Benthic foraminifera as tracers of marine biogeochemical cycles and circulation: resolving microhabitats in relation to biogenic fluxes

摘要本项目将发展微传感器与小尺度沉积物采样相结合的技术，以探测有孔虫在不同尺度上的分布，并确定底栖有孔虫对不同生物通量的响应和分布模式。该研究将为更好地从第一性原理模拟底栖有孔虫组合组成提供基础数据，并将揭示可能影响有孔虫壳地球化学的化学微环境。反过来，本研究结果将汇集底栖生物地球化学和微生态学技术，以阐明有孔虫中环境代理信息的编码。实地研究将在挪威极地研究所（Norwegian Polar Institute）前往挪威斯瓦尔巴群岛（Svalbard）西部峡湾的游轮上进行，将涉及对表层沉积物进行多重取样，制作微传感器剖面，并使用细胞跟踪器绿色方法检查生物特征。这项研究将为一个积极促进本科生和研究生研究经验的项目提供支持，并将包括一个强大的国际合作组成部分。本项目由海洋科学部海洋地质与地球物理项目和国际科学与工程办公室共同支持。

Benthic foraminifera as tracers of marine biogeochemical cycles and circulation: resolving microhabitats in relation to biogenic fluxesAbstractThis project will develop techniques that combine microsensors with small-scale sediment sampling, in order to probe foraminiferal distributions at a range of scales and to determine the responses and distributional patterns of benthic foraminifera to variable biogenic fluxes. The primary objective will be to test and develop a suite of sub-sampling techniques that allow us to This research will provide fundamental data to better model benthic foraminiferal assemblage composition from first principles, and will reveal likely chemical microenvironments that influence foraminiferal shell geochemistry. In turn, the results of this research will bring together techniques in benthic geochemistry and micro-ecology to clarify the encoding of environmental proxy information in the foraminifera. The field research will take place on a Norwegian Polar Institute cruise to a fjord on the west of Svalbard, Norway and will involve multi-coring of surface sediments, production of microsensor profiles and examination of biofeatures using the cell tracker green method. This research will provide support for a program that has actively promoted research experiences for both undergraduate and graduate students, and will include a strong international collaboration component. This project is supported by both the Marine Geology & Geophysics Program of the Ocean Sciences Division and the Office of International Science and Engineering.