Dinosaur Evolution and Habitat Bottlenecks

恐龙进化和栖息地瓶颈

• 批准号: 8719878
• 负责人: David Weishampel
• 金额: $ 8.5万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-01-15 至 1990-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8719878&HistoricalAwards=false
• 关键词: Dinosaur; Evolution; Habitat; Bottlenecks

The St. Mary River and Willow Creek Formations of Montana offer unequalled opportunities for the study of Late Cretaceous dinosaur faunas from upper coastal plains environments and particularly for the analysis of habitat bottlenecks and their effect on extinction and radiation of large bodied terrestrial from the Johns Hopkins University School of Medicine in 1986 make it certain that further exploration will yield important additions to our knowledge of the Late Cretaceous biota of the western interior of the U.S. It is proposed (1) to devote two field seasons to collecting, mapping, and detailed stratigraphic work in the St. Mary River and Willow Creek Formations (including areas only reconnoitered in 1986); (2) to analyze the three or more distinct types of eggs collected from the St. Mary River Formation; (3) to describe the juvenile and embryonic dinosaur remains (both material in hand and expected finds); (4) to describe the adult dinosaurs and other associated reptiles; and (5) to draw what conclusions are justified from the previously mentioned data about the evolution of the St. Mary River and Willow Creek dinosaurs, with special reference to their relationship to the opening of terrestrial habitats through the regression of the Bearpaw Sea.

蒙大拿州的圣玛丽河和柳溪地层为研究来自上部沿海平原环境的晚白垩世恐龙动物群提供了无与伦比的机会，特别是为分析栖息地瓶颈及其对大型陆地生物灭绝和辐射的影响，约翰·霍普金斯大学医学院于 1986 年提出，这确保了进一步的勘探将为我们对西部晚白垩世生物群的了解带来重要的补充。 美国内陆地区 建议 (1) 用两个野外季节在圣玛丽河和柳溪地层（包括 1986 年才勘察的区域）进行收集、测绘和详细地层工作； (2) 分析从圣玛丽河地层收集的三种或更多不同类型的鸡蛋； (3) 描述幼年和胚胎恐龙遗骸（现有材料和预期发现）； (4) 描述成年恐龙和其他相关爬行动物； （5）从前面提到的有关圣玛丽河和柳溪恐龙进化的数据中得出哪些结论是合理的，特别是它们与通过熊掌海消退而开放陆地栖息地的关系。