TY - JOUR
T1 - Effects of Water Table Fluctuation on Greenhouse Gas Emissions from Wetland Soils in the Peruvian Amazon
AU - Pärn, Jaan
AU - Soosaar, Kaido
AU - Schindler, Thomas
AU - Machacova, Katerina
AU - Muñoz, Waldemar Alegría
AU - Fachín, Lizardo
AU - Aspajo, José Luis Jibaja
AU - Negron-Juarez, Robinson I.
AU - Maddison, Martin
AU - Rengifo, Jhon
AU - Dinis, Danika Journeth Garay
AU - Oversluijs, Adriana Gabriela Arista
AU - Fucos, Manuel Calixto Ávila
AU - Vásquez, Rafael Chávez
AU - Wampuch, Ronald Huaje
AU - García, Edgar Peas
AU - Sohar, Kristina
AU - Horna, Segundo Cordova
AU - Gómez, Tedi Pacheco
AU - Muñoz, Jose David Urquiza
AU - Espinoza, Rodil Tello
AU - Mander, Ülo
N1 - Publisher Copyright:
© 2023, The Author(s).
PY - 2023/8
Y1 - 2023/8
N2 - Amazonian swamp forests remove large amounts of carbon dioxide (CO2) but produce methane (CH4). Both are important greenhouse gases (GHG). Drought and cultivation cut the CH4 emissions but may release CO2. Varying oxygen content in nitrogen-rich soil produces nitrous oxide (N2O), which is the third most important GHG. Despite the potentially tremendous changes, GHG emissions from wetland soils under different land uses and environmental conditions have rarely been compared in the Amazon. We measured environmental characteristics, and CO2, CH4 and N2O emissions from the soil surface with manual opaque chambers in three sites near Iquitos, Peru from September 2019 to March 2020: a pristine peat swamp forest, a young forest and a slash-and-burn manioc field. The manioc field showed moderate soil respiration and N2O emission. The peat swamp forests under slight water table drawdown emitted large amounts of CO2 and CH4. A heavy post-drought shower created a hot moment of N2O in the pristine swamp forest, likely produced by nitrifiers. All in all, even small changes in soil moisture can create hot moments of GHG emissions from Amazonian wetland soils, and should therefore be carefully monitored.
AB - Amazonian swamp forests remove large amounts of carbon dioxide (CO2) but produce methane (CH4). Both are important greenhouse gases (GHG). Drought and cultivation cut the CH4 emissions but may release CO2. Varying oxygen content in nitrogen-rich soil produces nitrous oxide (N2O), which is the third most important GHG. Despite the potentially tremendous changes, GHG emissions from wetland soils under different land uses and environmental conditions have rarely been compared in the Amazon. We measured environmental characteristics, and CO2, CH4 and N2O emissions from the soil surface with manual opaque chambers in three sites near Iquitos, Peru from September 2019 to March 2020: a pristine peat swamp forest, a young forest and a slash-and-burn manioc field. The manioc field showed moderate soil respiration and N2O emission. The peat swamp forests under slight water table drawdown emitted large amounts of CO2 and CH4. A heavy post-drought shower created a hot moment of N2O in the pristine swamp forest, likely produced by nitrifiers. All in all, even small changes in soil moisture can create hot moments of GHG emissions from Amazonian wetland soils, and should therefore be carefully monitored.
KW - Carbon dioxide
KW - Greenhouse gas
KW - Laughing gas
KW - Methane
KW - Nitrous oxide
KW - Peat
KW - Peatland
KW - Tropical
KW - Tropics
UR - http://www.scopus.com/inward/record.url?scp=85163729113&partnerID=8YFLogxK
U2 - 10.1007/s13157-023-01709-z
DO - 10.1007/s13157-023-01709-z
M3 - Article
AN - SCOPUS:85163729113
SN - 0277-5212
VL - 43
JO - Wetlands
JF - Wetlands
IS - 6
M1 - 62
ER -