engleski

Regeneration dynamics of uneven-aged forest stand after the establishment of national park 'Risnjak' and the abandonment of the management activities

Monitoring of the stand structure development and regeneration processes on 1 ha large permanent plot in the national park 'Risnjak' started in 1998. Main objective was to gain an insight in the processes underway in previously managed uneven-aged forest stand in the national park 'Risnjak' in which no management activities were performed since 1953. Following problems were detected: beech dominated left side of the diameter distribution indicates a halt in the recruitment of fir seedlings some decades ago ; share of fir seedlings in the regeneration decreased from 23.4% in 1998 to 8.5% in 2007 while the share of beech seedlings increased from 16.1% up to 58.3% ; overall picture of beech domination is completed by large proportion of beech canopy cover over the plot. It is well known that recruitment of the fir seedlings could be improved by some form of well known silvicultural intervention, like creating a gap by removing old fir trees. Problem lies in strict form of protection forbidding any kind of intervention. Therefore we explored possibilities of two software packages for the presentation of research results to stakeholders in question. Properly executed steps in the chain: research – simulation and analysis – visualization and presentation, should, at least, initiate comprehensive silvicultural project to test different management options, and draw scientifically based conclusions on the future of the forests in national park 'Risnjak'.

silver fir and beech forest; uneven-aged forest; regeneration; national park; stand visualization

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