Earth Sciences Postdoctoral Research Fellowship Award

9704806伊万尼要破译进化变化和环境变化之间的复杂关系，需要对这两个变量进行详细和同时的记录，以便能够比较每个变量的模式。如果这些记录吻合，那么就有令人信服的证据证明环境在影响进化变化方向方面所起的作用。P.I.将通过始新世墨西哥湾沿岸平原的一个案例研究来探讨这个问题。她将通过分析生物成因碳酸盐的同位素组成来构建特定于沿海地区的温度曲线。将通过对生物成因碳酸盐的地球化学分析和对生物生长曲线的仔细微观采样，研究与始新世中期至渐新世全球变冷有关的温度和季节性的长期趋势。

9704806 Ivany Deciphering the complex relationship between evolutionary change and environmental change requires a detailed and simultaneous record of both variables so that patterns in each can be compared. If the records dovetail, then there is compelling evidence for the role of environment in influencing the direction of evolutionary change. The P.I. will explore this issue with a case study in the Eocene Gulf Coastal Plain. She will construct a temperature curve specific to the coastal region by analyzing the isotopic composition of biogenic carbonates. Secular trends in both temperature and seasonality associated with mid-Eocene to Oligocene global cooling will be examined through geochemical analysis of biogenic carbonates and careful microsampling of growth lines in organisms showing accretionary growth.