Dissertation Research: The Roles of Disturbance in the Persitence of Two Rare Plants in the Sandhills Community, Central Coastal California

论文研究：干扰对加利福尼亚州中部海岸沙丘社区两种稀有植物持续存在的作用

• 批准号: 0104786
• 负责人: Wayne Sousa
• 金额: $ 1万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2003-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0104786&HistoricalAwards=false
• 关键词: Dissertation; Research; Roles; Disturbance; Persitence

Disturbance often enhances diversity by creating a refuge allowing the persistence of fugitive native plants. Many exotic species are also successful colonizers of disturbances and may compete with native taxa. Thus, the effects of disturbance on native species in invaded communities are difficult to predict without an understanding of the differential responses of natives and exotics to disturbance. Within this context, the proposed research focuses on the effects of three soil disturbances (mounds, trails, and slides) on native plant species. Previous research indicates that fire facilitates rare native plants by removing accumulated leaf litter and exotic plants. Similarly, soil disturbances are hypothesized to facilitate natives, although exotic species may mitigate this beneficial effect. The response of native plants to disturbance, the presence of exotic species, and their interaction will be quantified through a series of manipulative experiments. The proposed research will document how plant life history traits and population dynamics interact with disturbance characteristics to determine temporal patterns within invaded communities.

干扰往往通过创造一个庇护所，使逃亡的本土植物得以生存，从而增强了多样性。 许多外来物种也是干扰的成功殖民者，并可能与本地类群竞争。 因此，在不了解本地物种和外来物种对干扰的不同反应的情况下，很难预测干扰对入侵群落中本地物种的影响。在此背景下，拟议的研究重点是三个土壤扰动（土丘，小径和幻灯片）对本地植物物种的影响。 先前的研究表明，火通过清除积累的落叶和外来植物来促进稀有的本土植物。同样，土壤扰动假设，以促进本地人，虽然外来物种可能会减轻这种有益的影响。 本地植物对干扰的反应，外来物种的存在，以及它们之间的相互作用将通过一系列的操纵实验来量化。 拟议的研究将记录植物生活史性状和种群动态如何与干扰特征相互作用，以确定入侵社区内的时间模式。