Dissertation Research: Impacts of invasive species: population consequences of altering inbreeding depression and mating systems in native plants

论文研究：入侵物种的影响：改变本地植物近交抑制和交配系统的种群后果

• 批准号: 0807879
• 负责人: Alan Templeton
• 金额: $ 1.19万
• 依托单位: Washington University
• 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: 2008-06-01 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807879&HistoricalAwards=false
• 关键词: Dissertation; Research; Impacts; invasive; species

Invasive plants are one of the greatest threats to global diversity, yet the mechanisms by which they affect native plants are not well understood. In addition to directly reducing the fitness of native plant populations by competing for resources, invasive plants may disrupt important population properties, such as the extent of clonal reproduction, the proportion of self fertilization, or the fitness differences between self-fertilized and outcrossed individuals. In this study, the investigators will integrate genetic, molecular, and population modeling techniques to determine how the invasive purple loosestrife (Lythrum salicaria) alters these properties in the square-stemmed monkeyflower (Mimulus ringens), and the resulting affects the population fitness of M. ringens.This will be the first work to characterize the influence of invasive competitors on the fitness effects of self-fertilization in plants. Furthermore, it will quantify the population-level effects of an invasive competitor on a native plant, providing valuable insight to future attempts to predict and manage biological invasions. This research will contribute to the scientific training of undergraduate researchers and the education and management programs at the Shaw Nature Reserve in Missouri, which receives 60,000 visitors every year.

入侵植物是对全球多样性的最大威胁之一，但它们影响本土植物的机制尚不清楚。除了通过竞争资源直接降低本地植物种群的适合度外，入侵植物还可能扰乱重要的种群特性，如克隆繁殖的程度、自交受精的比例或自交和异交个体之间的适合度差异。在这项研究中，研究人员将结合遗传、分子和种群建模技术来确定入侵的紫色松花如何改变方茎猴花(Mimulus Ringens)的这些特性，从而影响环纹夜蛾的种群适合度。这将是首次表征入侵竞争对手对植物自花受精的适合度效应的影响。此外，它还将量化入侵竞争者对本地植物的种群水平影响，为未来预测和管理生物入侵的尝试提供有价值的见解。这项研究将有助于对本科生研究人员的科学培训，以及密苏里州邵氏自然保护区的教育和管理项目，该保护区每年接待6万名游客。