THE RISK OF CLIMATE CHANGES ON ROMANIAN FORESTS
OCTAVIA BOGDAN, MARIA COŞCONEA
ABSTRACT.- The risk of climate change on Romanian forests. This work covers the influence of climate warming vertically in the Romanian Carpathians space, over the vegetation floors in general and the forest floors in particular, and the reaction of its feedback to climate warming. Thermal parameters are analyzed in two major reference periods that exceed the limits of the beginning (1896-1915, 1921-1955) and the end (1961-2010) of the twentieth century (table 1) and highlight the climate warming in the second period. However, the decade analysis of these parameters for 1961-2010, during the first three decades indicates negative deviations from the average period and positive deviations during the last two decades, which indicates that vertical heat is felt with delay. After positive deviations of mean annual temperature of +0.6...+0.7°C (table 3) in all forest floors, all forest ecosystems that are vulnerable to climate change, but the most vulnerable are those at higher altitudes (of conifers and shrubs dwarfs) in the warm half of the year and especially in the warmer months, when the disturbances reach +1.3°C (tables 3f., and 3g), while the half cold, especially in the colder months, where these deviations vary between +0.5 and +1.0°C (tables 3d and 3e), the most vulnerable are forest ecosystems of lower altitudes (oak and beech). If the warming continues, there is a risk of their degradation, occurring both naturally and anthropogenic. Under these conditions, the forest will not fulfill the role of climate equilibrium, CO2 storage in biomass and forest soils, so that the response to climate change is reverse,to cede CO2 to the atmosphere and other greenhouse gas emissions and to enhance the process of pollution, respectively, a warming climate, which requires a National Strategy for sustainable development of the forestry industry.
Key words: climate changes, global warming, vegetation floors, forest ecosystems, feedback reaction.