Quantitative estimators of structure in chosen stands of common oak and hornbeam (Carpino betuli – Quercetum roboris Anić 1959 / em. Rauš 1969)

Gospodarenje šumom podrazumijeva zahvate koji utječu na prostornu strukturu, odnosno raspored stabala, kao i na raznolikost vrsta unutar sastojine. Bioraznolikost i prostorna struktura opisuje se najčešće kvalitativno opisima ili kvantitativno indeksima bioraznolikosti i prostorne strukture razvijenim u tu svrhu. Cilj ovog rada je na pokusnim plohama u sastojinama hrasta lužnjaka i običnoga graba (Carpino betuli – Quercetum roboris, Anić 1959 / emend. Rauš 1969.) analizirati strukturu pomoću BWINPro programa za analizu i prognozu rasta šumskih sastojina. Kvantitativni elementi strukture opisani su indeksima raznolikosti vrsta (bogatstva vrsta, Shannonov i standardizirani Shannonov) i njihove prostorne strukture (Clark & Evansov indeks agregacije, Pielou indeks segregacije vrsta).Forest management implies activities that affect spatial structure and distribution of trees as well as the diversity of forest tree species within the stand. Biodiversity and spatial structure are commonly described with qualitative descriptions or quantitatively indexes (estimators) of biodiversity or spatial structure developed for this purpose. Aim of this work is to quantitatively analyse species and spatial structures on plots in mixed stands of Common oak and Hornbeam using BWINPro program for analysis and prognosis of forest stands. Elements of structure were quantified with indexes of species composition (species diversity, Shannon index, Evenness) and of spatial distributions (Clark & Evans index of aggregation, Pielou index of segregation)