Dissertation Research: The Importance of Local Density and Relative Frequency for Plant Population Dynamics

论文研究：局部密度和相对频率对植物种群动态的重要性

• 批准号: 8802795
• 负责人: Peter Kareiva
• 金额: $ 0.6万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8802795&HistoricalAwards=false
• 关键词: Dissertation; Research; Importance; Local; Density

There have been several recent theoretical and empirical studies of competition between annual plants. Despite these efforts, many empiricists and theoreticians agree that there is little understanding of the impact of spatial heterogeneity on competitive interactions between plants. This is disturbing given the patchy nature of plant distributions and the ability of patchiness and dispersal to markedly alter competitive relationships in simple discrete models. The following are lacking: 1) experiments in which the spatial distrubutions of inter- and intraspecific competitors are manipulated; 2) experiments in which the consequences of dispersal (which alters these distributions) are investigated; and, 3) a theoretical framework for investigating competitive interactions between species with nonrandom spatial patterns. This project will investigate how spatial distributions and seed dispersal influence the dynamics of competing populations of Poa annua and Senecia vulgaris. A series of single generation competition experiments in which spatial distribution is manipulated under controlled conditions will be performed. Also the effects of dispersal will be incorporated by performing field experiments in which spatial distributions and dispersal are minipulated over many generations. Parallel with these experiments a model to explore more general questions about how dispersal and spatial patterns interact to determine plant population dynamics.

最近有几个理论和经验 研究一年生植物之间的竞争。 尽管有这些 尽管有许多学者和理论家的努力， 对空间异质性的影响知之甚少， 植物之间的竞争。 这让人不安 考虑到植物分布的不均匀性和 斑块和分散，以显着改变竞争力 简单离散模型中的关系。 以下是 缺乏：1）实验中，空间分布的 操纵种间和种内竞争者; 2） 实验中，扩散的后果（这改变了 这些分布）进行了研究;和，3）理论 研究竞争性相互作用的框架 具有非随机空间模式的物种。 该项目将 研究空间分布和种子传播 影响早熟禾竞争种群的动态， 普通老太婆 一系列的单代竞争 实验中，空间分布被操纵， 将执行受控条件。 此外， 分散将通过进行实地实验， 其空间分布和扩散被缩小 许多代人。 与这些实验平行的是一个模型， 探索更普遍的问题， 模式相互作用决定植物种群动态。