Experimental research of the carbon circle features in “atmosphere – vegetation” system over the wetland area within the forest – steep zone in Ukraine using remote spectro- and gasometry under the global climate changes
Operation of the indicators for the reliable regional carbon dioxide content in atmosphere is the important factor for the computer simulation of climatic changes at the appropriate scale. A goal is the experimental study of the processes for carbon dioxide gas exchange (photosynthesis and respiration) of wetland vegetation for the forest-steppe zone in Ukraine under recent climatic changes in order to determine the quantitative indicators for the CO2 removal rate from the atmosphere by this vegetation. For this the CO2 Qubit Systems s151 (Canada) are used to measure СО2 in air end spectroradiometer FieldSpec® 3FR (USA). This system has got the respiratory flow-through camber, where the test plant is placed. The CO2 concentration changes in this chamber are measured by IR gas analyzer for the certain timespan. Data are processed by LabProInterface. The results obtained for the main wetland plants (Carex riparia and Phragmites australis ) during the spring-summer vegetative period show that the growth of their productivity (CO2 removal rate from atmosphere) takes place only under the environmental temperature of 18-22 о С. Also, it is certain that the positive indicator for these systems is their appreciably longer photosynthetic activity period as compared with the different ecosystems due to the cooling effect of soil moisture in their habitat. It should be taking into account when the measures for minimization of regional warming effects are implemented with the maximally contributing to the reclamation and revivification of the wetlands.
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