In 2007 catastrophic fire on Vidlič Mountain had been occurred. It had been burned down nearly 1000
hectares of forest. That year vegetation was totally destroyed. Ecosystems affected by fire are those with
great changes in variety of ecological parameters and they can recover by natural succession. Post fire areas
are being occupied by pioneer plants which start one natural cycle. Total organic acids content in plants from
fire affected forest was studied and the same plant species from forest which had not been affected by fire
were taken as a control. Total organic acids content for all plants from forest affected by fire was higher than
for plants from fire non affected forest except one plant (Aegopodium podagraria)