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.
Pärn, Jaan, et al. "Effects of Water Table Fluctuation on Greenhouse Gas Emissions from Wetland Soils in the Peruvian Amazon." Wetlands, vol. 43, no. 6, Jun. 2023. https://doi.org/10.1007/s13157-023-01709-z
Pärn, Jaan, Soosaar, Kaido, Schindler, Thomas, Machacova, Katerina, Muñoz, Waldemar Alegría, Fachín, Lizardo, Aspajo, José Luis Jibaja, Negron-Juarez, Robinson I., Maddison, Martin, Rengifo, Jhon, Dinis, Danika Journeth Garay, Oversluijs, Adriana Gabriela Arista, Fucos, Manuel Calixto Ávila, Vásquez, Rafael Chávez, Wampuch, Ronald Huaje, García, Edgar Peas, Sohar, Kristina, Horna, Segundo Cordova, ... Mander, Ülo (2023). Effects of Water Table Fluctuation on Greenhouse Gas Emissions from Wetland Soils in the Peruvian Amazon. Wetlands, 43(6). https://doi.org/10.1007/s13157-023-01709-z
Pärn, Jaan, Soosaar, Kaido, Schindler, Thomas, et al., "Effects of Water Table Fluctuation on Greenhouse Gas Emissions from Wetland Soils in the Peruvian Amazon," Wetlands 43, no. 6 (2023), https://doi.org/10.1007/s13157-023-01709-z
@article{osti_1992329,
author = {Pärn, Jaan and Soosaar, Kaido and Schindler, Thomas and Machacova, Katerina and Muñoz, Waldemar Alegría and Fachín, Lizardo and Aspajo, José Luis Jibaja and Negron-Juarez, Robinson I. and Maddison, Martin and Rengifo, Jhon and others},
title = {Effects of Water Table Fluctuation on Greenhouse Gas Emissions from Wetland Soils in the Peruvian Amazon},
annote = {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.},
doi = {10.1007/s13157-023-01709-z},
url = {https://www.osti.gov/biblio/1992329},
journal = {Wetlands},
issn = {ISSN 0277-5212},
number = {6},
volume = {43},
place = {United States},
publisher = {Springer},
year = {2023},
month = {06}}