Soil Conditions Rather Than Long-Term Exposure to Elevated CO₂ Affect Soil Microbial Communities Associated with N-Cycling.

ABSTRACT: Continuously rising atmospheric CO₂ concentrations may lead to an increased transfer of organic C from plants to the soil through rhizodeposition and may affect the interaction between the C- and N-cycle. For instance, fumigation of soils with elevated CO₂ (eCO₂) concentrations (20% higher compared to current atmospheric concentrations) at the Giessen Free-Air Carbon Dioxide Enrichment (GiFACE) sites resulted in a more than 2-fold increase of long-term N₂O emissions and an increase in dissimilatory reduction of nitrate compared to ambient CO₂ (aCO₂). We hypothesized that the observed differences in soil functioning were based on differences in the abundance and composition of microbial communities in general an

SUBMITTER: Brenzinger K 

PROVIDER: S-EPMC5651278 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature