Collaborative Research: Moist Acidic Versus Nonacidic Tundra: Why does the Vegetation Composition Differ and What Are The Consequences for Ecosystem Carbon Storage?

合作研究：潮湿酸性与非酸性苔原：为什么植被组成不同以及生态系统碳储存的后果是什么？

• 批准号: 9902695
• 负责人: Sarah Hobbie
• 金额: $ 21.48万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-05-01 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9902695&HistoricalAwards=false
• 关键词: Collaborative; Research; Moist; Acidic; Versus

This project will study factors controlling carbon flux from two tundra types that are largely differentiated on the basis of the underlying soil type: acidic vs. non-acidic. The factors leading to flux of carbon from each tundra type will be determined in order to examine the role of climate on landscape vegetation and subsequent carbon release or sequestration. A combination of field, laboratory, and modeling studies will be preformed to examine the factors controlling carbon flux in each tundra soil type. A model will be developed to look at possible future scenarios for warmer climates so that the role global warming in the Arctic may be assessed. The study is critical for understanding climate impacts on tundra composition and concomitant carbon flux on a regional scale. Current understanding of tundra soil effects on carbon flux are limited to only one soil type in spite of the prevalence of the other type as well.

该项目将研究控制两种苔原类型碳通量的因素，这两种苔原类型在很大程度上是根据其下的土壤类型而区分的：酸性与非酸性。 将确定导致每种冻原类型碳通量的因素，以研究气候对景观植被的作用以及随后的碳释放或固存。 结合现场，实验室和模拟研究将进行检查控制碳通量的因素在每种冻原土壤类型。 将开发一个模型，研究未来气候变暖的可能情景，以便评估全球变暖在北极的作用。 这项研究对于了解气候对苔原组成的影响以及区域范围内伴随的碳通量至关重要。 目前对冻原土壤碳通量影响的认识仅限于一种土壤类型，尽管另一种类型也很普遍。