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Articles by Pirouz Azizi
Total Records ( 2 ) for Pirouz Azizi
  Vahid Hosseini and Pirouz Azizi
  In order to determine the rate of litter decomposition of Alnus subcordata at two alder stands, litters from Vaz and Asalem with different parent material were collected in autumn. Litters of each region, put in four vases for 7 months in laboratory conditions. Sampling were taken within 21 days. Then nitrogen and carbon was measured in each interval. On the first day, the comparative study between two regions showed that there exits no significant difference between C and N contents of litters. The amount of N was 2.49 and 2.62% in litter of Vaz and Asalem, respectively. The amount of C was 43.4% in Vaz and 39.7% in Asalem. Rate of carbon variation showed no significant difference in two regions. Rate of nitrogen and C/N variation showed significant difference in two regions. C/N of litter reduced from 17.38 to 10.35 and from 15.12 to 10.67 in Vaz and Asalem, respectively.
  Abbas Banj Shafiei , Moslem Akbarinia , Seyyed Gholamali Jalali , Pirouz Azizi and Seyyed Mohsen Hosseini
  Effects of fire on vegetation are usually the most obvious impacts of burning. Iran has a total of 1.2 million ha temperate forest in the north where fires occur in ca. 300-400 ha annually. These are mostly surface fire and affect mainly undergrowth and young trees. This study focuses on the impact of fire on herbal layer biodiversity in Chelir forest in north of Iran. Biodiversity indices and coverage percent were used for comparing herb`s species between burned and unburned area. Biodiversity indices and coverage percent of shade tolerant species in unburned area were higher than burned area. It is necessary to consider recruitment practices such sowing and planting to prevent biodiversity decreasing and promote ecosystem stability.
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