Climate change, anthropogenic pressure, uncontrolled dredging, hydrological invention, pollution etc. are the main causes of biological diversity loss in Sundarban which is a UNESCO World Heritage Site. Please check the following links for more details.

http://takvera.blogspot.in/2013/01/mangrove-forests-threatened-by-climate.html

https://www.researchgate.net/publication/46574886_The_causes_of_deterioration_of_Sundarban_mangrove_forest_ecosystem_of_Bangladesh_conservation_and_sustainable_management_issues

Article The causes of deterioration of Sundarban mangrove forest eco...

Because nasty DJ robbed and stole crores of money in the name of project

Drone to Track Tigers and Check Encroachers in Sundarbans

http://m.gadgets.ndtv.com/science/news/drone-to-track-tigers-and-check-encroachers-in-sundarbans-731890

Dear Prosenjit

I partially agreed with the points pointed out by Dr. Gregor. The active part of the Bengal delta is doe to the continuous flow of the river Meghna. But it is under pressure due to the dam at Tepaimukh, Barakpur. The barrage at Farakkah has ceased water flow to the SMF. But we are missing one thing every time, the sediments they carry. Due to water flow and sediments the delta was active in the western coastal region, but due to Farakkah, we lost not only water but the valuable sediments that kept it alive. This make the western delta of Bangladesh dead!!

It resulted in the erosion of the SMF and subsequently the deforestation. You can see the article attached herewith.

Regards

Dear Dr. Gregor

Thanks a lot for your nice discussion. This is why RG is an important platform to discuss our issues!!

Dear Dr. Gregor and Dr. Ashfaque,

Thanks for excellent discussion on a very important but neglected issue. It is very difficult to explain any geo-environmental issue as discrete one. However, Those possible factors you have mentioned might have great possibility to be concomitant. I am always wondering about the conservation of the mangrove ecosystem of Bangladesh.

Thank you a lot for the discussion.