Impact of Environmental Factors on the Carbon Dynamics at Hooghly Estuarine Region

Abstract

Degradation of litter from mangrove forests adjacent to the creeks at Sagar Island of the Hooghly-Matla estuarine ecosystem is one of the principal sources of nutrient to the estuary. This system receives a major load of carbon from adjacent mangrove forest in the form of litterfall throughout the year. Keeping in view, the effect of environmental factor on the dynamics of carbon is studied through multivariate statistics. Essential environmental variables like soil carbon, dissolved carbon, temperature, salinity, pH, and dissolved oxygen are analyzed following standard protocol. Multivariate statistical analyses like correlation, regression, and centered PCA ordination are done in order to know the impact of environmental variables on carbon dynamics. The results reflect a close intercorrelation among the studied environmental variables and carbon. It also emphasizes the fact that soil and water temperature, and dissolved oxygen affect soil carbon dynamics, whereas salinity and pH of soil and water greatly regulate dissolved carbon dynamics. The variance pattern of these studied variables through seasons is also enumerated by PCA ordination studies.

Influence of physico-chemical parameters and pCO2 concentration on mangroves-associated polychaetes at Pichavaram, southeast coast of India

“…The principal component analysis, which was performed to set a well-defined distinction between environmental parameters and stations, revealed significant correlation for St-4 and St-5 with environmental parameters such as temperature, salinity, pH, saturation, wind speed, DO, alkalinity, CO3, DOC and sand, while stations St-1, St-2 and St-3 showed significant correlation with other environmental parameters. Similar variables' combinations were observed earlier by Medeiros et al [68] in eastern Canadian Arctic; Mukherjee et al [69] in Hooghly estuarine region; and Sigamani et al [50] in Vellar-Coleroon estuarine system.…”

Carbon and nitrogen dynamics in a tropical mangrove along the southwestern coast of India

“…The low availability of DO may lower the activity of microbes and detritivores and could be the reason for slightly lowered TIC values observed during the monsoon season. The low TIC values during the monsoon season due to variation in microbial activity were also previously reported in other Indian mangrove habitats (Mukherjee et al., 2014).…”

“…Mukherjee et al. (2014) suggested that an increase in DIC during pre‐monsoon is likely due to high community respiration. All these lines of evidence indicate that although mangrove ecosystems are net autotrophic, their water and sediments remain net heterotrophic due to the high OM turnover.…”