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Paper Information

Journal:   RANGELAND   SUMMER 2010 , Volume 4 , Number 2; Page(s) 228 To 239.
 
Paper: 

FIRE INFLUENCE ON VEGETATION CHANGES OF ZAGROS MOUNTAINOUS RANGELANDS (CASE STUDY: HAMADAN PROVINCE)

 
 
Author(s):  FATTAHI B.*, TAHMASEBI A.
 
* DEPARTMENT OF RANGE AND WATERSHED MANAGEMENT, COLLEGE OF NATURAL RESOURCES, MALAYER UNIVERSITY
 
Abstract: 

The aim of this study was to evaluate the results of a 5-year field study of the effects of season growth- fire on succession and vegetation changes in Zagros mountainous rangelands in Hamadan province. Burning occurred in summer-2004 and vegetation characteristics were measured for 5 years after burning every June. The effects of fire were studied by comparing plots and transects located at 6 burned sites with a nearby 6 non-burned sites (as control). Size and number of plots determined by “minimal area” and “statistical” methods, respectively Vegetation types were determined by physiognomic-floristic method in the field. Vegetation sampling was performed based on systematic-randomized method. The measured vegetation characteristics during the study period included cover and density of shrubs, perennial and annual grasses, species diversity, forage production, litter and bare soil percentage. Forage production was measured using clipping method, Shannon-Weiner method was used for species diversity evaluation. Four transects (with a length of 50 m) were located in each of burned and unburned sites and 5 plots were put along each transect.
To compare burned and unburned sites understudy properties, paired T-test was made while to compare the years changes, One Way ANOVA was used. To compare the means Duncan test was applied. Our results demonstrated that in burned sites density, cover percentage and forage production of perennial grasses significantly increased while, in contrast density and cover percentage of shrubs and annual grasses decreased. Percentage of bare soil increased in burned sites. The Species diversity reduced in initial years after burning but a gradual increase was observed at the end of study period.

 
Keyword(s): FIRE, VEGETATION, MOUNTAINOUS RANGELANDS, ZAGROS, IRAN
 
References: 
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