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

合作研究：与美洲热带航道收缩和关闭相关的浅水区古环境变化

• 批准号: 9304654
• 负责人: Laurel Collins
• 金额: $ 12.23万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304654&HistoricalAwards=false
• 关键词: Collaborative; Research; Paleoenvironmental; Changes; Shallow

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.

PIS将记录与巴拿马地峡的出现有关的浅水动物区系环境变化。 使用稳定的表面和底部有孔虫的同位素分析，它们将1）确定海道最终闭合的年龄； 2）记录地峡任一侧的环境差异，3）在循环限制和截止期间，整个架子的环境条件的年代顺序分析。 研究将与正在进行的软体动物和深海孔子上的持续工作相结合。 共同研究应提供解释与此事件相关的进化和生态模式的框架。