Geochemical and Microbial Community Attributes in Relation to Hyporheic Zone Geological Facies.

ABSTRACT: The hyporheic zone (HZ) is the active ecotone between the surface stream and groundwater, where exchanges of nutrients and organic carbon have been shown to stimulate microbial activity and transformations of carbon and nitrogen. To examine the relationship between sediment texture, biogeochemistry, and biological activity in the Columbia River HZ, the grain size distributions for sediment samples were characterized to define geological facies, and the relationships among physical properties of the facies, physicochemical attributes of the local environment, and the structure and activity of associated microbial communities were examined. Mud and sand content and the presence of microbial heterotrophic and nitrifying communities partially explained the variability in many biogeochemical at

SUBMITTER: Hou Z 

PROVIDER: S-EPMC5607297 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature