International Research Fellow Awards Program: Differential Responses of Native and Exotic Understory Plants to Different Rate of Nitrate Deposition: A Mechanism of Invasion

国际研究员奖励计划：本地和外来林下植物对不同硝酸盐沉积速率的不同反应：入侵机制

• 批准号: 0003822
• 负责人: Lisamarie Windham-Myers
• 金额: $ 1.7万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Fellowship
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003822&HistoricalAwards=false
• 关键词: International; Research; Fellow; Awards; Program

0003822WindhamThe International Research Fellow Awards Program enables U.S. scientists and engineers to conduct three to twentyfour months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will provide Dr. Lisamarie Windham of Lehigh University with support for twenty-four months to work with Dr. Juan Jose Armesto, at the Universidad de Chile in Santiago, Chile. Support for this project is through the U.S.-Chile Program.The spread of exotic plant species has become an increasingly important facet of global change when the replacement of native plants with exotic invaders alters community structure and nutrient cycling. A method used by researchers to predict which exotic plants will invade which landscapes is through surveys and models. To this end, the PI has considered how many mature forests of North America have high nitrate deposition rates and large populations of exotic understory plants, whereas Chilean old-growth forests have neither. To determine if nitrate deposits influence exotic plant success, the PI will examine nitrate use by exotic and native understory plants at three field sites and in greenhouse experiments with controlled nitrate deposition. Specifically, she will survey the forests of Chiloe for the presence of exotic plant populations and measure rates of nitrate reductase activity in populations of plants in Chile as well as other sites in the U.S., such as New York. The results will be provided to institutions of conservation and natural resource management.Dr. Armesto is an authority on plant communities of Chilean oldgrowth forests. The Universidad de Chile has been actively involved in the establishment and study of the system of National Parks and Reserves. The proposed research overlaps with current efforts to understand patterns of biodiversity in Chilean forests.

0003822温德姆国际研究员奖励计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。 该计划的奖项提供了联合研究的机会，并使用独特或互补的设施，专业知识和国外的实验条件。该奖项将提供利哈伊大学的Lisamarie温德姆博士与Juan Jose Armesto博士在智利圣地亚哥的智利大学合作24个月的支持。 对该项目的支持是通过美国-智利方案：外来植物物种的传播已成为全球变化的一个日益重要的方面，因为外来入侵者取代了本地植物，改变了群落结构和养分循环。 研究人员用来预测哪些外来植物将入侵哪些景观的方法是通过调查和模型。 为此，PI考虑了北美有多少成熟森林具有高硝酸盐沉积率和大量外来林下植物，而智利的古老森林两者都没有。 为了确定硝酸盐沉积是否影响外来植物的成功，PI将在三个实地考察外来和本地林下植物的硝酸盐使用情况，并在温室实验中控制硝酸盐沉积。 具体来说，她将调查奇洛埃的森林是否存在外来植物种群，并测量智利植物种群以及美国其他地点的硝酸还原酶活性，比如纽约。 研究结果将提供给保护和自然资源管理机构。Armesto博士是智利古老森林植物群落的权威。 智利大学一直积极参与国家公园和保护区系统的建立和研究。 拟议的研究与目前了解智利森林生物多样性模式的努力重叠。