Estimation of emission and accumulation of greenhouse gases by peatland ecosystems of the licensed areas of Salym oilfield at Nefteyugansk region of the Khanty-Mansiysk Autonomous Okrug
E. A. DYUKAREV1,2, A. F. SABREKOV1,3, M. V. GLAGOLEV1,3,4, M. V. KISELEV2, I. V. FILIPPOV1, A. A. DMITRICHENKO1, E. D. LAPSHINA1
1Yugra State University, Khanty-Mansiysk, Russia
2Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk, Russia
3A. N. Severtsov Institute of Ecology and Evolution RAS, Moscow, Russia
4M. V. Lomonosov Moscow State University, Moscow, Russia
Keywords: peatland ecosystems, carbon balance, greenhouse gases, methane, carbon dioxide
Abstract
The paper summarizes the results of field studies of carbon dioxide and methane fluxes in peatland ecosystems on the territory of license areas of the Salym group of oil fields (Khanty-Mansi Autonomous Okrug). The largest fluxes of carbon dioxide and methane are observed in mesotrophic and eutrophic bogs, which are characterized by the maximum of biomass storages. Significant negative CO2 fluxes (-1161.6 mg CO2 m-2∙h-1) associated with photosynthesis have been recorded here, but they also have a high emission component of carbon exchange (ecosystem respiration) (more than 680 mg CO2 m-2∙h-1). Methane emission reaches 23.9 mg CH4 m-2∙h-1. In oligotrophic bogs, in the daytime, fluxes of СО2 in range from -400 to -600 mg CO2 m-2∙h-1 were recorded, and at night from + 160 to +840 mg CO2 m-2∙h-1. Methane fluxes from hummocks in oligotrophic bog complexes were up to 1.1 mg CH4 m-2∙h-1, and from decreases 3.9 mg CH4 m-2∙h-1 from hollows. Large carbon dioxide and methane fluxes were registered from the surface of clear-cuts at a pine-dwarf-shrub-sphagnum bog, where, depending on the ground cover, the release of CO2 can be from +46 to +480 mg CO2 m-2∙h-1, and emission of CH4 - up to 4.6 mg CH4 m-2∙h-1.
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