Widespread nitrous oxide undersaturation in farm waterbodies creates an unexpected greenhouse gas sink.

ABSTRACT: Nitrogen pollution and global eutrophication are predicted to increase nitrous oxide (N₂O) emissions from freshwater ecosystems. Surface waters within agricultural landscapes experience the full impact of these pressures and can contribute substantially to total landscape N₂O emissions. However, N₂O measurements to date have focused on flowing waters. Small artificial waterbodies remain greatly understudied in the context of agricultural N₂O emissions. This study provides a regional analysis of N₂O measurements in small (<0.01 km²) artificial reservoirs, of which an estimated 16 million exist globally. We show that 67% of reservoirs were N₂O sinks (-12 to -2 μmol N₂O⋅m^-2⋅d^-1) in Ca

SUBMITTER: Webb JR 

PROVIDER: S-EPMC6525509 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature