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Carbon Fixation as Blue Carbon and Carbon Sequestration by Mangroves -…
Carbon Fixation as Blue Carbon and Carbon
Sequestration by Mangroves
Blue Carbon
Substantial scale
Long term storage
Undesirable human impacts
Achievable management actions to reduce GH
Carbon Fixation: Mangroves
Transitional ecosystems where the ocean, land, and
freshwater meet
Accumulation of organic matter: - Tidal amplitude, Forest elevation, Location in relation to coast/tidal way, Distance from adjacent habitats and primary productivity,
Swampy area with low oxygen conditions
Aerial roots above anaerobic substrate for
~ Gas exchange through lenticels of root (e.g.
~ Soil volume expansion
~ Water uptake
~ Lateral support to withstand waves and wind
Optimal growth conditions:
high humidity
~ high year-round rainfall
~ large intertidal range
~ moderate amount of land run-off
Carbon removal: Mangrove
Aboveground
Biomass of tree
Belowground
Carbon stored in peat
Sediment accretion
High productivity, low ratio of sediment respiration
Carbon Sequestration: Mangrove
lost in Southeast Asia at an average rate of 0.18% per year between 2000 and 2012.
13.9 million tonnes of CO2 emitted (MtCO2e) in a year in SEA due to loss of mangroves (Friess et al 2020).
Potential lost of sequestration potential
Global: 3401 MtCO2e by 2100
SEA: 1164 MtCO2e due to agriculture and aquaculture