An appraisal of carbon capture and sequestration in few selected wetlands of West Bengal

Subir Kumar Nag (), Bandana Das Ghosh (), U. K. Sarkar () and B. K. Das ()
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Subir Kumar Nag: ICAR-Central Inland Fisheries Research Institute
Bandana Das Ghosh: ICAR-Central Inland Fisheries Research Institute
U. K. Sarkar: ICAR-Central Inland Fisheries Research Institute
B. K. Das: ICAR-Central Inland Fisheries Research Institute

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2024, vol. 26, issue 2, No 57, 4229-4244

Abstract: Abstract Wetlands provide numerous ecological and economic services to mankind. The soils of wetlands are one of the largest sinks of carbon (C) among the terrestrial ecosystems and can play an important role in offsetting the emission of C as a greenhouse gas (GHG) to the atmosphere. India is bestowed with enriched wetland ecosystems that support diverse and unique habitats. The potential of the wetlands in terms of C capture and sequestration has not been quantified. Therefore, in the present paper, an assessment of C capture from different sources and its ultimate deposition in soils leading to sequestration has been done in three different types of wetlands, one created sewage-fed and two natural floodplain oxbow lakes, in the West Bengal state of India. Multiple seasonal sampling of water, macrophytes, and soil was done to assess the primary productivity, dissolved C, and deposition of C in soils of the wetlands in comparison to reference upland sites. All these wetlands are productive ecosystems as indicated by the physicochemical parameters of water and soil. The quantity of C accumulated up to 0.3 m depth in the oxbow lakes was to the tune of 144–166 Mg/ha, which was 3.43–4.78 times higher than that in the corresponding reference upland sites. In the sewage-fed wetland, the C accumulation estimated as 50 Mg/ha was 1.27 times higher than its corresponding upland site. So, the wetland ecosystems, particularly the floodplains, are highly efficient in accumulating C in their soils and thus can somewhat negate the GHG emission.

Keywords: Wetlands; Carbon; Climate change; West Bengal (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s10668-022-02881-8

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