russia. The 62 most abundant algal species were mainly typical inhabitants of nutrient-poor, fast-flowing waters of mountainous and high-latitude regions. Canonical Correspondence Analysis showed that differences in the flow regimes of the rivers explained most of the variation in algal community composition. Species typical of initial successional stages dominated in the small streams of the continental part of the Mountains. Relatively stable flow conditions in the coastal and larger rivers allowed algal communities to reach more mature successional stages. Chemical properties of the water (pH and ionic content) also affected algal community structure. Tribonema spp., Tetraspora lubrica and Eunotia spp. preferred acidic streams. Diatoma hyemalis, Achnanthes subatomoides, Ceratoneis recta, Eunotia praerupta, and Audouinella pygmaea indicated extremely soft waters of granite areas. Achnanthes kryophila, A. laevis, Ceratoneis arcus var. linearis, Cymbella cistula, Diatoma tenuis, Gomphonema angustatum var. angustatum, G. angustatum var. productum, and Ulothrix tenuissima were more abundant in rivers with higher ionic content and draining slates. Pollution caused by gold-mining increased the abundance of algal species with preference of high ionic content and epipelic species, and eliminated algae typical for soft and slightly acidic waters. Algal biomass was governed mainly by substrate and flow stability, current velocity and water nutrient content. The lowest total biovolume was found in the main channels of the small continental streams, and the highest total biovolume in stable habitats (headwaters, side channels, lake outlets) and in moderately polluted rivers of the coastal area.
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Details
- Title
- Epilithic algal communities in rivers of the Kolyma mountains, NE Siberia, Russia
- Creators
- M Potapova
- Publication Details
- Nova Hedwigia, v 63(3-4), pp 309-334
- Publisher
- Gebruder Borntraeger
- Number of pages
- 26
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Diatom Herbarium
- Web of Science ID
- WOS:A1996VU16500003
- Other Identifier
- 991019296805004721
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- Plant Sciences