Acquisition of Instrumentation to Quantify the Effects of Global Change on Plant Roots and Ecosystem Processes

购买仪器来量化全球变化对植物根系和生态系统过程的影响

• 批准号: 9413407
• 负责人: Kurt Pregitzer
• 金额: $ 10.33万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9413407&HistoricalAwards=false
• 关键词: Acquisition; Instrumentation; Quantify; Effects; Global

Fine roots are an important component of the carbon and nutrient budgets of terrestrial ecosystems. Recent developments in microvideo image analysis have made it possible to quantify fine root production, longevity and mortality for the first time under natural and experimental field conditions. Studies have shown that the root systems of plants are dynamic and responsive to changing atmospheric CO2 concentrations, soil temperature, and soil nitrogen availability. Man-caused deposition of N is a significant environmental concern over industrial regions of the Earth, and increasing atmospheric CO2 and soil temperatures are central facets of changing global environments. Because of our ability to quantify fine root demography, it is now possible to better understand the effects of atmospheric CO2, soil temperature and soil nitrogen availability on plant root dynamics and ecosystem-level feedbacks. Understanding the flux of carbon and nitrogen from root systems to soil and soil microbes is a critical aspect of global change in terrestrial ecosystems. This proposal attempts to justify NSF support for acquisition of instrumentation to quantify effects of global change on plant root, and ecosystem processes.

细根是陆地生态系统碳和养分收支的重要组成部分。在微视频图像分析方面的最新发展使得首次在自然和试验田条件下量化细根产量、寿命和死亡率成为可能。研究表明，植物根系是动态的，对大气CO2浓度、土壤温度和土壤氮有效性的变化具有响应性。人类造成的氮沉降是地球工业区的一个重要环境问题，大气二氧化碳和土壤温度的增加是全球环境变化的核心方面。由于我们有能力量化细根人口统计，现在有可能更好地了解大气CO2，土壤温度和土壤氮有效性对植物根系动态和生态系统级反馈的影响。了解碳和氮从根系到土壤和土壤微生物的通量是陆地生态系统全球变化的一个关键方面。该提案试图证明美国国家科学基金会支持购买仪器来量化全球变化对植物根系和生态系统过程的影响。