DISSERTATION RESEARCH:Integrating comparative phylogeography with ecological modeling to investigate Late Quaternary biogeography in four species of kangaroo rats (genus Dipodomys)

论文研究：将比较系统发育地理学与生态模型相结合，研究四种袋鼠大鼠（Dipodomys 属）的晚第四纪生物地理学

• 批准号: 0808565
• 负责人: Brett Riddle
• 金额: $ 1.15万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-15 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808565&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Integrating; comparative; phylogeography

This project addresses the role of climatic changes during the Pleistocene glacial-interglacial cycles on the distribution and evolution of species in the Great Basin of western North America. The investigator uses reconstructions of climatic conditions of the last glacial maximum (approximately 21,000 years before present) to reconstruct species distributions during this cold period and contrasts them with modern distributions. She then formulates hypotheses about the changes in distributional locations and sizes through time and tests these hypotheses using genetic data. She applies this methodology to four species of kangaroo rats (genus Dipodomys) distributed within the Great Basin of North America and evaluates the response of each species to climatic changes over the past 21,000 years. This research aims to effectively test general theories on how Great Basin organisms responded to past climatic change. Understanding the relationships between climatic changes, distributional changes, and population structure can provide an important foundation for conservation efforts. For example, regions where high genetic diversity has accumulated may represent areas where species have persisted through past episodes of climate change, and should therefore be prioritized as potential protected areas as the Earth experiences future episodes of human-induced climate change.

本项目研究更新世冰期-间冰期旋回期间气候变化对北美西部大盆地物种分布和演化的影响。研究人员利用末次冰期极大期（距今约21000年）的气候条件重建了这一寒冷时期的物种分布，并将其与现代分布进行了对比。然后，她提出了关于分布位置和大小随时间变化的假设，并用基因数据检验这些假设。她将这种方法应用于分布在北美大盆地的四种袋鼠鼠（Dipodomys属），并评估了每个物种在过去21,000年中对气候变化的反应。这项研究旨在有效地测试大盆地生物如何应对过去气候变化的一般理论。了解气候变化、分布变化和种群结构之间的关系可以为保护工作提供重要的基础。例如，积累了高度遗传多样性的地区可能代表了物种在过去的气候变化事件中持续存在的地区，因此，在地球经历未来人类引起的气候变化事件时，应优先作为潜在的保护区。