Carbon

Human emission of carbon dioxide (CO2) has been accelerated, and greenhouse effect and ocean acidification are known as serious CO2-induced climate changes. There has been recently great interest in the ability of marine autotrophs as a sink for CO2, and such role was named as “Blue Carbon ” [1]. One of the focused environments for the capacity of Blue Carbon is coastal area where there are a variety of benthic organisms due to inhabitation of macrophytobenthos. Calculation on the capacity of Blue carbon in coastal environment included mangrove forest, seagrass meadow and salt marsh [1]. These communities are located in sandy or muddy bottom, and burial of their plant detritus into sediment would contribute to Blue Carbon. On the other hand, macroalgae are also important primary producer in coastal ecosystems [2], though their contribution was sometimes overlooked. Macroalgal habitat is rocky shore area and they do not have sandy or muddy substrates, implying that their detritus is no