Impact of untreated sewage and thermal effluent discharges on the air-sea CO 2 fluxes in a highly urbanized tropical coastal region

Various biotic and abiotic factors regulate carbon dioxide (CO ) absorption and emission in coastal waters. Factors controlling the regional air-sea CO fluxes were studied in Tuticorin Bay, a highly urbanized region along the southeast coast of India. Significant spatial heterogeneity in the distrib...

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Bibliographic Details
Published inMarine pollution bulletin Vol. 175; p. 113166
Main Authors Muthukumar, C, Balasubramaniyan, S, Garlapati, Deviram, Bharathi, M Durga, Kumar, B Charan, James, R A, Ramu, K, Ramanamurthy, M V
Format Journal Article
LanguageEnglish
Published England 01.02.2022
Subjects
Carbon Cycle
Carbon Dioxide - analysis
India
Sewage
India
Carbon cycle
Tuticorin
Metabolic balances
Thermal pollution
Eutrophication
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Summary:Various biotic and abiotic factors regulate carbon dioxide (CO ) absorption and emission in coastal waters. Factors controlling the regional air-sea CO fluxes were studied in Tuticorin Bay, a highly urbanized region along the southeast coast of India. Significant spatial heterogeneity in the distribution of inorganic carbon components in the bay was observed based on the exposure to different anthropogenic pressures. Thermal effluent discharges made the south zone of the bay a strong CO source by enhancing heterotrophy. Untreated sewage discharges in the middle zone mediated eutrophic conditions leading to strong autotrophy and restricting the zone as a weak source of CO Irrespective of the anthropogenic stressors, biological processes dominated the air-sea CO fluxes in the Tuticorin Bay. The results indicated that micro-level studies are needed in understanding the carbon cycle in environments with multiple anthropogenic stressors.
ISSN:1879-3363