We propose to test an overarching hypothesis that differences in the magnitudes and components of feedbacks between hydrologic, geochemical, and biological processes control variations in solute and gas fluxes across periglacial systems. We deconstruct this overarching hypothesis into three distinct sub-hypotheses linked to the different types of streams that drain the field area.  Tests of these hypotheses will evaluate inputs, outputs, and transformations of organic and inorganic material among distinct periglacial watersheds.