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- W571855905 abstract "Discussion Background Excess nitrogen (N) has detrimental effects on ecosystems, particularly in coastal waters where nitrate inputs from septic systems and agricultural runoff can lead to algal blooms, hypoxic zones, and fish kills. However, certain areas on the landscape have the ability to remove nitrate before it reaches the coast. Studies (Peterson et al. 2001; Mulholland et al. 2008) have suggested that shallow, low-flowing headwater streams may promote denitrification, the microbial processing of nitrate-N to N gases. Since headwater streams comprise about 70 to 80% of watershed drainage systems, they may be a valuable N sink, a place where nitrogen is retained, processed or removed from the water. Hypothesis Transient headwater streams in forested areas in southern Rhode Island have high N removal potential because of their low flow rates, long retention times, and high surfaceto-volume ratios, providing time for N processing and allowing for hyporheic interactions, i.e., groundwater and stream water mixing (Fig. 1). Additionally, nearby hydric soils are often anoxic and rich in organic matter, conditions necessary for denitrification. Approach We used GIS tools to identify transient headwater streams and conducted slug nitrate-N and bromide tests to determine flow rates and assess N removal." @default.
- W571855905 created "2016-06-24" @default.
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- W571855905 date "2011-01-01" @default.
- W571855905 modified "2023-09-27" @default.
- W571855905 title "Investigating the Potential for Nitrate-N Removal in Rhode Island Transient Headwater Streams" @default.
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