Biogenic silica composition and δ<sup>13sup>C abundance in the Changjiang (Yangtze) and Huanghe (Yellow) Rivers with implications for the silicon cycle
A method for measurement of terrestrial and marine biogenic silica (BSi) was developed. River BSi composition varies with terrestrial inputs and in-stream primary production. δ13C can be used as a tracer of terrestrial inputs of BSi into the coastal area.