TITLE:
Fractionation of Organic Carbon and Stock Measurement in the Sundarbans Mangrove Soils of Bangladesh
AUTHORS:
Sayada Momotaz Akther, Md Mahfuz Islam, Md Faruque Hossain, Zakia Parveen
KEYWORDS:
Carbon Sequestration, Carbon Sink, Carbon Source, Soil Organic Carbon Stock, Sundarbans Mangrove Forest
JOURNAL NAME:
American Journal of Climate Change,
Vol.10 No.4,
December
31,
2021
ABSTRACT: Mangrove soils are well known for their high capacity of storing organic carbon (SOC) in various pools; however, a relatively small change in SOC pools could cause significant impacts on greenhouse gas concentrations. Thus, for an in-depth understanding of SOC distribution and stock to predict the role of Sundarbans mangrove in mitigating global warming and greenhouse effects, different extraction methods were employed to fractionate the SOC of Sundarbans soils into cold-water (CWSC) and hot-water (HWSC) soluble, moderately labile (MLF), microbial biomass carbon (MBC), and resistant fractions (RF) using a newly developed modified-method. A significant variation in total SOC (p ?2 in 1 m soil profile and has an average of 31.80 kg·C·m?2. The substratum soils had more carbon than the upper layers in the Sundarbans wetland due to burial and preservation of carbon by frequent tidal inundation. A higher SOC stock in the soil profile and its primary association in resistant fractions suggested that Sundarbans mangrove soil is sequestering carbon and thereby serving as a significant carbon sink in Bangladesh.