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Effects of hydrological regimes and limnological parameters on plankton community properties in tropical irrigation reservoirs: A Sri Lankan case study

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dc.contributor.author Weerakoon, S. N.
dc.contributor.author Chandrasekara, W. U.
dc.contributor.author Amarasinghe, U. S.
dc.date.accessioned 2022-11-01T06:56:28Z
dc.date.available 2022-11-01T06:56:28Z
dc.date.issued 2021
dc.identifier.citation Weerakoon, S. N., Chandrasekara, W. U., & Amarasinghe, U. S. (2021). Effects of hydrological regimes and limnological parameters on plankton community properties in tropical irrigation reservoirs: A Sri Lankan case study. Lakes &Amp; Reservoirs: Science, Policy and Management for Sustainable Use, 26(3). https://doi.org/10.1111/lre.12369 en_US
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/25462
dc.description.abstract Water-level fluctuations are reported to be key processes influencing ecosystem structure and functions in lentic aquatic ecosystems such as reservoirs. The plankton community structure in reservoirs, being useful mon1toring tools as reservoir trophic status indicators, are influenced by water quality parameters and water-level fluctuations. The present study tested the hypothesis that plankton community properties in irrigation reservoirs are influenced by hydrological regimes and physical and chemical parameters. Accordingly, the effects of physical, chemical and hydrological parameters on plankton density and taxa richness were Investigated for 10 selected irrigation reservoirs of Sri Lanka. The relative reservoir level fluctuation (RRLF), an index of the magnitude of water-level fluctuation In relation to mean depth, had a positive influence on phytoplankton density. Because the RRLF positively influenced phytoplankton density, this index appeared to favour eutrophy in reservoirs. Canonical correspondence analysis (CCA) indicated both the phytoplankton and zooplankton community structure in the study reservoirs was influenced by physical and chemical characteristics. CCA also indicated the plankton taxa abundance and water quality parameters could be used for the trophic classification of irrigation reservoirs. The results of the present study highlight the need for examining attributes based on hydrological regimes in the context of reservoir water quality management. en_US
dc.publisher Lakes & Reservoirs en_US
dc.subject physicochemical parameters, plankton community, relative reservoir level fluctuation, taxa richness, tropical reservoirs en_US
dc.title Effects of hydrological regimes and limnological parameters on plankton community properties in tropical irrigation reservoirs: A Sri Lankan case study en_US


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