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- W2187519344 abstract "Selective cutting (single and group selection metho d) is most usual forest harvesting method in the Hy rcanian forests. In order to investigate impact of single selection method on the Hyrcanian forest two logged and unlogged sites in the Kheyrud forest research station of Teh ran University, Mazandaran province, were selected. In each site 30 circle sample plots (1000 m 2 ) by randomized-systematic method in a net of 100 m ◊ 100 m were collected. In every sample plot the data including the species, n umber of trees, diameter at breast height (cm) and height (m) were recorded. Afterward, in each sample plots the micro plots of 10 m ◊ 10 m (100 m 2 ) were designed to record of shrub information. Species diversity index includin g Shannon Wiener (H ׳), Simpson (1-D) and Margaleff (R1) was used to diversity analysis. To data analyzing, used was made of the Ecological Methodology software (V.7) and SPSS18 software. The results showed the numbers of 9 and 11 in the logged forest and 5 and 7 in the un logged forest for the species richness of trees and shrubs , respectively. Fagus orientalis Lipsky and Carpinu s betulus L were the most dominant tree plants and Ilex spinige ra (Loes). Loes. and Rubus persicus Boiss has domin ant shrub plants in this area. Tree and shrub diversity in th e unlogged area has higher means diversity index an d differences between tree and shrub diversity indexes in the two areas were statistically significant. Results show ed that shrub layer had the higher diversity indices (richness, d iversity and evenness). In total Single selection m ethod Logging has negative effect in the tree and shrub diversity ." @default.
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- W2187519344 date "2012-01-01" @default.
- W2187519344 modified "2023-09-24" @default.
- W2187519344 title "The impact of single selection method logging on the tree and shrub diversity in the Hyrcanian forests" @default.
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