DISSERTATION RESEARCH: Tracing autochthonous carbon production and fate in a mountain stream

论文研究：追踪山间溪流中的本土碳生产和命运

• 批准号: 1110831
• 负责人: Robert Hall
• 金额: $ 1.4万
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1110831&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Tracing; autochthonous; carbon

This doctoral dissertation improvement project will study the movement and transformation of carbon in streams. Streams and rivers are not passive pipes that merely transport carbon. Active uptake of carbon through photosynthesis and subsequent release of carbon through respiration takes place in streams and can lead to complex patterns of carbon exchange with the atmosphere as water moves from land to the oceans. This study will measure the amount of carbon in mountain streams that is respired, stored in living organisms, and transported downstream. Current freshwater carbon budgets include the role of terrestrial carbon processing, but have not addressed the role of in-stream carbon fixation and processing and, consequently, may underestimate rates of carbon dioxide transfer from streams to the atmosphere, carbon burial, and carbon export downstream. This study will help complete our understanding of the role streams and rivers play in carbon movement in the landscape.

这一博士论文改进项目将研究河流中碳的运动和转化。小溪和河流并不是仅仅输送碳的被动管道。通过光合作用主动吸收碳，随后通过呼吸释放碳发生在溪流中，当水从陆地流向海洋时，可能导致与大气进行复杂的碳交换。这项研究将测量山间溪流中被呼吸、储存在生物体内并向下游输送的碳的数量。目前的淡水碳预算包括陆地碳处理的作用，但没有考虑溪流中碳固定和处理的作用，因此可能低估了二氧化碳从溪流转移到大气、碳埋藏和向下游输出碳的速率。这项研究将有助于我们完成对溪流和河流在景观中碳运动中所起作用的理解。