Greenhouse gas emissions from saturated riparian buffers and woodchip bioreactors

Greenhouse gas emissions and soil microbial activity for selected land use systems in floodplains

“…Soil N2O emissions from forest systems were correlated with soil inorganic N and soil temperature and moisture (Davis et al, 2018;Xue et al, 2019). There is a strong correlation between soil N2O emissions and soil temperature (r 2 = 0.64) and moisture (r 2 = 0.41) (Xue et al, 2019).…”

“…In both deciduous and coniferous forests increasing soil water content (80-95% WFPS) resulted in greater N2O emissions from soil (Schindlbacher et al, 2004;. Several studies showed a positive correlation between the concentration of soil N ions (NO3and NH4 + ) and N2O emission from forests Davis et al, 2018). Xue et al (2019) found a positive correlation (r 2 =0.77) between soil N content (NO3 -+ NH4 + ) in temperate coniferous forests and N2O flux.…”

“…Flooding and drought events in agricultural and other landuse systems affect the amount of soil GHG production by altering soil physical and chemical properties Davis et al, 2018). Soil physical and chemical properties such as soil temperature, water content, soil C and N play important roles in GHG production and emission from the soil (Wang et al, 2021).…”

“…Moreover, due to the damage of severe flooding, degraded riparian vegetation roots cannot remove excess N from soil (Peralta et al, 2014;Ou et al, 2019). Several studies found a positive correlation between soil N2O-N flux in riparian systems and concentration of NH4 + and NO3which are imported to the system through surface runoff during flooding events (Xu et al, 2021;Davis et al, 2018;. Riparian forests subjected to frequent flooding emit more N2O relative to occasional flooding events (Jacinthe et al, 2012).…”

“…Riparian forests subjected to frequent flooding emit more N2O relative to occasional flooding events (Jacinthe et al, 2012). Soil pH controls the activity of N2O reductase, and the decreased soil pH caused by flooding events inhibits the function of the enzyme and results in an incomplete denitrification process from N2O to N2 (Davis et al, 2018;. Furthermore, dissolved N2O production in riparian system's groundwater contributes to the surface N2O emissions (Mander et al, 2015;Soossar et al, 2011).…”