SETTLEMENT ENVIRONMENTAL-CONDITIONS AND EVALUATION OF THEIR IMPACT ONURBAN VEGETATION

The anthropic activity in settlements causes abnormal emission of hete rogeneous matter. It has multielemental influence on urban ecosystems including urban vegetation too. Biographical situation of the settleme nt environment is conditioned by the following determinants: represent ation of landscape elements, metabolic imputs and outputs in the anthr opic activity of settlement, changed abiotic conditions of environment , the change of biotic environmental components. The geographical and immission climate of towns and the changed characteristics of urban so ils cause different forms and levels of damage to the urban vegetation : on the plant community, on the population and on the individuals lev el. The negative influence of changed town conditions may be evaluated according to damage symptoms of assimilative organs, generative organ s, growth shape deformation and overall physiological weakening sympto ms.