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Human-induced changes to the nitrogen cycle have led to a growing interest in processes that remove nitrogen from water. Denitrification, which is the microbial reduction of nitrate to gaseous nitrogen (mainly N 2 plus small amounts of N 2 O), can remove a large fraction of the fixed nitrogen that reaches a body of water, but rates of denitrification are(More)
Whole-system denitrification in the South Platte River was measured over a 13-month period using an open-channel N 2 method and mass-balance measurements. Concentrations of dissolved N 2 were measured with high precision by membrane-inlet mass spectrometry and estimates of denitrification were based on the mass flux of N 2 , after correction for reaeration(More)
The aim of this study was to determine a physiologically “ideal” temperature range of Pacific sardine (Sardinops sagax caeruleus) from the northern stock by assessing the effects of cumulatively increasing or decreasing temperature on their stress physiology. Sardines collected off the coast of Southern California during late spring and late fall were(More)
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