Effects of Water Table Fluctuation on Greenhouse Gas Emissions from Wetland Soils in the Peruvian Amazon

Abstract Amazonian swamp forests remove large amounts of carbon dioxide (CO 2 ) but produce methane (CH 4 ). Both are important greenhouse gases (GHG). Drought and cultivation cut the CH emissions may release CO . Varying oxygen content in nitrogen-rich soil produces nitrous oxide (N O), which is third most GHG. Despite potentially tremendous changes, GHG from wetland soils under different land uses environmental conditions have rarely been compared Amazon. We measured characteristics, , N O surface with manual opaque chambers three sites near Iquitos, Peru September 2019 to March 2020: a pristine peat forest, young forest slash-and-burn manioc field. The field showed moderate respiration emission. slight water table drawdown emitted A heavy post-drought shower created hot moment likely produced by nitrifiers. All all, even small changes moisture can create moments soils, should therefore be carefully monitored.