Dissertation Research: Controls on Carbon Cycling in Freshwater Pelagic Ecosystems: New Insights Using Natural Abundance Oxygen Isotopes

论文研究：淡水远洋生态系统碳循环的控制：利用天然丰度氧同位素的新见解

• 批准号: 0073115
• 负责人: Robert Howarth
• 金额: $ 1.89万
• 依托单位: Cornell Univ - State: AWDS MADE PRIOR MAY 2010
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073115&HistoricalAwards=false
• 关键词: Dissertation; Research; Controls; Carbon; Cycling

DDIG: Controls on carbon cycling in freshwater pelagic ecosystems: New insights using natural abundance oxygen isotopesWhile our understanding of net ecosystem production (photosynthesis minus respiration) is robust, scientists have been unable to measure rates of photosynthesis and respiration directly. The investigators performing this research have developed a way to measure these rates more accurately. This research will employ a mesocosm experiment and a lake survey to examine rates of photosynthesis, respiration, and carbon cycling in lakes. In particular, the researchers will examine the relative importance of phosphorus enrichment, light availability, and dissolved organic carbon supply in regulating these rates. This research will improve our understanding of controls on the functioning of freshwater pelagic ecosystems as well as provide insight into the future management of these important resources.

DDIG：淡水中上层生态系统碳循环的控制：利用自然丰度氧同位素的新见解虽然我们对生态系统净生产（光合作用减去呼吸作用）的了解很深入，但科学家们无法直接测量光合作用和呼吸速率。 进行这项研究的研究人员已经开发出一种更准确地测量这些比率的方法。这项研究将采用中生态实验和湖泊调查来检查湖泊中光合作用、呼吸和碳循环的速率。特别是，研究人员将研究磷富集、光利用率和溶解有机碳供应在调节这些速率方面的相对重要性。 这项研究将增进我们对淡水中上层生态系统功能控制的理解，并为这些重要资源的未来管理提供见解。