CAREER: Assessing the Effects of Anthropogenic N-Deposition on the Carbon Cycling of Southern Californian Semi-Arid Shrublands

职业：评估人为氮沉降对南加州半干旱灌木丛碳循环的影响

• 批准号: 0133259
• 负责人: George Vourlitis
• 金额: $ 54.73万
• 依托单位: California State University San Marcos Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-04-01 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0133259&HistoricalAwards=false
• 关键词: CAREER; Assessing; Effects; Anthropogenic; Deposition

This project integrates ecological research with university graduate and undergraduate instruction to assess how inputs of atmospheric nitrogen (N) from fossil fuel emission alter the carbon (C) cycling of southern Californian semi-arid shrublands. Atmospheric N fertilization has been implicated in the decline of northern forests. However, the effects of atmospheric N fertilization on western shrublands have not been adequately quantified even though these ecosystems are exposed to some of the highest atmospheric N pollution levels in the world. This project will employ field observational and manipulative studies to assess changes in ecosystem structure and function to atmospheric N fertilization and provide a mechanistic understanding of the ecosystem response. In turn, the field studies will significantly enhance lecture and laboratory curricula in terrestrial ecology and provide students an opportunity to actively investigate the impact of human activities on the C cycling of ecosystems that are regionally important.

该项目将生态研究与大学研究生和本科生教学相结合，以评估化石燃料排放产生的大气氮 (N) 输入如何改变南加州半干旱灌木丛的碳 (C) 循环。 大气施氮与北部森林的衰退有关。 然而，大气氮肥对西部灌木丛的影响尚未得到充分量化，尽管这些生态系统暴露在世界上一些最高的大气氮污染水平之下。 该项目将采用实地观测和操作研究来评估生态系统结构和功能对大气氮施肥的变化，并提供对生态系统响应的机制理解。 反过来，实地研究将显着增强陆地生态学的讲座和实验室课程，并为学生提供积极研究人类活动对区域重要生态系统碳循环的影响的机会。