Citation:Jayawardhana, W.M.P. and Amarasinghe, M.D. 2003. Structure of macrophyte communities in a freshwater wetland and their relative capacity of Nitrogen retention. Proceedings of the 10th Annual Scientific sessions of the Sri Lanka Association for Fisheries and Aquatic Resources, Sri Lanka Association for Fisheries and Aquatic Resources, Colombo, Sri Lanka. (Abstract) p.12.