Collaborative Research: The Chemical Speciation of Dissolved and Particulate Selenium in an Estuary: Effects on Trophic Transfer and Biogeochemical Cycling

Fisher合作研究：河口溶解态和颗粒态硒的化学形态：对营养转移和生物地球化学循环的影响。该提案应环境地球化学和生物地球化学（KGB）招标（NSF 06-152）提交。它是由国家科学基金会海洋科学部、化学部和MPS多学科活动办公室共同资助的。本研究将提高我们对旧金山湾硒的形态和营养转移的认识。像这样的河口是复杂的物理、化学和生物环境，不仅在地球化学上至关重要（例如，从污水到海洋环境的元素转移），而且在经济上也至关重要（例如，渔业、运输）。河口微量元素的地球化学特征已经得到了很好的研究，但这些微量元素的化学形态与它们在整个河口食物网中的循环之间的联系在很大程度上是未知的。本文提出的创新实地和实验室研究相结合，将使研究人员能够更准确地预测硒输入和物种形成对这些环境的整个营养结构的影响。此外，本文所采用的硒测定方法和方法应适用于其他微量元素和其他河口环境。坎昆,奥西- 9707946;费雪奥西- 9714308

9707946 Cutter/ 9714308 Fisher Collaborative Research: The Chemical Speciation of Dissolved and particulate Selenium in an Estuary: Effects on Trophic Transfer and Biogeochemical Cycling This proposal was submitted in response to the Environmental Geochemistry and Biogeochemistry (KGB) solicitation, NSF 06-152. It is being jointly funded by the NSF Division of Ocean Sciences, the Division of Chemistry and the MPS Office of Multidisciplinary Activities. The proposed research will improve our understanding of the speciation and trophic transfer of selenium in San Francisco Bay. Estuaries such as this, are complex physical, chemical and biological environments that are not only geochemically crucial (e.g. elemental transfer from the trash water to the marine environment), but are also economically vital (e.g. fisheries, transportation). The estuarine geochemistry of trace elements has been well studied, but the linkage between the chemical speciation of these trace elements and their cycling throughout the whole estuarine food web is largely unknown. The combination of innovative field and lab studies proposed here will allow researchers to more accurately predict the impact of Se input and speciation on the entire trophic structure of these environments. Moreover, the methods and approach used here for Se should be applicable to other trace elements and other estuarine environments. Cuner, OCE-9707946; fisher OCE-9714308