This paper describes the concentrations of selenite, selenate and organic selenide in pore water, and selenium in sediment cores in the marginal seas. The selenium accumulation rates for the Sulu Sea and the South China Sea were 1.16 and 0.21 mg cm^yr^. The upward diffusive fluxes of dissolved selenium were estimated by using Fick’s first law. The calculated fluxes od dissolved selenium as selenate in the Sulu and South China Seas were estimated to be 0.17 and 0.88 μg cm^yr^, respectively.本文データは一部CiNiiから複製したものである
