TREE SPECIES DIVERSITY AND IMPORTANCE VALUE OF DIFFERENT FOREST COMMUNITIES IN YENICE FORESTS

Abstract

For the calculation of each kind of important value index is used to the number of individuals of the species, the number of species and the total number of individuals. This study is carried out for 24 localities in Kavakli and Citdere Nature Reserves Area's mixtured and pure beech and oak forests in Yenice Forests between 2014-2016. Changes in floristic composition were analyzed using the Importance Value index (IVI), calculated for each of the tree species. According to the results of the important value of Kavakli Nature Reserves Area (NCA) in forested areas Abies nordmanniana (Stev.) Spach subsp. bornmulleriana (Mattf.) Coode et Cullen (157.08 %) is a dominant species. According to the results of the important value index of Citdere Nature Reserves Area in forest area Fagus orientalis L. (%145.1) is dominant species. The tree species diversity and the richness parameters are important in terms of Evenness at P <0, 05 in the field of Kavakli. The maximum effect of the species settlement within the area is provided with precipitation, slope aspect and soil moisture. The increase of the species richness of trees causes the increase of species diversity in the field of the Kavakli and Citdere areas.