Estimation of organic carbon content and carbon sequestration capacity of macroalgae in natural seaweed field-Take subtidal zone of Gouqi Island,Zhejiang,as an example
In this paper,the species,distribution area and biomass per unit area of macroalgae in the subtidal zone of Gouqi Island,Zhejiang Province,were investigated through acoustic side scanning and SCUBA diving.At the same time,the organic carbon content of different macroalgae was detected,and based on the biomass per unit area,the biomass and carbon sequestration capacity of the subtidal algal field in Gouqi Island were estimated.The results showed that the distribution area of the subtidal zone algal field is about 22.33 hectares in Gouqi Island,and there were 19 species of 3 phyla of macroalgae are distributed.The content of organic carbon in different species ranged from 29.11％to 36.85％.Brown algae contain a special blue light effect and have the highest average organic carbon content(32.62％)which was followed by Chlorophyta(31.82％)and Chlorophyta(29.39％).The macroalgal carbon sequestration capacity per unit area was estimated to be 176.15g·C/m2,and the total carbon sequestration in the sea area is about 38.28 tons,equivalent to about 129.07 tons of CO2 emission re-duction.The results of this study can accumulate basic data for the study of carbon sequestration capac-ity of macroalgae farms in coastal waters,and also provided a scientific basis for the study of negative emission reduction path in the ocean.
Macroalgacarbon sinkorganinc carbonGouqi Islandsubtidal zone
NETL
NSTL
万方数据
