Evaluation of biodiversity indices variants in different distances from forest roads of western part of Guilan province (Case study: Chafroud forests)
Document Type : Research Paper
Author
Department of forestry and forest economics, Faculty of Natural Resources, University of Mohaghegh Ardabili
Abstract
Evaluation of ecological properties variants of ecosystem is necessary for planning and correct management. This research was done with the aim of evaluation of ecological properties variants of forest in forest road edges in western part of Guilan province. For this purpose, two roads with different age condistions were selected. In each road transects (70m) were established and plots with 200m2 area were established in 1, 10 and 50 m distances from the road edge. In each plot, type and number of regeneration species of trees and shrubs were measured and recorded. For investigation of tree a shrub species diversity used Simpson, Minhinic and peilo indices. ANOVA and Duncan tests were used for analysis of data. The results showed that there is sognificant difference between regeneration species of trees and shrubs in different distances (pvalue=0.021), in the two roads (pvalue=0.033) and in up side and down side of roads (pvalue=0.046). Also the results showed that there is no significant difference between distances, road type and road places regarding to Peilo index (pvalue>0.1). Simpson index in different distances classification (pvalue=0.010) and road type (pvalue=0.032), also Menhinic index in different distances classification (pvalue=0.000) and road type (pvalue=0.000) were significant differences. But there is no significant difference in up side and2 down side of roads (pvalue>0.4). According to the results forest road construction needs to consider technical and environmental principles.
Keywords
)