Collaborative Research: Moist Acidic vs. Non-Acidic 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: 0312186
• 负责人: Laura Gough
• 金额: $ 4.39万
• 依托单位: University of Texas at Arlington
• 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: 2002-09-01 至 2003-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0312186&HistoricalAwards=false
• 关键词: Collaborative; Research; Moist; Acidic; vs.

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冻土带类型的碳通量的因素，这两种冻土带类型在很大程度上根据底层土壤类型的不同而不同：酸性和非酸性。将确定导致每种冻土带类型的碳通量的因素，以便研究气候对景观植被的作用以及随后的碳释放或固存。将进行实地、实验室和模型研究相结合的研究，以检查控制每种冻土类型的碳通量的因素。将开发一个模型，以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冻土带组成和区域尺度上伴随的碳通量的影响至关重要。目前对冻土带土壤对碳通量的影响的了解仅限于一种土壤类型，尽管另一种土壤类型也很普遍。