A Study On Plankton Diversity Along With Conservation Status Of Jhagra Beel, Dhubri, Assam, India
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Abstract
The study aimed to understand the diversity of plankton and conservation status of Jogra beel, located in the Dhubri district of Assam. The research spanned one year, from April, 2017 to May, 2018. Plankton samples were collected in the morning, between 6:00 AM and 8:00 AM, by passing 100 liters of water through standard plankton net with a mesh size of 70 microns (µ). We used Past software to analyze the collected samples. The study revealed a high diversity of phytoplankton, including Chlorophycae, Cyanophycae, Flagellates, Euglenophycae, Bacilariophycae, and Dianoflagelates. Additionally, zooplankton, consisting of protozoans, Rotifers, Copepoda, and Cladocera, were also present. The diversity analysis, which included Margalef's D index, Shannon-Weiner index, and Simpson's index of diversity, indicated that the monsoon season had the highest diversity compared to other seasons. Furthermore, phytoplanktons were most dominant during the premonsoon season. Despite the rich diversity of plankton populations, the beel is facing multiple threats, including pollution, encroachment, overexploitation and improper disposal of medical waste. To address these challenges, it is essential to rigorously enforce protection laws and raise awareness among local communities. Additionally, promoting alternative livelihoods, such as developing the site into an ecotourism destination, could contribute to the preservation of Jhagra Beel.
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