Collaborative Research: The Impacts of Arctic and Alpine Refugia on Genetic Divergence in Tundra Flora

合作研究：北极和高山避难所对苔原植物区系遗传分化的影响

• 批准号: 0714212
• 负责人: Charles Davis
• 金额: $ 20.82万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0714212&HistoricalAwards=false
• 关键词: Collaborative; Research; Impacts; Arctic; Alpine

Researchers at Western Washington University and Harvard University were funded to employ molecular biological methods to assess the impact of climates changes on plant evolution over the past 2 million years. Patterns of genetic divergence will be elucidated for Arctic and alpine tundra plants with the expectation that those habitats provided fundamentally different refuges during ice ages. The former likely preserved genetic variation in large populations, while periodic fragmentation of the latter would have lead to loss of variation. Plant specimens will be collected from 18 Arctic and alpine locations in Siberia, Alaska, the Pacific Northwest, and the Rocky Mountains. Climatic influence on plant divergence will be investigated by comparison of gene trees developed for Arctic and alpine tundra species. The results will have applications in studies of the climate, geology, zoology, and Anthropology of Beringea. The project will impact undergraduate and graduate students; K-12 school teachers, and local plant enthusiasts.

西华盛顿大学和哈佛大学的研究人员获得资助，采用分子生物学方法来评估过去 200 万年来气候变化对植物进化的影响。将阐明北极和高山苔原植物的遗传分化模式，期望这些栖息地在冰河时期提供根本不同的避难所。前者可能在大群体中保留了遗传变异，而后者的周期性分裂可能会导致变异的丧失。植物标本将从西伯利亚、阿拉斯加、太平洋西北地区和落基山脉的 18 个北极和高山地点采集。将通过比较为北极和高山苔原物种开发的基因树来研究气候对植物分化的影响。研究结果将应用于白令海峡的气候、地质、动物学和人类学研究。该项目将影响本科生和研究生； K-12 学校教师和当地植物爱好者。