Quantitative CO2 emissions from water -air interface in mangroves

Abstract

Mangroves are transition wetland located between land and sea. Mangrove ecosystems receive many
interactions on water flows and sediments between river and sea. This study was conducted to
determine the value of CO2 emissions from the water-air interface at the planted mangrove area of the
Ba Lat Mouth. The study results idicate that the CO2 emission from the water surface depends on the
tidal cycles, the tidal ranges and the seasons. Spring tides release more CO2 than the neap tides. The
larger the tidal range, the higher the CO2 emissions. The emission value in the wet season is higher than
in the dry season. The average CO2 emission value from water-air interface is 0.15 ± 0.03 MgC ha-1
year-1
. This value is 11.67 times lower than the amount emission from the sediment-air interface (1.75
MgC ± 0.76 ha-1
year-1
) in our published research in 2018 at the same location.
Keywords: CO2, emissions, mangroves, atmosphere.