DISSERTATION RESEARCH: The ecological and evolutionary impact of an invasive jewelweed on a native congener

论文研究：入侵宝石草对本地同类的生态和进化影响

• 批准号: 1311453
• 负责人: Deborah Roach
• 金额: $ 1.46万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1311453&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; ecological; evolutionary; impact

Invasive plants often evolve in response to novel habitats. Is it also possible that native plants may evolve in response to invasive competitors? The aim of this project is to investigate the potential for a native jewelweed, Impatiens capensis, to evolve in response to competition from an invasive jewelweed, Impatiens glandulifera, in New England plant communities. In greenhouse and experimental field settings, previous research showed that the invasive jewelweed alters natural selection on vegetative and floral traits of the native plant. This study will test whether this same altered selection occurs in natural plant communities. Using removal experiments and a reciprocal transplant experiment, the study will measure natural selection on the native plant both with and without the invasive jewelweed present, and will test whether seedlings from invaded communities have evolved to better compete with the invasive. Invasive species challenge plant and animal communities throughout the world. This project will demonstrate how the long-term evolutionary impact of invasive species can be estimated in natural populations and should be considered when formulating conservation and restoration decisions. Results from this study will be shared with conservation organizations including The Nature Conservancy and The Massachusetts Invasive Plant Advisory Group. The project will also provide an undergraduate researcher with the opportunity to learn how to study natural selection in the field.

入侵植物通常是为了适应新的栖息地而进化的。本土植物是否也有可能为了应对入侵的竞争对手而进化？本项目的目的是调查本地的珠宝草，凤仙花，进化的潜力，以应对竞争，从入侵的珠宝草，凤仙花glandulifera，在新英格兰植物群落。在温室和试验田环境中，先前的研究表明，入侵的金鱼草改变了天然植物的营养和花性状的自然选择。这项研究将测试这种同样的改变选择是否发生在自然植物群落中。利用去除实验和相互移植实验，该研究将测量存在和不存在入侵金鱼草的本地植物的自然选择，并将测试来自入侵群落的幼苗是否已经进化到更好地与入侵植物竞争。 入侵物种对全世界的植物和动物群落构成挑战。该项目将展示如何在自然种群中估计入侵物种的长期进化影响，并在制定保护和恢复决策时加以考虑。这项研究的结果将与包括大自然保护协会和马萨诸塞州入侵植物咨询小组在内的保护组织分享。该项目还将为本科研究人员提供学习如何在该领域研究自然选择的机会。