CAREER: Ecosystem Responses to Rising Carbon Dioxide and Climate Change: Feedbacks through the Nitrogen Cycle

摘要00 - 92642 HungateCAREER：生态系统对二氧化碳上升和气候变化的反应：通过氮循环的反馈科学家现在一致认为，大气中二氧化碳（CO2）的浓度正在增加，这导致全球气温上升地球仪。然而，这些变化将如何影响生态系统，特别是发生在地下的过程，根本没有得到很好的理解。氮是植物所必需的，而二氧化碳浓度的上升和气候变暖都可能深刻地改变生态系统中氮循环的速率以及植物获取所需氮的能力。例如，气候变暖和二氧化碳含量上升都可能改变水在生态系统中的流动方式，从而改变土壤微生物为植物提供氮的分解过程。这个职业生涯项目结合了对二氧化碳和变暖如何影响土壤中氮循环的研究，对本科生和研究生进行有关这些问题的重要性的教育，以及向公众传达该研究项目结果的努力。

Abstract00-92642HungateCAREER: Ecosystem responses to rising CO2 and climate change: Feedbacks through the nitrogen cycleScientists now agree that concentrations of carbon dioxide (CO2) in the atmosphere are increasing, and that this is causing temperatures to rise around the globe. Yet, how these changes will affect ecosystems, particularly processes that occur below ground, is not at all well understood. Nitrogen is required by plants, and both rising CO2 and climate warming could profoundly alter rates of nitrogen cycling in ecosystems and the ability of plants to acquire the nitrogen they need. For example, both warming and rising CO2 could change the way water moves through ecosystems, and thereby alter the process of decomposition through which soil microorganisms make nitrogen available to plants. This CAREER project combines research on how rising CO2 and warming will affect nitrogen cycling in soil, education of undergraduate and graduate students about the significance of these issues, as well as efforts to convey the findings of this research project to the public.