Order of the National Green Tribunal (Eastern Zone Bench, Kolkata) in the matter of Tribunal on its own Motion regarding Sunderbans Forests Vs Union of India and Ors dated 04/03/2015 regarding construction of houses on the mudflats of the river Matla under the Gitanjali Scheme of Housing. The Applicant has alleged that its causing illegal encroachment on the mangrove area of Sunderban forest and also causing violation of the CRZ regulations in Sunderban Biosphere Reserve.
Relative abundance and Shannon-Weiner species diversity index of true mangrove species were estimated in 10 sampling stations of Indian Sundarbans during 2013. The mangrove patches in the selected stations were categorized into a 4-point scale depending on the values of Shannon-Weiner species diversity index. The health of the mangrove forest as per our constructed 4-point scale was found to be regulated primarily by anthropogenic factors, although in station like Sagar South, the natural erosion may be the key player in determining the mangrove floral diversity.