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Item Microbial biofilms and mitigation of loss of agro-biodiversity in degraded soils(NSF:Colombo, 2017-09) Herath, L.; Seneviratne, G.; Jayasinghe, J.W.W.; Senanayake, D.M.N.Item Current status of vertebrate diversity in anthropogenic and natural ecosystems in south-western Sri Lanka(NSF. Colombo, 2011) Gamage, S.N.; Weerakoon, D.K.; Gunawardena, A.Item Plant diversity and soil characteristics of the Ussangoda serpentine site(NSF. Colombo, 2011) Weerasinghe, H.A.S.; Iqbal, M.C.M.Item Humid tropical ecosystems. changes, challenges, opportunities(NSF. Colombo, 2011) Gunatilleke, I.A.U.N.Item New biosphere reserves from India, with special reference to Agasthyamalai(National Science Foundation:Colombo, 2003) Rai, R.K.Item Ecological aspects of weed flora in an irrigated rice field ecosystem at Bathalagoda in Sri Lanka(National Science Foundation:Colombo, 2002) Bambaradeniya, C.N.B.; Gunatilleke, C.V.S.Item Gillnet selectivity of Ompok bimaculatus (Siluridae) and Puntius dorsalis (Cyprinidae) in a small-scale riverine fishery(Natural Resources Energy Science Autority:Colombo, 1997) Amarasinghe, U.S.; Pushpalatha, K.B.C.Item Eco-cultural diversity embedded in the cultural landscape:an approach to biosphere reserve management(National Science Foundation:Colombo, 2003) Ramakrishnan, P.S.Item Studies on the population structure of zooplankton in the Kotmale reservoir(National Science Foundation:Colombo, 1998) Piyasiri, S.; Chandrananda, W.P.N.Plankton samples were collected from Kotmale reservoir, at approxiinatelynionthly in tervals from. August 1990 to August 1991. Investigations were focused on species composition, seasonal variation, vertical and horizontal distribution and the size class distribution in the population structure of' zooplankton. Two species of cyclopoids, two species of calanoids,, nine species of' cladocerans and sixteen species of rotifers were recorded. Among these, the most abundant species duringthe study period were Mesocyclops sp., Phyllodiaptoin tts anime. Ceriodal-Vint'a cormita, Keratella troplea, Filina longiseta, Brachi(MIS caudatus and Tricocerce sinulis. A location at the deepest region of the reservol I' closer to the dam was selected as a representative station to investigate ffic vertical distribution of zooplankton. At this location, the vertical distribution patterns of all the zooplankton were almost similar throughout the year. As this location is situated at the down stream region of the river, it was expected to contain most of the zooplankton of the reservoir. The horizontal distribution of' zooplankton did not show much variation. The nauplii stages and cyclopolds showed hio-hest abundance In the population of zooplankton. However, during most of the months, the adult stages of calanoids and cladocerans were highly abundant