Collaborative Research: The Role of Wind Erosion in Ecosystem Change in Desert Grasslands

合作研究：风蚀在荒漠草原生态系统变化中的作用

• 批准号: 0316320
• 负责人: Howard Epstein
• 金额: --
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0316320&HistoricalAwards=false
• 关键词: Collaborative; Research; Role; Wind; Erosion

Arid and semiarid land degradation is characterized by the reduction or redistribution of vegetative production, accompanied by a similar reduction or redistribution of soil resources. Wind erosion is one mechanism that accounts for changes in soil fertility that accompany land degradation. Understanding the effects of aeolian processes on soils and vegetation in arid and semiarid lands is vital to our understanding of current controls on system dynamics as well as to predict future dynamics in the face of changing environmental conditions. The Investigators will conduct large-scale, integrated field experiments at the Jornada Basin LTER site that address the relationship between wind erosion, vegetative cover, soil nutrients, and plant function. The research will improve the understanding of the role of aeolian processes in plant-soil interactions in deserts, the role of abiotic transport in the evolution of soil patchiness, and the sources and sinks of dustborne nutrients.

干旱和半干旱的土地降解的特征是植物生产的减少或重新分布，伴随着类似的土壤资源的减少或重新分布。风侵蚀是一种机制，它解释了土壤降解伴随土壤生育能力的变化。了解风化和半干旱土地中的风化过程对土壤和植被的影响对于我们对当前对系统动态的控制以及面对不断变化的环境条件的预测动态至关重要。研究人员将在Jornada Basin lter部位进行大规模的集成田间实验，以解决风侵蚀，营养覆盖，土壤养分和植物功能之间的关系。这项研究将提高对风相土壤相互作用在沙漠中的作用，非生物运输在土壤斑点发展中的作用以及尘土飞来养分的来源和下沉的理解。