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。溪流网络与它们流经的景观密切相关，并显著改变了从景观到海洋的营养物质和有机物质。这项工作将量化的相对影响的通流，横向输入，和hyporheic（一层表层沉积物，含有水不断交换与水在明渠）再生的季节性通量的C，N和P在北极河流网络，并确定这些影响将如何转移的季节性条件下，很可能是在未来有很大的不同。这一目标是早先目标的逻辑延伸。这项工作将侧重于在不同的河流河段尺度（1至4阶流）的季节动态，并将奠定基础的一个完整的河流网络模型，集成的影响，通过整个河流网络的贯通流，横向输入，hyporheic再生，和流中代谢对C，N和P通量。

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.