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“Ornithological eutrophication” as a source of allochthonous nutrient enrichment in Anavilundawa reservoir, Sri Lanka

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dc.contributor.author Gunaratne, A.M.
dc.contributor.author Jayakody, S.
dc.contributor.author Amarasinghe, U.S.
dc.date.accessioned 2016-01-11T06:00:22Z
dc.date.available 2016-01-11T06:00:22Z
dc.date.issued 2015
dc.identifier.citation Gunaratne, A.M., S. Jayakody and U.S. Amarasinghe (2015) “Ornithological eutrophication” as a source of allochthonous nutrient enrichment in Anavilundawa reservoir, Sri Lanka. International Review of Hydrobiology 100: 151-157. en_US
dc.identifier.uri
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/11106
dc.description.abstract Mass aggregation of waterfowls for breeding, results in allochthonous nutrient inputs intoaquatic systems. This study evaluated accumulation of bird droppings as allochthonusnutrient input and its fluctuations in Anavilundawa International Ramsar Sanctuary in SriLanka where Asian openbill (Anastomus oscitans) mass breeding occurs annually. Reservoirwas divided into four strata: Inlet, breeding ground, reservoir centre and outlet. The highestnutrients levels (NO3,PO43,NH4þ, alkalinity) and the lowest dissolved oxygen and pHlevels were recorded in breeding grounds for both surface and bottom water. The highestturbidity was recorded in inlet surface and centre bottom water. Canonical Variate Analysis ofwater quality parameters indicated the significantly distinct influence of ornithologicaleutrophication on surface water of four strata whilst, showing similarities in water quality ofbottom layers in inlet and outlet. In the breeding ground, surface water was covered with thickmats of aquatic flora consisting of Water hyacinth, Salvinia, duckweed and Polygonum.Therefore, it is concluded that in addition to dilution, amelioration of water quality could alsobe happening due to absorption by plants. Due to interactions between invasive plants andwaterfowls, restoration with native aquatic flora is needed to be considered to regain reservoirresilience and self-sustenance. en_US
dc.language.iso en en_US
dc.subject Asian openbill en_US
dc.subject Bird droppings en_US
dc.subject Nutrient loading en_US
dc.subject Tropical reservoirs en_US
dc.subject Water quality en_US
dc.title “Ornithological eutrophication” as a source of allochthonous nutrient enrichment in Anavilundawa reservoir, Sri Lanka en_US
dc.type Article en_US


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