Collaborative Research: FeCycle I I- Natural variability in plankton iron quotas during an unamended Lagrangian experiment

在这个项目中，南加州大学、田纳西大学诺克斯维尔分校和毕格罗海洋科学实验室的研究人员将研究海洋微量营养素动态，这是2008年9月由新西兰NIWA赞助的FeCycle II项目的一部分。国际小组将调查微量营养素铁（Fe）和其他微量元素与碳和营养生物地球化学的关系的自然循环。FeCycle II是一个独特的概念，因为它是一项郎朗日研究，将遵循sf6标记的贴片而不添加铁。美国团队将加入这一努力，以比较和对比浮游生物中铁和其他微量元素的配额，使用平行技术，包括高速分选流式细胞术和超滤耦合ICP-MS，铁和C放射性示踪剂，以及同步加速器x射线荧光。总之，这些将为铁配额的地球化学塑性提供多个独立的评估。在非常成功的FeCycle I研究的基础上，这项工作应该提高我们对生物地球化学和铁的大规模分布与全球碳循环之间联系的理解，在这一跨学科的国际努力的背景下。这项研究的更广泛影响包括大力致力于培训新一代海洋生物地球化学家，支持南加州大学新的女性PI，以及促进所有三个机构的外联和多样化，包括田纳西州和缅因州的EPSCoR组织。本研究将资助至少1名博士后、2名研究生和5名本科生，并将信息直接纳入同行机构的课程、公共宣传活动和网络传播中。与UT新闻学院的独特合作伙伴关系将提供新颖的公共和K-12教育组成部分。警务司将继续其悠久的历史，征聘代表性不足的群体，并参加以方法为导向的特别课程。拟议的工作将为FeCycle II研究提供关于特定群体铁和其他微量元素配额变化的基本信息，并有助于建立和加强美国与国际海洋科学界的合作联系。我们的研究将提供独特的铁配额信息和方法比较，这对于所有依赖海洋生物生产力估算的全球碳循环和气候变化模型都是至关重要的。

In this project, researchers at the University of Southern California, University of Tennessee Knoxville and the Bigelow Laboratory for Ocean Sciences will study oceanic micronutrient dynamics as part of the September 2008 FeCycle II project sponsored by NIWA New Zealand. The international team will investigate the natural cycling of the micronutrient iron (Fe) and other trace elements in relation to carbon and nutrient biogeochemistry. FeCycle II is a unique concept, since it is a Langrangian study that will follow an SF6-labeled patch without added Fe. The U.S. team will join this effort in order to compare and contrast the quotas of Fe and other trace elements in plankton using parallel techniques that include high-speed sorting flow cytometry and ultrafiltration coupled to ICP-MS, Fe and C radiotracers, and synchrotron x-ray fluorescence. Together, these will provide multiple independent assessments of the geochemical plasticity of Fe quotas. Building on the highly successful FeCycle I study, this work should improve our understanding of the linkages between the biogeochemistry and large-scale distribution of Fe and the global carbon cycle, within the context of this interdisciplinary international effort.The broader impacts of this study include a strong commitment to the training of a new generation of ocean biogeochemists, support of a new female PI at the University of Southern California, and the facilitation of outreach and diversification at all three institutions, including EPSCoR organizations in Tennessee and Maine. At least one post-doc, 2 graduate and 5 undergraduate students will be supported by this study, and information will be directly incorporated into courses, public outreach events and web dissemination at the peer institutions. A unique partnership with the UT School of Journalism will provide a novel public and K-12 educational component. The PIs will continue their well-established history of recruitment of underrepresented groups and participation in methods-oriented special courses. The proposed work will provide essential information on the variability in group-specific quotas for Fe and other trace elements to the FeCycle II study, and help to build and strengthen U.S. collaborative links to the international marine science community. The unique Fe quota information and methods comparison that our study will provide is critically needed for all models of global carbon cycling and climate change that depend on ocean biological productivity estimates.