Tidally driven porewater exchange and diel cycles control CO2 fluxes in mangroves
Alex Cabral,
Yvonne Yau,
Gloria Reithmaier
et al.
Abstract:Mangrove soils are highly enriched in organic carbon. Tidal pumping drives seawater and oxygen into mangrove sediments during flood tide and releases carbon-rich porewater during ebb tides. Here, we resolve semi-diurnal (flood/ebb tides), diel (day/night) and weekly (neap/spring tides) drivers of porewater-derived CO2 fluxes in two mangroves and update global estimates of CO2 emissions. Tidal pumping controlled pCO2 variability within the mangrove creeks. The highest values of pCO2 (2,585-6,856 µatm) and 222Rn… Show more
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