Impact of Climate Change on the Sundarbans and Its Medicinal Plants

The Sundarbans, a vast mangrove forest spanning across 10,000 square kilometers in Bangladesh and India, serves as a vital ecosystem and shelter for diverse wildlife, including the iconic Royal Bengal tiger and saltwater crocodiles. With nearly 2.7 million people residing in the coastal districts near this forest in Bangladesh alone, the Sundarbans plays a crucial role in the lives of its surrounding communities, particularly as a source of food, firewood, and traditional medicine.

The Role of Kabiraj in Local Healthcare

For centuries, local communities have relied on the knowledge of kabiraj, traditional healers who provide medical care when formal healthcare services may be limited or costly. Their remedies, derived from various leaves, roots, and bark, are passed down through generations, reflecting a deep understanding of the local flora. A 2011 research study in the Barisal Division revealed that nearly one-third of the rural households in the coastal region sought aid from kabiraj or other similar healers.

Environmental Challenges: Rising Salinity and Cyclones

However, the Sundarbans is facing critical challenges due to climate change. Rising sea levels and frequent cyclones are increasing salinity levels in coastal ecosystems. Between 2017 and 2021, the salinity of tidal waters rose from 21 to 33 parts per thousand during the pre-monsoon season, while soil salinity spiked by an alarming 31 percent.

Mangrove species have varying degrees of salt tolerance, and some, like the Sundari (Heritiera fomes), are showing troubling signs of decline. Other vital plants, such as Bain (Avicennia officinalis), which is significant for bee nectar, have ceased flowering in various areas, jeopardizing the availability of medicinal plants that kabiraj depend on.

Observations from the Forest

Suranjan, a local healer, shares his concerns about the noticeable absence of some plant species. As he observes the landscape, he notes the shifting conditions: “Before, the forest remained dry during high tides, but now it submerges completely. The saltwater has caused many trees to die.” This change threatens the medicinal plants he traditionally uses, such as hogla (Typha), which is employed in treating cuts and burns, and bain, known for its medicinal properties and nectar.

Suranjan recalls how, after Cyclone Aila in 2009, the saltwater invasion devastated his family’s medicinal plants, leaving them unable to provide for the community as they once did. Professor Md Abdur Rahim from Sher-e-Bangla Agricultural University emphasizes the consequences of rising salinity: “Salt is gradually transforming the forest. While hardy plants may survive, the delicate healing species are fading away.”

A Season Without Flowers

In a nearby locality, villagers gather at a tea stall beside the Shakbaria River, a hub for sharing news and stories. On a recent visit, Chapal Raptan, a honey collector, expressed his dismay: “This should be the season for bain flowers, but this year, none have bloomed.” His statement reflects a shared concern among local men about the unexpected lack of these blossoms, which represent not just a poor honey yield but a dramatic shift in their familiar environment.

As Suranjan lists other medicinal plants that are becoming scarce, such as neem and ashwagandha, he acknowledges the impact on his practice: “Collecting these plants is becoming increasingly difficult. Without the necessary medicines, I cannot provide timely care to my patients.”

Conclusion

The Sundarbans is not only an ecological treasure but also the lifeblood for many communities that depend on its resources. As climate change poses serious threats to this unique ecosystem, the very fabric of traditional medicine and the well-being of local populations hang in the balance.