CO2 dynamics on three habitats of mangrove ecosystem in Bintan Island, Indonesia

Global Colloquium on GeoSciences and Engineering 2017

Dharmawan, I.W.E.^1

Marine Life Conservation Unit, Biak-Papua, Indonesian Institute of Sciences, Jalan Bosnik Raya, Kab. Biak-Numfor, Papua

98111, Indonesia^1

关键词: Atmospheric carbon dioxide;    Global warming and climate changes;    Litter decomposition;    Mangrove ecosystems;    Mangrove habitats;    Quantitative study;    Soil characteristics;    Species composition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/118/1/012049/pdf
DOI  :  10.1088/1755-1315/118/1/012049

来源: IOP

【 摘 要 】

Atmospheric carbon dioxide (CO2) has increased over time, implied on global warming and climate change. Blue carbon is one of interesting options to reduce CO2concentration in the atmosphere. Indonesia has the largest mangrove area in the world which would be potential to mitigate elevated CO2concentrations. A quantitative study on CO2dynamic was conducted in the habitat-variable and pristine mangrove of Bintan island. The study was aimed to estimate CO2flux on three different mangrove habitats, i.e., lagoon, oceanic and riverine. Even though all habitats were dominated by Rhizophora sp, they were significantly differed one another by species composition, density, and soil characteristics. Averagely, CO2dynamics had the positive budget by ∼0.668 Mmol/ha (82.47%) which consisted of sequestration, decomposition, and soil efflux at 0.810 Mmol/ha/y, -0.125 Mmol/ha/y and -0.017 Mmol/ha/y, respectively. The study found that the fringing habitat had the highest CO2capturing rate and the lowest rate of litter decomposition which was contrast to the riverine site. Therefore, oceanic mangrove was more efficient in controlling CO2dynamics due to higher carbon storage on their biomass. A recent study also found that soil density and organic matter had a significant impact on CO2dynamics.