Life-History Analysis of a Tropical Bryophyte

热带苔藓植物的生活史分析

基本信息

项目摘要

9974086McLetchieMany plants occur in populations where one sex outnumbers the other. Scarcity or absence of one sex will limit or prevent sexual reproduction, making populations more vulnerable to environmental change, and risking extinction. Using a plant having gender frequencies that differ across populations, this research (1) assesses differences among individuals in sexual reproduction, clonal reproduction, and growth; (2) determines how these differences affect gender frequencies within and among populations; (3) begins a long-term field study monitoring gender frequencies; and (4) develops mathematical models to explain and predict natural patterns. A combination of DNA fingerprinting, field and greenhouse experiments, and modeling analysis are used to achieve these goals.Though many species feature both clonal and sexual reproduction, few studies have been able to distinguish their effects and those of growth on population dynamics over an entire life cycle. This project addresses these effects and their implications using a representative of a large but understudied group of plants (bryophytes). Thus, this research will contribute to the conservation of these plants and of other species capable of reproducing both clonally and sexually, while providing training to young researchers in a diversity of important and broadly useful research methods.
9974086 McLetchie许多植物的种群中,一种性别的数量超过另一种。 一种性别的稀缺或缺乏将限制或阻止有性生殖,使种群更容易受到环境变化的影响,并有灭绝的危险。 本研究使用一种在种群间具有不同性别频率的植物,(1)评估个体在有性生殖、克隆生殖和生长方面的差异;(2)确定这些差异如何影响种群内和种群间的性别频率;(3)开始一项长期的实地研究,监测性别频率;(4)开发数学模型来解释和预测自然模式。 尽管许多物种同时具有无性繁殖和有性繁殖的特征,但很少有研究能够区分它们和生长对整个生命周期种群动态的影响。 该项目使用一个大型但未充分研究的植物组(brabentes)的代表来解决这些影响及其影响。 因此,这项研究将有助于保护这些植物和其他能够无性繁殖和有性繁殖的物种,同时为年轻研究人员提供各种重要和广泛有用的研究方法的培训。

项目成果

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David McLetchie其他文献

David McLetchie的其他文献

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{{ truncateString('David McLetchie', 18)}}的其他基金

Collaborative Research: Linking Abiotic Stress to Gender Specific Fitness in a Desert Bryophyte
合作研究:将非生物胁迫与沙漠苔藓植物的性别特异性适应性联系起来
  • 批准号:
    0416407
  • 财政年份:
    2004
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Physiology and Life History in a Tropical Plant
热带植物的生理学和生活史
  • 批准号:
    0219762
  • 财政年份:
    2002
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
RPG: The Influence of Clonal Reproduction on Population Sex Ratios in Plants
RPG:克隆繁殖对植物种群性别比的影响
  • 批准号:
    9731181
  • 财政年份:
    1998
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant

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