Persistent Organic Pollutants in the Coastal and Estuarine Regions Adjoining the Indian Periphery of the Bay of Bengal

Basu, Suman; Chanda, Abhra; Das, Sourav; Bhattacharyya, Subarna

doi:10.1007/978-3-030-68980-3_7

Cited by 1 publication

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“…Thus, all these observations show that, in the longer run, heavy-metal pollution can be responsible for the decline in the blue carbon content of this ecosystem. Besides heavy metals, the Indian Sundarban mangroves exhibit significant polluting signatures of persistent organic pollutants; however, most studies focused on the sediment and biotic communities within the mangrove ecosystems [ 137 ]. Research focusing exclusively on the ill impacts of these pollutants on the photosynthetic carbon assimilation potential of the mangrove stands should expedite the development of a holistic understanding of this issue.…”

Section: Anthropogenic Disturbances and Coastal Pollutionmentioning

confidence: 99%

Challenges towards the Sustainability and Enhancement of the Indian Sundarban Mangrove’s Blue Carbon Stock

Chanda,

Akhand

2023

Life

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The Sundarban is the world’s largest contiguous mangrove forest and stores around 26.62 Tg of blue carbon. The present study reviewed the factors causing a decline in its blue carbon content and poses a challenge in enhancing the carbon stock of this region. This review emphasized that recurrent tropical cyclones, soil erosion, freshwater scarcity, reduced sediment load into the delta, nutrient deficiency, salt-stress-induced changes in species composition, mangrove clearing, and anthropogenic pollution are the fundamental drivers which can potentially reduce the total blue carbon stock of this region. The southern end of the Ganges–Brahmaputra–Meghna Delta that shelters this forest has stopped its natural progradation due to inadequate sediment flow from the upper reaches. Growing population pressure from the north of the Sundarban Biosphere Reserve and severe erosion in the southern end accentuated by regional sea-level rise has left minimal options to enhance the blue carbon stock by extending the forest premises. This study collated the scholarly observations of the past decades from this region, indicating a carbon sequestration potential deterioration. By collecting the existing knowledge base, this review indicated the aspects that require immediate attention to stop this ecosystem’s draining of the valuable carbon sequestered and, at the same time, enhance the carbon stock, if possible. This review provided some key recommendations that can help sustain the blue carbon stock of the Indian Sundarban. This review stressed that characterizing the spatial variability of blue carbon with more sampling points, catering to the damaged trees after tropical cyclones, estuarine rejuvenation in the upper reaches, maintaining species diversity through afforestation programs, arresting coastal erosion through increasing sediment flow, and combating marine pollution have become urgent needs of the hour. The observations synthesized in this study can be helpful for academics, policy managers, and decision makers willing to uphold the sustainability of the blue carbon stock of this crucial ecosystem.

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Section: Anthropogenic Disturbances and Coastal Pollutionmentioning

confidence: 99%