Diversity, Density & Nutrient lock up efficiency of Macrophytes in a Wetland of N.Bihar
Publication Date : 31/03/2016
Macrphytes are crucial for the functioning of aquatic ecosystem. They are involved in several feed back mechanisms. Their presence or absence reflects the nutrient status of the system. Greater amounts of nutrients, N, P, and K, in particular, provoke a high primary production, namely, eutrophication of aquatic ecosystems. The frequency, density and abundance of dominant macrophytes was done following Misra(1968). For calculating the nutrient accumulation per unit area the respective mean values for macrophytes were multiplied with the plant density. 28 plant species distributed in 26 genera in 18 families has been identified and documented. In terms of the number of species, emergent species constituted the largest(12) group, followed by rooted floating-leaved(5), free-floating(5), and submerged(6) species . The lock up efficiency of macrophytic components were also found high (metric tons) during study period - viz. (0.63) nitrogen, (0.019) phosphorus and (0.678) of potassium. However it showed a distinct variation throughout the year and it was found to be in direct correlation with the density.
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