Hydrological, physicochemical and metabolic signatures in groundwater and snowmelt streams in the Japanese Alps

• Morphological, hydrological and physicochemical conditions as well metabolic activity are assessed across streams. Comparisons made between snowmelt groundwater fed systems. Snowmelt streams experience no flow storm events. Groundwater had higher environmental stability activity. Patterns were similar to other regions of the globe, but there was inter-stream variation. The unique hydrology physicochemistry alpine provide an important influence on structure function inhabiting biological communities. A substantial body research exists many globe (e.g. Europe, North South America Greenland). To date, however, have been few studies investigating present in Japanese archipelago. lack information Japan is problematic regional climates, e.g. some highest levels snowfall globally, likely repercussions for morphological, hydrological, signatures, causing them differ from those observed regions. In this study we compare morphology, hydrology, Kamikochi region Alps. Stream discharge, water chemistry (major ions, silica, dissolved oxygen), temperature channel measured over a period 16 months 2017–2018. Metabolic determined using Resazurin-Resorufin (Raz-Rru) Smart Tracer variation Raz transformation rate understand effects ecosystem functioning. characterised by variability temperature, stream both, within sites. Indeed, two experienced several periods also floods. comparison, chemistry, discharge more temporally stable. one stream, attributed significant growth macrophytes. These findings indicate that patterns Alps largely resemble identified elsewhere, although diversity inter-site responsible flora fauna This therefore indicates potential importance habitat templates aquatic biodiversity hotspot region.