Nitrous oxide fluxes from tropical peat with different disturbance history and management
| Autor: | Kitso Kusin, Riikka Hämäläinen, Suwido H. Limin, Jyrki Jauhiainen, R. J. Raison, Harri Vasander, Hanna Silvennoinen |
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| Přispěvatelé: | Department of Forest Sciences, Forest Ecology and Management |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Peat
Disturbance (geology) 010504 meteorology & atmospheric sciences education lcsh:Life Soil science CENTRAL KALIMANTAN Atmospheric sciences 01 natural sciences chemistry.chemical_compound Tropical peat Deforestation lcsh:QH540-549.5 PEATLANDS Ecology Evolution Behavior and Systematics Earth-Surface Processes 0105 earth and related environmental sciences Forest floor 4112 Forestry GREENHOUSE-GAS EMISSIONS METHANE FLUXES FOREST FLOOR lcsh:QE1-996.5 LAND-USE CHANGE 04 agricultural and veterinary sciences Nitrous oxide 15. Life on land CARBON-DIOXIDE EMISSIONS WATER-TABLE lcsh:Geology SOIL lcsh:QH501-531 3 ECOSYSTEMS chemistry 13. Climate action Greenhouse gas Carbon dioxide 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Terrestrial ecosystem lcsh:Ecology |
| Zdroj: | Biogeosciences, Vol 9, Iss 4, Pp 1337-1350 (2012) |
| ISSN: | 1726-4189 |
| Popis: | Tropical peatlands are one of the most important terrestrial ecosystems in terms of impact on the atmospheric greenhouse gas composition. Currently, greenhouse gas emissions from tropical peatlands following disturbances due to deforestation, drainage or wildfire are substantial. We quantified in situ nitrous oxide (N2O) fluxes during both dry and wet seasons using a closed chamber method at sites that represented differing land uses and land use change intensities in Central Kalimantan, Indonesia. Cumulative N2O fluxes were compared with carbon dioxide (CO2) and methane (CH4) fluxes. The mean N2O flux rates (N2O-N ±: SD, mg m−2 h−1) varied as follows: drained forest (0.112 ± 0.293) > agricultural peat at the Kalampangan site (0.012 ± 0.026) > drained burned peat (0.011 ± 0.018) > agricultural peat at the Marang site (0.0072 ± 0.028) > undrained forest (0.0025 ± 0.053) > clear-felled, drained, recovering forest (0.0022 ± 0.021). The widest N2O flux range was detected in the drained forest (max. 2.312 and min. −0.043 mg N2O-N m−2 h−1). At the other flux monitoring sites the flux ranges remained at about one tenth that of the drained forest site. The highest N2O emission rates were observed at water tables close to the peat surface where also the flux range was widest. Annual cumulative peat surface N2O emissions (expressed in CO2 equivalents as a percentage of the total greenhouse gas (N2O, CO2 and CH4) emissions) were 9.2 % at highest, but typically ~1 %. Average N2O fluxes and also the total of monitored GHG emissions were highest in drainage-affected forest which is characterized by continuous labile nitrogen availability from vegetation, and water tables typically below the surface. |
| Databáze: | OpenAIRE |
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