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

pi将继续研究内在因素在海洋无脊椎动物进化速率和模式中的作用，重点是两个地区的双壳类和有壳腹足类：东太平洋的新世（包括最近）和海湾和大西洋沿岸平原的晚白垩世。pi将完善关于发育模式、地理和水深范围的数据库，增加关于体型和种群密度的数据，并收集更多关于白垩纪-第三纪（K-T）边界附近欧洲软体动物灭绝、生存和反弹模式的数据。pi将检验以下假设：地理范围、发育模式、体型、人口密度和保存潜力对进化速度和模式的单独和持续影响；这些模式与水深、纬度的关系；体型的进化趋势和柯普法则的频率（广义与狭义定义）；欧洲和北美K-T边界的生存模式和反弹模式的相似性，以及它们与上述背景模式的关系。

PIs 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 reigons: the Neocene (including Recent) of the eastern Pacific and the Late Cretaceous of the Gulf and Atlantic Coastal Plain. PIs will refine databases on developmental modes and geographic 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. PIs will test hypotheses on: separate and continued 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 narrowly 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.