Comparative analysis of the floristic composition and diversity of the vascular flora of neutrophile beech and fir forests with spruce in Bosnia and Herzegovina
2012
Vojniković, Sead (Faculty of Forestry, Sarajevo (Bosnia and Herzegovina)) | Višnjić, Ćemal (Faculty of Forestry, Sarajevo (Bosnia and Herzegovina)) | Balić, Besim (Faculty of Forestry, Sarajevo (Bosnia and Herzegovina)) | Mekić, Faruk (Faculty of Forestry, Sarajevo (Bosnia and Herzegovina))
This paper presents a study of the diversity of vascular plants within neutrophile beech and fir forest with spruce from the Illyrian area (Abieti-Fagetum illyricum Treg. 1957. nom ill.). Comparative studies using an identical method were conducted in two areas within the range of these forests in Bosnia and Herzegovina, in the central and western regions of Bosnia. Though these are the same plant communities, the starting point was the hypothesis that there are differences, both floristic and in diversity, between these forests within the sites studied, arising from their phytogeographical position as well as from the impact of management. The studies revealed that the beech and fir forest with spruce in western Bosnia (Grmeč) is floristically somewhat richer both in number of species and in diversity than that of central Bosnia (Bjelašnica). The values determined for Grmeč were as follows: average number of species 30; average Shannon index 2.64; average equality index 0.86; the values of the same indicators for Bjelašnica were: average number of species 28; average Shannon index 2.46; average equality index 0.83. Minor floristic differences were observed in the Illyrian species Cardamine trifolia, Cardamine kitaibelii (syn. Cardamine polyphylla) of Grmeč, which are not present in the Bjelašnica area. As regards diversity by number of tree species and the proportion of each species by number of individuals, greater diversity was observed on Grmeč, with a Shannon index value of 1.551, as against that of 1.303 for Bjelašnica. A variance analysis revealed a statistically significant difference in diversity by number of species and number of individuals on the areas studied. Diversity by basal area on Grmeč was 1.538, compared with 1.182 for Igman- Bjelašnica. Here too the differences were statistically significant, with a probability of 95%.
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