Collaborative Research: Paleoenvironmental Changes in Shallow Waters Associated with the Constriction and Closure of the Tropical American Seaway

PI将记录浅水环境变化 与巴拿马地峡的出现有关的动物群。 使用 地表和海底生物的稳定同位素分析 有孔虫，他们将1）确定最终关闭的年龄 2）记录海洋两侧的环境差异; 地峡，以及3）生成环境 在整个循环期间， 限制和切断。 研究将与正在进行的工作相结合 软体动物和深海有孔虫。 研究应提供 解释进化和生态模式的框架 与此事件有关。

PIs will document environmental changes in shallow-water fauna, associated with emergence of the Isthmus of Panama. Using stable isotope analyses of surface- and bottom-dwelling foraminifera, they will 1) determine age of final closure of the seaway; 2) document environmental divergence on either side of the isthmus, and 3) generate chronologic profiles of environmental conditions across the shelf through the period of circulatory restriction and cutoff. Study will be integrated with ongoing work on mollusks and deep-sea forams. Together studies should provide framework for interpreting evolutionary and ecological patterns associated with this event.