The Intergovernmental Panel on Climate Change (IPCC) estimates that by the year 2050, global CO2 emissions must be reduced by 85% from levels seen in 2000 to prevent a global mean temperature increase of 2°C. The proposed target fixed by the Govt. of India to reduce net greenhouse gas (GHG) emission intensity, includes the creation of an additional (cumulative) carbon sink of 2.5–3 GtCO2e through additional forest and tree cover by 2030 (Intended Nationally Determined Contribution INDC, 2015).
Quantification of GHG fluxes from the coastal wetlands under varying spatial and temporal conditions are still inconsistent in the Indian subcontinent as most of the studies use different methodologies. The East coast has been well studied and inventorized with respect to mangrove ecosystems, whereas there have been very sporadic studies from the west coast, thus making the comparison more challenging. There are no reported studies so far from Indian seagrass ecosystems related to GHG emissions. Hence, there is a strong need to assess the source/sink of GHGs using a universal methodology to elucidate the actual role of these unique ecosystems towards the release of GHGs and its impact on regional/ global climate change.