Dissertation Research: Comparative Distribution and Demography of Piper Species (Piperaceae) in Costa Rican Tropical Rainforest

论文研究：哥斯达黎加热带雨林中胡椒物种（胡椒科）的比较分布和种群统计

• 批准号: 8701022
• 负责人: Norma Fowler
• 金额: $ 0.75万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-11-01 至 1990-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8701022&HistoricalAwards=false
• 关键词: Dissertation; Research; Comparative; Distribution; Demography

The structure of a shrub community in the understory of a tropical rainforest will be studied by determining the site- specific demography of several species of Piper with overlapping, but not identical, distributions relative to site disturbance history. Measurements of survival and growth rates of plant life stages in different habitats will indicate to what extent the distributions and abundances of Piper species are due to the differential mortality, if any, of life stages in various each habitats. These data will also help elucidate the ecological roles and relative importance of vegetative propagation versus seed production. Dispersal and differential reproduction will also be examined. The distributions of all of the Piper species in the locality will be quantified with respect to a series of environmental parameters. The morphological and reproductive charateristics of all of these species in this locality will be compared to those from another location to ascertain if there are suites of characters in this genus that are consistently correlated with species distributions. The project will contribute to our understanding of the ways in which plant distributions and population sizes are regulated, and hence to our understanding of plant community structure.

本文研究了一种灌木林下灌木群落的结构 热带雨林将通过确定地点进行研究- 几种胡椒的特定人口统计学重叠， 但不完全相同，相对于现场干扰的分布 历史 植物存活率和生长率的测量 在不同的栖息地阶段将表明在何种程度上， 胡椒属物种的分布和丰度是由于 死亡率差异，如果有的话，在不同的生命阶段， 栖息地 这些数据也将有助于阐明生态 营养繁殖的作用和相对重要性 种子生产 扩散和差异繁殖将 也要检查。 所有风笛属物种的分布 在当地将量化的一系列方面， 环境参数。 形态和生殖 在这个地方所有这些物种的特征将是 与另一个地方的人进行比较，以确定是否有 这一属的一系列特征 与物种分布有关。 该项目将 有助于我们理解植物 分布和人口规模受到管制，因此， 我们对植物群落结构的理解。