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Collaborative Research: Faunal Composition, Provinciality and Paleobiolgy of a Late Cretaceous Arctic Vertebrate Assemblage Revealed Through Cross-Latitudinal Comparisons

合作研究：通过跨纬度比较揭示白垩纪晚期北极脊椎动物群的动物群组成、省域性和古生物学

基本信息

批准号：
1736386
负责人：
Gregory Erickson
金额：
$ 13.11万
依托单位：
Florida State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2021-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1736386&HistoricalAwards=false
关键词：
Collaborative Research Faunal Composition Provinciality

项目摘要

The 70-million year old Prince Creek Formation of Arctic Alaska provides fossil evidence that a surprisingly diverse array of dinosaurs, birds, flying reptiles and small mammals lived in polar forests characterized by warm summers and five- to six-months of darkness and snowfall during the polar winter. Enduring these seasonally intense and variable conditions makes these animals uniquely suited to test major paleobiological questions pertaining to physiology, migration, body size changes, ecology and distribution. This project will examine these questions through new Arctic specimen collections and identifications, temperature determinations and growth studies, and comparison to findings with animals living at warmer lower latitudes. This project will bring together a diverse team of scientists who will share new ideas and methodologies and contribute to the education and training of graduate and undergraduate students. Results will be disseminated in scientific venues and presented publicly through museum exhibitions and K-12 presentations. The latter will include visits to rural, northern Alaskan schools to provide underserved Alaska Native students and teachers with an opportunity to learn about the fossils in their area and interact with NSF-sponsored researchers. Using macro- and microfossil remains, this study will establish a comprehensive dataset on the faunal composition of a Mesozoic polar assemblage, including descriptions of probable new species unique to the Arctic. Statistical techniques will be used to compare the faunal compositions between mid- and high latitudes to understand North American distribution patterns. Histological analyses of bones and teeth will provide the first rigorous testing of the affects of polar environments on the growth and physiology of dinosaurs and mammals. Lastly, a novel technique using biomarkers will be used to provide more precise paleotemperature estimates to understand the temperature regime experienced by the polar fauna.

北极阿拉斯加的7000万年前的Prince Creek地层提供了化石证据，证明在极地森林中生活着令人惊讶的各种恐龙，鸟类，飞行爬行动物和小型哺乳动物，其特点是温暖的夏季和极地冬季五到六个月的黑暗和降雪。忍受这些季节性的强烈和多变的条件，使这些动物特别适合测试有关生理学，迁移，身体大小变化，生态学和分布的主要古生物学问题。该项目将通过新的北极标本收集和鉴定、温度测定和生长研究以及与生活在较温暖低纬度的动物的研究结果进行比较来研究这些问题。该项目将汇集一个多元化的科学家团队，他们将分享新的想法和方法，并为研究生和本科生的教育和培训做出贡献。研究结果将在科学场所传播，并通过博物馆展览和K-12演示公开展示。后者将包括访问农村，北方阿拉斯加学校提供服务不足的阿拉斯加原住民学生和教师有机会了解他们地区的化石，并与NSF赞助的研究人员互动。这项研究将利用宏观和微观化石遗骸，建立一个关于中生代极地组合动物群组成的综合数据集，包括对北极特有的可能新物种的描述。统计技术将用于比较中纬度和高纬度地区的动物群组成，以了解北美的分布模式。对骨骼和牙齿的组织学分析将首次对极地环境对恐龙和哺乳动物的生长和生理的影响进行严格的测试。最后，一种新的技术，使用生物标志物将被用来提供更精确的古温度估计，以了解极地动物所经历的温度制度。