The solute chemistry and stable isotope investigation of the snowpack and stream samples demonstrates a large scale microbial NO3−
-N production (1.64 ± 1.41 kg Day−1
for MLE and 1.41 ± 1.43 kg Day−1
for MLW) and assimilation (1.39 ± 1.41 kg Day−1
for MLE and 1.35 ± 1.43 kg Day−1
for MLW) in the glacier catchment. The microbial nitrate production and consumption are several times higher than the actual nitrate flux of streams therefore infer that microbes play a much greater role in the glacial nitrogen.