Ecological Biogeography of Plants on Islands

岛屿植物的生态生物地理学

• 批准号: 8814744
• 负责人: Martin Cody
• 金额: $ 8.9万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1991-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814744&HistoricalAwards=false
• 关键词: Ecological; Biogeography; Plants; Islands

Most island biogeographic studies suffer because they lack information on island habitats relative to mainland sites and they record only species presense-absence rather than density. In a limited number of previous studies, plants have been shown to have high immigration and low extinction rates on continental islands generally, and hence such islands are relatively species rich with low endemism. This study proposes to extend work begun in 1981 on the plant diversities, densities, and distribution on islands in Barkley Sound, Vancouver Island Canada. The new research will examine plant distributions as functions of habitat availability on various islands, turnover dynamics as functions of both biotic and abiotic factors on islands, and the short-term population and evolutionary consequences of the more dynamic species in the system. With a range of 185 islands from inshore rocks to over 30 km distant from "mainland", varying in size over 5 orders of magnitude, and with a very diverse flora with widely different growth forms, habitat requirements, dispersal and reproduction dynamics, the Barkley Sound system is ideal for a closer examination of many of the questions that currently cause dissent among ecological biogeographers. Proposed research will focus on habitat definition and quantification, classification of habitat quality for plant species, assessing the causes of species turnover, quantifying dispersal variables in two plant groups, soft-fruited species that are bird-dispersed and parachuted species that are wind-dispersed, and examining the effects of herbivory on colonization and the evolutionary consequences of island life to dispersal-related morphology and herbivore resistance.

大多数岛屿地理学研究受到影响，因为他们缺乏 岛屿生境相对于大陆生境的资料， 它们只记录物种的存在-不存在，而不是密度。 在之前有限的几项研究中， 在大陆上有高移民率和低灭绝率 一般来说，这些岛屿是相对物种 丰富的低特有性。 这项研究建议延长工作开始 在1981年的植物多样性，密度和分布上， 位于加拿大温哥华岛巴克利湾的岛屿。 新 研究将检查作为生境功能的植物分布 各岛屿的可用性，营业额动态作为功能 岛屿上的生物和非生物因素，以及 人口和进化的后果更动态 系统中的物种。 由185个岛屿组成 岩石超过30公里远的“大陆”，大小不等， 5个数量级，具有非常多样的植物群， 不同的生长形式、生境要求、扩散和 再现动态，巴克利音响系统是一个理想的 仔细研究目前造成的许多问题 生态地理学家之间的分歧。 拟议的研究将 重点是生境的定义和量化， 植物物种的生境质量，评估 物种周转，量化两种植物中的扩散变量 鸟类分散的软果物种， 降落伞物种是风分散，并检查 草食动物对殖民和进化的影响 岛屿生命对扩散相关形态的影响， 草食动物抗性