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Herbaceous species diversity in relation to fire severity in zagros oak forests,Iran

Journal of Forestry Research 2014年第1期25卷 113-120页

作者： Morteza Pourreza Seyed Mohsen Hosseini Ali Akbar Safari Sinegani Mohammad Matinizadeh Seyed Jalil Alavai Department of forestry Tarbiat Modares University Soil department Bu-Ali Sina University Research Institute of forest and range lands

zagros forests are mainly covered byQuercus brantii L. coppices and oak sprout clumps occupy the forest area like patches. We investigated post-fire herbaceous diversity in the first growing season after fire. For this purpose neighboring burned and unburned areas were selected with the same plant species and ecological conditions. The data were collected from areas subjected to different fire severities. Overall 6 treatments were considered with respect to fire severity and the mi-crosites of inside and outside of oak sprout clumps including： unburned inside and outside of sprout clumps （Ni and No）, inside of sprout clumps that burned with high fire severity （H）, inside of sprout clumps that burned with moderate fire severity （M）, outside of sprout clumps that burned with low fire severity （OH and OM）. Different herbaceous com-position was observed in the unburned inside and outside of oak sprout clumps. The species diversity and richness were increased in treatments burned with low and moderate fire severity. However, in treatment burned with high fire severity （H）, herbaceous cover was reduced, even-ness was increased, and richness and diversity were not significantly changed. We concluded that besides the microsites conditions in forest, fire severity is an inseparable part of the ecological effect of fire on her-baceous composition.

关键词： biodiversity fire severity Oak sprout clump zagros forests,microsite

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