The effect of fire on the relative importance (SIV) index and frequency distribution models of plant species in the Zagros forests

Subject Areas : FOREST ecology

Saeideh  karimi ¹ (MSc.Graduate , Department of Natural Resources, University of Guilan)
Hassan  Pourbabaei ² (Professor, Department of Forestry, Faculty of Natural Resources, University of Guilan)
Yahya  Khodakarami ³ (PhD. Forest Ecology, Center of Natural Resources Researches , Kermanshah city)

Received: 2017-07-19 Accepted : 2017-11-15 Published : 2017-11-22

Keywords: Diversity, Fire, Zagros, SIV, parameter indices,

Abstract :

This study aimed to investigate the effect of fire on changes in the relative importance (SIV) index of woody species in the Strait of Bzazkhaneh forest zone in the North East of Kermanshah. For this purpose, 80 plots (In each of the 40 sample plots) 1000 square meters in circular shape with dimensions of 100 × 100 m grid systematic sampling in the forest area got out. Within each plot, type and the number of woody species record and for the species of herbaceous after determining the samples area using minimal area method, 40 sample plots in each areas, burned and unburned (controls) were chosen. The results showed that in both regions, the abundance of tree species for trees layers and regeneration for geometric distribution and for shurbs layer in the form of geometric distribution and in the control rod is broken. The shape of the curve for the herbaceous layer species for log-normal distribution in both regions, The tree layer and regeneration highest value of SIV belonged to Q.brantii and shurbs layer respectively in the fire and control belong to the species of Cerataeg aronia and Cerasus microcarpa and the layers of herbaceous species Avena Factua in both regions the highest amount of relative importance compared to other species is allocated to the data. From the above results it can be concluded that Habitat diversity of wood species is not in good condition, So protective measures to prevent fires In this area is essential.

References:

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