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; 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.

侵入性植物在全球造成了重大的环境和经济伤害。 即使可以成功地从一个地点去除侵入性植物，也很难防止其他入侵物种重新染色或定植。 这样的遗产效果？人们认为，侵入性植物是由这些植物改变负责养分，疾病的土壤中的微生物的方式而产生的，这些植物是养分，疾病和其他确定哪些植物在给定区域中生长的因素。 这项研究将研究侵入性草，日本高跷，如何影响土壤微生物并增加北美东部森林大火的强度。 一个重点将放在一组细菌上，以使氮（以硝酸盐的形式）以一种使高跷与本地草物种有益的方式。 另一个重点将是高跷入侵如何导致火灾更热，这反过来可能影响土壤细菌与没有高跷的地区的火灾不同。 通过揭示入侵物种如何改变土壤微生物和火力强度，这项研究将帮助土地经理制定有效的高跷和类似入侵物种的策略。 结果将通过为公园和娱乐部创建的小册子分发给当地土地经理。 该项目还与当地的高中老师合作，​​为高中生物学课程创建材料。 此外，作为印第安纳州布卢明顿（Bloomington）的一部分，将侵入性植物和土壤微生物的材料分发？程序。