Emission of Nitrous Oxide, A Greenhouse Gas from Mangrove Wetlands in Subtropical Region

Project: Research

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The emission of greenhouse gases from natural and anthropogenic sources causing global warming is a major concern. Nitrous oxide (N2O) is a potent greenhouse gas, with a direct global warming potential 320 times as strong as that of carbon dioxide. The atmospheric N2O concentration is increasing exponentially. Microbial metabolism in marine ecosystems constitutes the principal source of N2O released into the atmosphere. Coastal areas have been recognized as major marine contributors to atmospheric nitrous oxide flux, and such contribution may be further enhanced by anthropogenic releases of nitrogenous wastes. Mangrove wetlands occupy a large percentage of tropical and subtropical coastlines and receive high levels of nitrogen, making them potentially significant sources of nitrous oxide. However, little is known about N2O emission from mangrove wetlands. This study aims to measure nitrous oxide flux and the quantity of its emission from mangrove wetlands, subject to varying degrees of pollution. The study will also attempt to understand the role of mangrove plants and associated micro-organisms in regulating N2O emission via nitrification and denitrification processes, how these processes are affected by abiotic factors, and how to reduce such emission when wetlands are used for sewage treatment.


Project number9041302
Grant typeGRF
Effective start/end date1/01/088/03/11