Biological Cycling of Trace Metals in the Sea

最近的计算表明，表层海水中痕量金属的再循环生物来源通量应超过所有其他投入。为了解决表层海水中痕量金属的生物循环问题，本项目将扩大首席调查员对浮游植物吸收金属的研究，以研究细菌对金属的吸收以及细菌在生物来源金属化合物再矿化中的作用。这项研究将包括研究藻类和细菌对铁、锌、铜、镍、钴和镉的吸收动力学，识别金属吸收和金属储存化合物以及金属蛋白，并对这些化合物释放金属的机制进行量化。

Recent calculations indicate that the recycled biogenic flux of trace metals in surface seawater should overwhelm all other inputs. In order to address the question of the biological cycling of trace metals in surface seawater, this project will expand on the principal investigator's research on metal uptake by phytoplankton to study metal uptake by bacteria and the role of bacteria in the remineralization of biogenic metal compounds. This research will include studies of the kinetics of algal and bacterial uptake of Fe, Zn, Cu, Ni, Co, and Cd, and the identification of metal uptake and metal storage compounds as well as metalloproteins, and the quantification of the mechanisms responsible for the release of the metals from these compounds.