Collaborative Research: Developmental Srategies in Benthic Marine Invertebrates: Evolutionary Effects

PI将继续研究内在因素的作用 海洋无脊椎动物的进化速度和模式， 以双壳类和带壳腹足类为中心，分布在两个区域： 东太平洋晚第三纪（包括新近纪） 海湾和大西洋沿岸平原的晚白垩世。 丕的 将完善关于发展模式和地理， 地层和测深范围，增加关于身体大小的数据， 人口密度，并收集更多关于 欧洲软体动物的灭绝，生存和反弹 K-T界线。 PI将测试假设 关于：地理范围的单独和综合影响， 发育模式、体型、种群密度，以及 进化速率和模式的保存潜力; 这些模式与水深和纬度的关系; 体型的进化趋势和科普法则的频率 （广义vs狭义定义）;生存率和 欧洲和北美K-T边界的反弹模式， 以及它们与上面列出的背景图案的关系。

PI's will continue research on the role of intrinsic factors in evolutionary rates and modes of marine invertebrates, centering on the bivalves and shelled gastropods in two regions: the Neogene (including Recent) of the eastern Pacific and the Late Cretaceous of the Gulf and Atlantic Coastal Plain. PI's will refine databases on developmental modes and geographic, stratigraphic and bathymetric ranges, add data on body size and population densities and collect more data on patterns of extinction, survival and rebound for European mollusks around the Cretaceous-Tertiary (K-T) boundary. PI's will test hypotheses on: separate and combined effects of geographic range, developmental modes, body size, population density, and preservation potential on evolutionary rates and patterns; relation of those patterns to bathymety and latitude; evolutionary trends in body size and the frequency of Cope's Rule (broadly vs narowly defined); and similarity of survivorship and rebound patterns at the K-T boundary in Europe and North America, and their relation to the background patterns as listed above.