Model forest stands on forest reserve lands of National Nature Park “Skolivski Beskydy”

Abstract

Accounting of forest fund on forest reserve lands is a primary stage of scientific studies investigations, which are focused on concerning of their resource potential and others qualities. The study object of investigation is forest stands of reserve zone of the National Nature Park «Skolivski Beskydy». The aim of research is selection of model forest stands. The model forest stands is forest stand with maximum of biodiversity and productivity with most compound vertical structure. Point cruising inventory is most adequate method for receiving primary data about object of research. The distinctive feature of this method is providing supplement of silviculturale and inventory indexes of investigated object through by analysis of spatial structure of forest stands, indexes of horizontal tree placement and biodiversity. The model forest stands in the condition of Majdan forest district were distinguished as a result of point cruising inventory and analyzing of primary data. There were distinguished six model forest stands were distinguished with age range from 55 to 136 years. These models stands were selecting from great number of primary data set. For the objective data selection additionally were developing two patterns were developed. First pattern is in describing dependence between average stand increasing and age. Second pattern is in showing the theoretical dependence of stem volume and average diameter of first stage of stand. The primary data were divided for two groups according to the value (increasing, stem volume). The first group is presented by model forest stands. These objects are laying on the top part of confidence part of model with one-two standard deviation limits. The analysis is shows complex vertical structure of model stands. The trees of models are distributed between three stand stages in different proportions. The share portions of first stage are varying between 43-63%, second stage – 4-32% and third – 24-31%. The analysis of volume distribution are showing the largest concentration on first stage (76-97%). The maximum part of stand volume on the second stage is made 21% and on third stage – 3%. The stages of model stand are formed from beech, fir and spruce. Only one stand from model stands is characterized by the larch, sycamore, spruce and fir in tree composition. The high productivity and structural compound model stands are typical nature formations and forest management activity must be oriented at for these stands.

Keywords

• mixed stand
• structure
• type of trees placement
• stand volume
• quantity of trees
• stage
• biodiversity
• index