Carlson’s Trophic State Index of Shatiya Wetland in Gopalganj District of Bihar

Abstract

Wetlands are vulnerable ecosystems and under-valued despite their high utility to environment and economy which tells about emphasis on their management and conservation. The efficient wetland management requires monitoring of trophic status especially in summer season. Shatiya wetland located in North Bihar is currently under excess anthropogenic pressure. This study was assessed to monitor trophic status in terms of Carlson Index. The study confirmed mesotrophic status in through chlorophyll a presence in initial investigation possibly caused by low input of chemical fertilizers around wetland. However, the trophic status showed a move towards eutrophy in the last stage of study indicated anthropogenic pressure on the wetland was initiating its shrinkage and ultimately conservation must be prioritized.