DISSERTATION RESEARCH: Determining how environmental heterogeneity and species traits interact to affect species invasion and coexistence over large spatio-temporal scales

论文研究：确定环境异质性和物种特征如何相互作用以影响大时空尺度上的物种入侵和共存

• 批准号: 0910043
• 负责人: Sally Hacker
• 金额: --
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-15 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0910043&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Determining; how; environmental

Biological invasions pose one of the greatest threats to global biodiversity and have profound economic impacts. However, predicting whether invasions will cause extinctions of native species or if natives can persist in the face of invasion remains challenging because these outcomes depend on both characteristics of the species involved and characteristics of the environment. This project seeks to explain patterns observed in two large-scale, long-term data sets in the heavily invaded California grasslands. The investigators will determine how similar are invasive plant species observed in field plots in terms of their phylogenetic relatedness, country of origin, and ecological traits. Spatial variation in the abiotic environment, especially soil characteristics, will also be measured in these field plots. Together, this information will be analyzed to determine the relative importance of environmental variation versus invasive species traits in contributing to local extinctions of native species. This project has important implications to land management; it will inform efforts directed at restoration and maintenance of native species diversity. The research will be conducted within the University of California Natural Reserve System, thus its data and findings will be explicitly available to all reserve system managers and the public through the reserve system's online research database and outreach publications. Furthermore, the investigators will provide seminars and tours of field plots to reserve visitors. This project supports the thesis research of a doctoral student and will provide opportunities for involvement of undergraduates in field research.

生物入侵是对全球生物多样性的最大威胁之一，具有深远的经济影响。然而，预测入侵是否会导致土著物种灭绝或土著是否能够在入侵面前坚持下去仍然具有挑战性，因为这些结果既取决于所涉及的物种的特征，也取决于环境的特征。这个项目试图解释在两个大规模的、长期的数据集中观察到的模式，这些数据集中在严重入侵的加州草原上。研究人员将确定在田间地块观察到的入侵植物物种在亲缘关系、原产国和生态特征方面有多相似。非生物环境的空间变化，特别是土壤特性，也将在这些田间地块中被测量。总之，这些信息将被分析，以确定环境变异与入侵物种特征在促成本地物种灭绝方面的相对重要性。该项目对土地管理具有重要影响；它将为旨在恢复和维持本地物种多样性的努力提供信息。这项研究将在加州大学自然保护区系统内进行，因此其数据和调查结果将通过保护区系统的在线研究数据库和外联出版物向所有保护区系统管理人员和公众明确提供。此外，调查人员将提供研讨会和实地参观，以保留游客。该项目支持一名博士生的论文研究，并将为本科生参与实地研究提供机会。