Differential Responses of the Catalytic Efficiency of Ammonia and Nitrite Oxidation to Changes in Temperature.

ABSTRACT: Microbially mediated nitrification plays an important role in the nitrogen (N) cycle, and rates of activity have been shown to change significantly with temperature. Despite this, the substrate affinities of nitrifying bacteria and archaea have not been comprehensively measured and are often assumed to be static in mathematical models of environmental systems. In this study, we measured the oxidation kinetics of ammonia- (NH₃) oxidizing archaea (AOA), NH₃-oxidizing bacteria (AOB), and two distinct groups of nitrite (NO₂ ^-)-oxidizing bacteria (NOB), of the genera Nitrobacter and Nitrospira, by measuring the maximum rates of apparent activity (V _max(app)), the apparent half-saturation constant (K _<

SUBMITTER: Taylor AE 

PROVIDER: S-EPMC9127996 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature