We conducted a one-month field survey in the Fukido River mangrove forest in Ishigaki Island again in the summer of 2022; Nakamura (D2) and Phyo (M2) were major contributors. We again received supports from the Port and Airport Research Institute, the National Institute for Environmental Studies, and Osaka Metropolitan University. This summer, we mainly investigated the process of inorganic carbon export from mangrove soils and the carbon cycle between mangroves, seagrasses, and coral reefs. We express our gratitude to the members of Fukui Prefectural University for their assistance in collecting and analyzing groundwater samples. We will continue our research to understand the whole picture of blue carbon in mangroves in Japan.
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