Preface; D. Harper, K.M. Mavuti. Introduction. The Lake Naivasha Management Plan: consensus-building to conserve an international gem; Lord A. Enniskillen. Towards an understanding of human impact upon the hydrology of Lake Naivasha, Kenya; R. Becht, D.M. Harper. The physical attributes of the Lake Naivasha catchment rivers; M. Everard, et al. Geochemical and physical characteristics of the river and lake sediments at Naivasha, Kenya; H. Tarras-Wahlberg, et al. Aspects of the biodiversity of the rivers in the Lake Naivasha catchment; M. Everard, et al. Chemical charateristics, with particular reference to phosphorus, of the rivers draining into Lake Naivasha, Kenya; N. Kitaka, et al. Phosphorus inputs to Lake Naivasha, Kenya, from its catchment and the trophic state of the lake; N. Kitaka, et al. Magnetic susceptibilities of lake sediment and soils on the shoreline of Lake Naivasha, Kenya; R.R. Boar, D.M. Harper. Phytoplankton community structure and succession in the water column of Lake Naivasha, Kenya: a shallow tropical lake; D.S. Hubble, D.M. Harper. Nutrient control of phytoplankton production in Lake Naivasha, Kenya; D.S. Hubble, D.M. Harper. Impacts of the C4 sedge Cyperus papyrus L. on carbon and water fluxes in an African wetland; M.B. Jones, S.W. Humphries. The dynamics and ecology of exotic tropical species in floating plant mats: Lake Naivasha, Kenya; C.S. Adams, et al. Organochlorine and organophosphorus pesticide concentrations in water, sediment, and selected organisms in Lake Naivasha, (Kenya); S.M. Gitahi, et al. Feeding of the exotic Louisianan red swamp crayfish, Procambarus clarkii (Crustacea, Decapoda), in an African tropical lake: Lake Naivasha, Kenya; A.C. Smart, et al. Distribution and abundance of the Louisianan red swamp crayfish, Procambarus clarkii Girard at Lake Naivasha, Kenya between 1987 and 1999; D.M. Harper, et al. Population structure and secondary productivity of Limnodrilus hoffmeisteri (Clarapede) and Branchiura sowerbyi Beddard in the profundal zone of Lake Naivasha, Kenya; P. Raburu, et al. Population changes in sympatric Great and Long-tailed Cormorants (Phalacrocorax carbo and P. africanus): the effects of niche overlap or environmental change?; R. Brooks, et al. Population fluctuations and their causes in the African Fish Eagle (Haliaeetus vocifer (Daudin)) at Lake Naivasha, Kenya; D.M. Harper, et al. The status and future of the Lake Naivasha fishery, Kenya; P. Hickley, et al. Towards the sustainability of the Lake Naivasha Ramsar site and its catchment; M. Everard, D.M. Harper.