STUDYING FOR GREENHOUSE GAS FLUXES FROM THE WETLAND ECOSYSTEMS BY APPLICATION OF AUTOMATED METHODS

The use of automated systems when studying greenhouse gas (GHG) fluxes allows accurate measurements at minimal disturbance of the soil surface to be carried out and high resolution datasets for extended periods of time to be obtained. Due to the above advantages, chamber measurements play an important role while establishing long-term observations. In last decade, the eddy covariance (EC) technique has become the standard method to estimate net carbon dioxide (CO2) exchange between the atmosphere and soil, plant organs or complete ecosystems. Parallel observations been carried out during the growing season (from May to October) at the hollow-ridge landscape on Bakchar bog at the field station Plotnikovo, West Siberia. A good agreement found between seasonal CO2 fluxes obtained by different measurement methods. GHG fluxes have a local spatial variability: higher net CO2 uptake observed in open sedge-sphagnum fen and ridges with higher photosynthesis and respiration rates. Steady seasonal CO2 emission revealed from bog’s lake surface.