Dissertation Research: Plant-soil feedback and invasive stiltgrass: Studying the black box of the feedback loop

论文研究：植物-土壤反馈和入侵高跷：研究反馈回路的黑匣子

• 批准号: 1209892
• 负责人: Heather Reynolds
• 金额: $ 1.36万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1209892&HistoricalAwards=false
• 关键词: Dissertation; Research; Plant; soil; feedback

Invasive plants cause substantial environmental and economic harm, worldwide. Even when an invasive plant species can be successfully removed from a site, it is very difficult to prevent re-invasion or colonization by other invasive species. Such ?legacy effects? of invasive plants are thought to arise from the way in which those plants change microbes in the soil responsible for nutrients, diseases, and other factors that determine which plants can grow in a given area. This study will examine how an invasive grass, Japanese stiltgrass, may affect soil microbes and increase the intensity of forest fires in the eastern North America. One focus will be on a group of bacteria responsible for making nitrogen (in the form of nitrate) available in a way that benefits stiltgrass over native grass species. Another focus will be on how stiltgrass invasion results in hotter fires, which in turn may impact soil bacteria differently than fires in areas without stiltgrass. By revealing how invasive species change soil microbes and fire intensity, this study will assist land managers in developing effective strategies for control of stiltgrass and similar invasive species. Results will be distributed to local land managers via a pamphlet created for the Department of Parks and Recreation. In collaboration with a local high school teacher, the project is also creating materials on invasive plants for the high school biology curriculum. Additionally, material on invasive plants and soil microbes will be distributed as part of Bloomington, Indiana's ?Naturalist at Market? program.

入侵植物在世界范围内造成了严重的环境和经济危害。 即使入侵植物物种可以成功地从一个地点移走，也很难防止其他入侵物种的再次入侵或定居。 这样的？遗产效应？入侵植物的数量被认为是由于这些植物改变土壤中负责营养、疾病和其他决定植物在特定地区生长的因素的微生物的方式。 这项研究将研究一种入侵草，日本高跷草，如何影响土壤微生物，并增加北美东部森林火灾的强度。 一个重点将是一组细菌负责使氮（以硝酸盐的形式）以一种有利于高跷草的方式提供。 另一个重点将是高跷入侵如何导致更热的火灾，这反过来可能会影响土壤细菌不同于火灾地区没有高跷。 通过揭示入侵物种如何改变土壤微生物和火灾强度，这项研究将有助于土地管理人员制定有效的战略，控制高跷和类似的入侵物种。 调查结果将通过为公园和娱乐部制作的小册子分发给当地土地管理人员。 该项目还与当地一名高中教师合作，为高中生物课程编写关于入侵植物的材料。 此外，关于入侵植物和土壤微生物的材料将作为印第安纳州布卢明顿？市场上的自然？程序.