ELT Collaborative Research: Perturbation of the Marine Food Web and Extinction During the Oceanic Anoxic Event at the Cenomanian/Turonian Boundary

GSTDTAP

项目编号	1534474
	ELT Collaborative Research: Perturbation of the Marine Food Web and Extinction During the Oceanic Anoxic Event at the Cenomanian/Turonian Boundary
	Julio Sepulveda
主持机构	University of Colorado at Boulder
项目开始年	2015
	2015
项目结束日期	2017-08-31
资助机构	US-NSF
项目类别	Continuing grant
项目经费	91172(USD)
国家	美国
语种	英语
英文摘要	ELT Collaborative Research: Perturbation of the Marine Food Web and Extinction during the Oceanic Anoxic Event at the Cenomanian/Turonian Boundary by Timothy Bralower, Penn State University, EAR-1338316 Bradley Sageman, Northwestern University, EAR-1338312 R. Mark Leckie, Univ. Massachusetts, Amherst, EAR-1338317 Julio Sepulveda, MIT, EAR-1338318 ABSTRACT The expansion of oxygen-deficient waters, known as hypoxia, is occurring seasonally in places such as the Gulf of Mexico as a result of warming and pollution. Hypoxia can affect all marine organisms through the loss of habitat, changes in predator-prey dynamics, and availability of nutrients for primary production. Ocean acidification resulting from the input of anthropogenic CO2 is already impacting the ability of many organisms to grow shells. The geological record contains a series of natural experiments that allow us to address the biological response of the biota to ocean acidification and widespread oxygen deficiency. The Cenomanian-Turonian boundary (94 million years ago in the middle of the Cretaceous Period), a time interval marked by mass extinction, was also characterized by global oxygen deficiency and likely ocean acidification. Thus, the Cenomanian-Turonian boundary is an excellent ancient model for the impact of anthropogenic activities on marine ecosystems. A superb opportunity exits to explore the impact of oxygen deficiency and ocean acidification during the Cenomanian-Turonian boundary in rock outcrops from the western and southern margins of the US Western Interior Seaway. In Utah, rocks contain original ammonite aragonite as well as remains of large marine reptiles. In Texas, British Petroleum has made available a unique core and exclusive access to outcrop sections. Back-hoeing of rock outcrops will unearth pristine fossil shells suitable for reconstruction of ancient environmental conditions using geological proxies, and coring will provide rocks that can be studied to determine changes that took place over centuries. The insight gained from the CTB can be applied to other intervals of biotic upheaval in Earth history and will help improve projections of the impacts of human activities, including hypoxia and ocean acidification, on modern ecosystems.
来源学科分类	Geosciences - Earth Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/67408
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Julio Sepulveda.ELT Collaborative Research: Perturbation of the Marine Food Web and Extinction During the Oceanic Anoxic Event at the Cenomanian/Turonian Boundary.2015.