Diversity and Carbon Sequestration of Seaweed in the Ma’an Archipelago, China

Seaweed communities perform a variety of ecological services, including primary productivity supply, biological habitat construction, water purification, and acting as marine carbon sinks. The abundance seaweed is the basis for assessment services in communities. Ma’an Archipelago, adjacent to Yangtze River estuary China, an important typical island group. In this study, coastal islands Zhejiang Province, was evaluated by means sonar detection scuba diving sampling methods. organic content six dominant species measured estimate sequestration capacity Archipelago. results show that 27 Rhodophyta, 10 Ochrophyta, two Chlorophyta were found distributed areas islands, with distribution width 2–60 m. Gouqi Island had longest shoreline, there, depth reached 15 m area community largest. slope rocks Sanheng survey large small. Archipelago 6.51–13.43 km2 33.16 ± 3.26%. biomass Ochrophyta largest, followed Rhodophyta. Among species, Sargassum thunbergii at 277.91–848.74 t per year, Undaria pinnatifida smallest. This study provides scientific guidance sink, conservation seaweeds China.