CRB: The Role of Seed Limitation, Resource Competition, and Community Complementarity in Invasions and Restorations

CRB：种子限制、资源竞争和社区互补性在入侵和恢复中的作用

• 批准号: 0235624
• 负责人: Omer Reichman
• 金额: $ 36.42万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0235624&HistoricalAwards=false
• 关键词: CRB; Role; Seed; Limitation; Resource

This project would research the efficacy of one particular technique in the restoration of native perennial California grasslands. Invasions by exotic species are among the most serious threats to global biodiversity and restoration is a critical tool to mitigate losses. In California, 9.2 million ha of native perennial grassland has been invaded by exotic annual plants from the Mediterranean region with a concomitant loss of native plant biodiversity, and altered biogeochemical processes including increased nitrate leaching, altered fire regimes, and decreased carbon storage.This research will utilize experiments that focus on the underlying ecological processes, particularly seed limitation and altered ecosystem processes, that may have facilitated and maintained the conversion of native habitat. The generality of the results will be determined by conducting experiments across a broad range of latitudes and habitats within California. The results may have broad application to many other settings where similar alteration of native habitats have occurred, providing an important tool to promote restoration efforts. Furthermore, the research sites employ up to 15 undergraduates students a year, and are visited by hundreds of school children and adults, providing an opportunity to educate people about important ecological changes and how to ameliorate them.

这个项目将研究一种特殊技术在恢复加州原生多年生草地中的功效。外来物种的入侵是对全球生物多样性最严重的威胁之一，而恢复是减轻损失的关键工具。在加州，920万公顷的原生多年生草地被来自地中海地区的外来一年生植物入侵，导致原生植物生物多样性丧失，并改变了生物地球化学过程，包括硝酸盐浸出增加、火灾制度改变和碳储量减少。这项研究将利用实验，重点关注潜在的生态过程，特别是种子限制和改变的生态系统过程，这些过程可能促进和维持了原生栖息地的转变。结果的普遍性将通过在加州范围内广泛的纬度和栖息地进行实验来确定。研究结果可广泛应用于许多其他发生类似原生生境变化的环境，为促进恢复工作提供了重要工具。此外，研究地点每年雇用多达15名本科生，并有数百名学童和成年人参观，为人们提供了一个教育重要生态变化以及如何改善它们的机会。