Bioassessment of Selected Inland Water Bodies in Sri Lanka Using Benthic Oligochaetes with Consideration of Temporal Variations
✍ Scribed by Asoka Pathiratne; Ajith Weerasundara
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 171 KB
- Volume
- 89
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Abstract
The organic pollution status of three inland water bodies in Sri Lanka was evaluated using benthic oligochaete communities with the environmental characteristics considering temporal variation over one year period. Oligochaete species richness and abundance was consistently higher in the highly eutrophic and organically polluted Lake Beira in comparison with the less polluted water bodies. In a cluster analysis of oligochaete community compositions, the assemblages grouped by the water bodies rather than by months. Principal component analysis revealed that the structure of the oligochate community was mainly influenced by conductivity, nitrate, biochemical oxygen demand levels of water and organic carbon content of the sediment. In the ordination, the polluted Lake Beira separated from the other water bodies along the first axis. The results revealed that there could be a potential for using benthic oligochaetes for bioassessment of inland water bodies in Sri Lanka. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)