Collaborative Research: How Does Changing Seasonality Affect the Capacity of Arctic Stream Networks to Influence Nutrient Fluxes from the Landscape to the Ocean?

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。河流网络与流经的景观紧密相连，并显著地转化了从景观到海洋的营养物质和有机物。这项工作将量化贯穿流、横向输入和暗流（一层表层沉积物，含有在明渠中不断与水交换的水）再生对北极河网中碳、氮和磷的季节性通量的相对影响，并确定这些影响将如何在未来可能发生重大变化的季节性条件下发生变化。这个目标是前面的逻辑延伸。本研究将关注不同河段尺度（1 - 4级河流）的季节动态，并为建立一个完整的河网模型奠定基础，该模型将整合贯穿流、侧向输入、潜流再生和河内代谢对整个河网中碳、氮和磷通量的影响。

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.