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：DEB 9981587PI：Berry机构：威斯康星大学威斯康星大学南美洲北部的圭亚那地盾是一个地质古老的地区，其土壤风化严重且营养贫乏。 该地区分布着 50 多座孤立的桌山，称为 tepuis。 它们孕育着地球上一些最独特、最本土化的植物物种。 本研究重点关注该地区特有的两个最大的植物类群：雷柏科（Rapateacea）（约 100 种）和凤梨科（pitcairnioid Bromeliaceae）（约 150 种）。 这些群体中的大多数高地成员仅限于一个山顶，从而为研究其进化和生物地理历史提供了独特的机会，类似于海洋岛屿。 该项目将利用现代分子技术来研究这些群体 DNA 序列的变异，以确定它们之间的关系并了解它们如何在不同的山顶上进化。 这项研究将有助于生成模型，了解这些群体以及在圭亚那地盾上共享有限范围的许多其他较小的生物群体如何在其特普伊栖息地随着时间的推移而进化。