Distribution of Halophytes around Jeju Island, Korea

Jeju has declared a carbon-zero vision for 2035, and achieving this carbon-neutrality goal requires the expansion of effective carbon sinks. Given the limited potential for further increases in terrestrial carbon sequestration, enhancing coastal blue carbon ecosystems has emerged as a critical strategy. In particular, the restoration and management of coastal halophytes and seagrass ecosystems offer a promising pathway to increase carbon absorption and support climate mitigation policies at the regional scale. This study investigated the distribution and current status of key coastal halophyte species on Jeju Island in order to provide baseline information for blue carbon restoration planning. Target species included Hibiscus hamabo, Vitex rotundifolia, and glasswort. Their spatial distribution was assessed using drone surveys, field surveys, and diving surveys. Hibiscus hamabo was found mainly in areas isolated from the open sea, with an estimated distribution area of 3,300 m². Vitex rotundifolia was evenly distributed around Jeju, with an estimated distribution area exceeding 200,000 m². Glasswort was not observed along the Jeju coast and is presumed to have completely disappeared.