Americas Program Dissertation Enhancement Research: Historical Biogeography and Systematic Relationships of South American Murid Rodents

美洲计划论文强化研究：南美啮齿类动物的历史生物地理学和系统关系

• 批准号: 9417252
• 负责人: Terry Yates
• 金额: $ 2.08万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-10-15 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417252&HistoricalAwards=false
• 关键词: Americas; Program; Dissertation; Enhancement; Research

9417252 Yates This Americas Program award will support the dissertation research of Jorge Salazar-Bravo, a Bolivian doctoral student working under the direction of Dr. Terry L. Yates at the University of New Mexico. The research, on the historical biogeography and systematic relationships of South American Murid rodents, will take place in Ecuador. The researcher will test two current models of murid evolution in South America using sigmodontine rodents, a genus of mice widely distributed on the continent. The hypotheses have specific predictions in the form of area cladograms that can be tested using a cladistic approach, but neither of the two models have been adequately tested. This project will estimate the phylogenetic relationships of two distantly related genera of the sigmodontine rodents, based on the cladistic analysis of mitochondrial DNA sequence data and outgroup comparisons with other closely related genera. If neither of the hypotheses fit the phylogenetic relationships, alternative hypotheses will be tested. This project will benefit the areas of macroecology and biogeography because it will shed light on historical factors that determine species richness at the local and continental scale, which, in turn, will help in defining and strengthening areas of potential interest for conservation purposes. The results may also be used in combination with those of avian biologists and others to strengthen and/or revise hypotheses of the evolution of open vegetation in South America. ***

9417252 Yates 该美洲计划奖将支持玻利维亚博士生 Jorge Salazar-Bravo 的论文研究，他在新墨西哥大学 Terry L. Yates 博士的指导下工作。 这项关于南美鼠科啮齿动物的历史生物地理学和系统关系的研究将在厄瓜多尔进行。 研究人员将使用乙齿鼠属啮齿动物（一种广泛分布在南美大陆的小鼠属）来测试目前南​​美洲鼠类进化的两种模型。 这些假设以面积分支图的形式提供了具体的预测，可以使用分支方法进行测试，但这两个模型都没有经过充分的测试。 该项目将基于线粒体 DNA 序列数据的分支分析以及与其他密切相关属的外类群比较，估计两个远缘相关的乙齿象啮齿动物属的系统发育关系。 如果两个假设都不符合系统发育关系，则将测试替代假设。 该项目将有利于宏观生态学和生物地理学领域，因为它将揭示决定当地和大陆尺度物种丰富度的历史因素，这反过来又将有助于确定和加强出于保护目的而具有潜在兴趣的区域。 这些结果还可以与鸟类生物学家和其他人的结果结合使用，以加强和/或修正南美洲开放植被进化的假设。 ***