COLLABORATIVE RESEARCH: How does changing seasonality affect the capacity of arctic stream networks to influence nutrient fluxes from the landscape to the ocean?

合作研究：季节性变化如何影响北极河流网络影响从陆地到海洋的养分通量的能力？

• 批准号: 0902106
• 负责人: William Bowden
• 金额: $ 54.96万
• 依托单位: University of Vermont & State Agricultural College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902106&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; How; does; changing

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Stream networks are intimately connected to the landscapes through which they flow and significantly transform nutrients and organic matter that are in transport from landscapes to oceans. This work will quantify the relative influences of throughflow, lateral inputs, and hyporheic (a layer of surface sediments that contains water which exchanges continuously with water in the open channel) regeneration on the seasonal fluxes of C, N, and P in an arctic river network, and determine how these influences will shift under seasonal conditions that are likely to be substantially different in the future. This objective is a logical extension of earlier. This work will focus on seasonal dynamics at different river reach scales (1st to 4th order streams) and will lay the groundwork for a whole river network model to integrate the influences of throughflow, lateral inputs, hyporheic regeneration, and in-stream metabolism on C, N, and P fluxes through an entire river network.

该奖项根据 2009 年《美国复苏和再投资法案》（公法 111-5）提供资金。河流网络与其流经的景观密切相关，并显着改变了从景观到海洋运输过程中的养分和有机物。这项工作将量化通流、横向输入和潜流（一层表面沉积物，含有与明渠中的水不断交换的水）再生对北极河流网络中碳、氮和磷季节性通量的相对影响，并确定这些影响在未来可能有很大不同的季节性条件下将如何变化。这一目标是早期目标的逻辑延伸。这项工作将重点关注不同河流河段尺度（一级至四级河流）的季节动态，并将为整个河网模型奠定基础，以整合通流、侧向输入、潜流再生和河内代谢对整个河网碳、氮和磷通量的影响。