The advent of molecular techniques has improved our understanding of the microbial communities responsible for denitrification and is beginning to address their role in controlling denitrification processes. There is a large diversity of bacteria, archaea, and fungi capable of denitrification, and their community composition is structured by long-term environmental drivers. The range of temperature and moisture conditions, substrate availability, competition, and disturbances have long-lasting legacies on denitrifier community structure. These communities may differ in physiology, environmental tolerances to pH and O2, growth rate, and enzyme kinetics. Although factors such as O2, pH, C availability, and NO3− pools affect instantaneous rates, these drivers act through the biotic community. This review summarizes the results of molecular investigations of denitrifier communities in natural environments and provides a framework for developing future research for addressing connections between denitrifier community structure and function.
|Title||Environmental controls on denitrifying communities and denitrification rates: Insights from molecular methods|
|Authors||Matthew D. Wallenstein, David D. Myrold, Mary Firestone, Mary Voytek|
|Publication Subtype||Journal Article|
|Series Title||Ecological Applications|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Toxic Substances Hydrology Program|