Biogeochemical Cycling of Trace Metals in Fresh and Coastal Water

小行星9630572 本研究将探讨陆地和海洋表层沃茨中微量金属化学与微生物学之间的动态关系。首席研究员将进行实地和实验室研究，以确定两种微量金属铜和镉如何被海洋和淡水浮游植物和浮游细菌吸收，与生物螯合剂结合，并释放回水中。实地工作将在科德角的沿海盐池和瑞士的高山湖泊中进行，其他科学家已经建立了研究痕量金属地球化学的项目。实验室实验将有助于量化这些不同过程的速率。除了提高目前对影响表层沃茨微量金属化学的浮游生物生化途径的作用的理解外，这些研究还应提供对金属浓度和化学形态如何与浮游生物物种组成之间双向因果关系的深入了解。

9630572 Morel The dynamic relationship between the trace metal chemistry and microbiology of terrestrial and marine surface waters will be explored in this study. The principal investigator will conduct both field and laboratory studies to determine how two trace metals, copper and cadmium, are taken up by marine and freshwater phytoplankton and bacterioplankton, bound to biochelators, and released back into the water. The field work will be carried out in coastal salt ponds on Cape Cod and in Swiss alpine lakes where other scientists already have established programs to study trace metal biogeochemistry. Laboratory experimentation will help quantify the rates of these various processes. Besides improving current understanding of the role of plankton biochemical pathways impacting the trace metal chemistry of surface waters, these studies should also provide insight into how metal concentrations and chemical speciation are related in a two-way cause-and-effect relationship to planktonic species composition.