DISSERTATION RESEARCH Fossils and phylogeny: investigating the timing of diversification in a diverse lineage of Neotropical rodents (Caviomorpha: Octodontoidea)

论文研究化石和系统发育：研究新热带啮齿动物（Caviomorpha：Octodontoidea）不同谱系的多样化时间

• 批准号: 1110805
• 负责人: Bruce Patterson
• 金额: $ 1.5万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-05-01 至 2013-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1110805&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Fossils; phylogeny; investigating

Biodiversity patterns are products of historical processes such as speciation and extinction, but living species preserve only part of this history. Lineages with robust fossil records and diverse ecological and biogeographic radiations offer greater insights. This project focuses on one such lineage, the Octodontoidea (degus and their relatives). These rodents are diverse (193 species across six families), found throughout the Neotropics, and their fossil record extends back to the Oligocene (78 fossil genera). This project will investigate the patterns, timing, and rates of diversification of these rodents by integrating information from fossils and their geologic ages with DNA sequences from living species. These data will be used to generate a temporal hypothesis for the group's evolution that will then be used to examine how historical and ecological factors have influenced evolutionary rates over time. This project offers theoretical insights and practical information for conserving biodiversity, as many living octodontoids are threatened or endangered. Conducting this research at Chicago's Field Museum will facilitate outreach to an international audience; results will appear on a digital touch-screen in the Museum's DNA Discovery Center and shared through programs in the Education and Membership departments. Besides providing key training to a graduate student, this grant will contribute to public databases where biodiversity and genetic data will be deposited.

生物多样性模式是物种形成和灭绝等历史过程的产物，但活的物种只保留了这一历史的一部分。 具有强大化石记录和多样化生态和地理辐射的谱系提供了更大的见解。这个项目的重点是这样一个谱系，degus和他们的亲戚）。 这些啮齿动物种类繁多（6科193种），分布于整个新热带地区，其化石记录可追溯到渐新世（78个化石属）。 该项目将通过整合来自化石及其地质年龄的信息与来自活物种的DNA序列来调查这些啮齿动物的模式，时间和多样化速度。这些数据将被用来生成一个时间的假设组的进化，然后将被用来研究历史和生态因素如何影响随着时间的推移进化速率。该项目为保护生物多样性提供了理论见解和实用信息，因为许多活的拟齿科动物受到威胁或濒临灭绝。 在芝加哥菲尔德博物馆进行这项研究将有助于向国际观众推广;研究结果将出现在博物馆DNA发现中心的数字触摸屏上，并通过教育和会员部门的项目进行分享。 除了向研究生提供关键培训外，这笔赠款还将有助于建立存放生物多样性和遗传数据的公共数据库。