Collaborative Research: Experimental constraints on marine Fe isotope effects - Biology, ligands, and particles

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项目编号	1649435
	Collaborative Research: Experimental constraints on marine Fe isotope effects - Biology, ligands, and particles
	Seth John
主持机构	University of Southern California
项目开始年	2016
	2016-07-01
项目结束日期	2017-08-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	99337(USD)
国家	美国
语种	英语
英文摘要	Iron is an essential micronutrient for marine phytoplankton, which plays a key role in the global carbon cycle and marine ecosystems, and there is a need to better understand the sources and sinks of this essential micronutrient in the oceans. Iron isotopes are a recently developed tracer of iron biogeochemical cycling, and new iron isotope results indicate that iron-binding ligands may play a critical role in the isotopic fractionation of dissolved iron. At present, however, the quantitative importance of iron dissolution or biological iron uptake in the isotopic fractionation of dissolved iron in the oceans is not well-known. In this study, researchers from the University of South Carolina and the Bermuda Institute of Ocean Sciences will collect and analyze samples from the Bermuda Atlantic Time-series Station (BATS) in order to; 1) measure the rate and isotope fractionation of iron dissolution from natural aerosols and oxic sediments in the presence of natural iron-binding ligands, and; 2) examine how phytoplankton fractionate iron isotopes during biological uptake. Results from this study will advance the development of iron isotopes as a tool for tracing iron biogeochemical cycling in the oceans. Broader Impacts: The project will provide scientific training and development to undergraduate, graduate, and postdoctoral students. Results of the study will be used to raise public awareness of biogeochemical science via a webpage, outreach activities, and public tours at the Bermuda Institute of Ocean Sciences.
来源学科分类	Geosciences - Ocean Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/69712
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Seth John.Collaborative Research: Experimental constraints on marine Fe isotope effects - Biology, ligands, and particles.2016.