Khulna:The prevalence of top-dying disease in Sundari trees within the Sundarbans is gradually declining, while their capacity to store carbon has notably increased.
According to Bangladesh Sangbad Sangstha, a recent study reveals that the total carbon stored in Sundari trees has risen by 21 percent, equating to an increase of 1.4 million tonnes over the past forty years. Concurrently, the number of diseased Sundari trees has decreased by six percent, and the overall population of the species has grown by approximately 15 million, or five percent.
The top-dying disease, which leads to the death of the upper branches and leaves of the Sundari trees, has been a persistent ecological issue in the Sundarbans. Historical records indicate that the disease was first documented by British forestry expert RS Troup in 1921. The construction of the Farakka Barrage in the mid-1970s exacerbated the situation by reducing freshwater flow and increasing soil salinity, contributing to the disease's spread.
Professor Dr. Swapan Kumar Sarkar of Shahjalal University of Science and Technology highlighted the decline in the disease's prevalence compared to previous years. He emphasized the importance of continuous research and improved forest management to combat the disease, which plays a crucial role in maintaining the forest's structure and biodiversity.
Divisional Forest Officer Md Hasanur Rahman from the Sundarbans West Forest Division noted the significant reduction in the disease's prevalence, with Sundari seeds and seedlings being frequently observed. Similarly, Md Rezaul Karim Chowdhury of the Sundarbans East Forest Division reported an overall improvement in the forest's condition, despite some areas still being affected.
Forest Conservator Imran Ahmed confirmed the increase in carbon storage and the decline in the disease's prevalence. He stressed the necessity of ongoing research and evidence-based management to protect the Sundarbans' ecosystem.