CRB: The Role of Apparent Competition and Patch Geometry in Mediating the Invasion and Restoration of Grassland Communities

CRB：表观竞争和斑块几何形状在调节草原群落入侵和恢复中的作用

• 批准号: 0444217
• 负责人: Omer Reichman
• 金额: $ 19.93万
• 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: 2005
• 资助国家: 美国
• 起止时间: 2005-03-15 至 2012-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0444217&HistoricalAwards=false
• 关键词: CRB; Role; Apparent; Competition; Patch

NSF Proposal AbstractPIs: Reichman and OrrockProposal Title: "The Role of Apparent Competition and Patch Geometry in Mediating the Invasion and Restoration of Grassland Communities".Biological invasions occur when non-native species become established in areas outside of their original range. Biological invasions have profound ecological impacts and economical costs, causing extinction of native species and shifts in ecosystem function that are estimated to cost over 138 billion dollars per year in the United States alone. This proposal will take place in the grasslands of California, where 9.2 million hectares (almost 25% of the entire state) are dominated by non-native plants. This proposal will examine whether 1) non-native plants fuel increases in native consumers that contribute to the elimination of native plants; and 2) whether landscape-mediated changes in consumer behavior lead to stronger impacts of consumers on native plants. This proposal links the biology of invasions, indirect interactions among plants and consumers, and spatial dynamics to provide novel insight into the forces structuring ecological communities. Moreover, the work outlined in this proposal has broad applied value because it may provide simple "rules of thumb" to aid conservation biologists in prioritizing areas for protection and to guide the design of restoration efforts. More generally, this work will provide insight into how processes that change patch geometry affect the overall course of invasions, which may be critical in contemporary landscapes where fragmentation is changing patch geometry at unprecedented rates.

NSF提案摘要PI：Reichman和Orrock提案标题：“表观竞争和斑块几何学在调节草原群落入侵和恢复中的作用”。当非本地物种在其原有范围以外的地区定居时，就会发生生物入侵。 生物入侵具有深远的生态影响和经济成本，导致本土物种灭绝和生态系统功能的转变，仅在美国估计每年就花费超过1380亿美元。 这项提案将在加州的草原上进行，那里有920万公顷（几乎占整个州的25%）的土地被非本土植物所占据。这项提案将研究1）非本土植物是否会增加本土消费者的数量，从而导致本土植物的消失; 2）消费者行为的变化是否会导致消费者对本土植物产生更大的影响。该建议将入侵生物学、植物和消费者之间的间接相互作用以及空间动态联系起来，为构建生态群落的力量提供了新的见解。 此外，这项建议中概述的工作具有广泛的应用价值，因为它可以提供简单的“经验法则”，以帮助保护生物学家优先考虑保护领域，并指导恢复工作的设计。 更一般地说，这项工作将提供深入了解如何改变补丁几何形状的过程中影响入侵的整体过程，这可能是至关重要的，在当代景观的碎片化正在改变补丁几何形状在前所未有的速度。