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

职业：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

• 批准号: 0092642
• 负责人: Bruce Hungate
• 金额: $ 78.16万
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0092642&HistoricalAwards=false
• 关键词: CAREER; Ecosystem; Responses; Rising; Carbon

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.

摘要：生态系统对不断上升的二氧化碳和气候变化的反应：通过氮循环的反馈科学家们现在一致认为，大气中二氧化碳(CO2)的浓度正在增加，这正导致全球气温上升。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，根本不是很清楚。植物需要氮素，而不断上升的二氧化碳和气候变暖都可能深刻改变生态系统中氮素循环的速度，以及植物获得所需氮素的能力。例如，气候变暖和二氧化碳升高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素的分解过程。这一职业项目结合了关于二氧化碳上升和变暖将如何影响土壤氮循环的研究，对本科生和研究生进行关于这些问题的重要性的教育，以及努力向公众传达这一研究项目的结果。