Molecular Phylogenetics and Biogeography of Endemic Elements of the Guayana Highland Flora

圭亚那高地植物区系特有成分的分子系统发育和生物地理学

• 批准号: 9981587
• 负责人: Paul Berry
• 金额: $ 26万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2006-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9981587&HistoricalAwards=false
• 关键词: Molecular; Phylogenetics; Biogeography; Endemic; Elements

Project: DEB 9981587PI: BerryInstitution: U WisconsinThe Guayana Shield in northern South America is a geologically ancient area whose soils are heavily weathered and very nutrient-poor. Scattered throughout the region are over 50 isolated table mountains called tepuis. They harbor some of the most unique and localized species of plants on earth. This study focuses on two of the largest groups of plants endemic to this region, the Rapateacea, with some 100 species, and the pitcairnioid Bromeliaceae, comprising some 150 species. Most highland members of these groups are restricted to a single mountaintop, thus providing a unique opportunity to study their evolutionary and biogeographical history, similar to oceanic islands. The project will use modern molecular techniques to study variation in the DNA sequences of these groups to determine their relationships and understand how they evolved on different mountaintops. This study will help generate models of how these groups and numerous other smaller groups of organisms that share restricted ranges on the Guayana Shield evolved over time in their tepui habitats.

项目名称：位于南美洲北方的瓜亚纳地盾是一个地质古老的地区，其土壤风化严重，营养不良。 整个地区散布着50多座孤立的桌山，称为特普伊山。 它们孕育着地球上最独特和本地化的植物物种。 这项研究的重点是两个最大的群体的植物特有的这一地区，Rapateacea，约100种，和pitcairnioid凤梨科，包括约150种。 这些群体的大多数高地成员被限制在一个山顶，从而提供了一个独特的机会来研究他们的进化和地理历史，类似于海洋岛屿。 该项目将利用现代分子技术研究这些群体的DNA序列变异，以确定它们的关系，并了解它们如何在不同的山顶上进化。 这项研究将有助于建立模型，说明这些群体和许多其他较小的群体是如何在其tepui栖息地随着时间的推移在瓜亚纳地盾上共享有限范围的生物进化的。