The study of Environmental Factors in Pteridium Aquilinum (L.) Kuhn Dispersion

Subject Areas : environmental management

Nazanin Yadollahi ¹ , Nematollah Khorasani ² , Asadollah Mataji ³ , Vahid Etemad ⁴ , Elmira Kazemi Jahandizi ⁵

1 - - M.Sc. Environmental Sciences, Faculty of Environment, University of Sciences and Research, Tehran, Iran
2 - Professor, Natural Resource Faculty, University of Tehran.
3 - Associate Professor, Naural Resource Faculty, Dept. Of Forest & Rageland, Islamic Azad University of Research Science Branch, Tehran
4 - Assistant Professor, Natural Resource faculty, Dept. Of Forest & Economy University of Tehran
5 - M.Sc. Environmental Sciences, Faculty of Environment, University of Sciences and Research, Tehran, Iran

Received: 2011-09-16 Accepted : 2012-01-28 Published : 2015-09-23

Keywords: Golestan National Park, Pteridium Aquilinum (L.) Kuhn, Hirkani Forests, Principal Components Analysis , (TWINSPAN) analysis and conseq,

Abstract :

Introduction: Ferns and their species are mostly found in wetting zones, for this reason the forests located at the northern side of Iran are considered as a suitable provenance for their growing up. Some studies have been conducted on Pteridium Aquilinum (L.) Kuhn in Iran, but no comprehensive research has yet been done in the field of environmental factors effective on their dispersion. This research aims to study the environmental factors effective on dispersion of this specie of Pteridium Aquilinum (L.)Kuhn in different heights of Hirkani Forests. The present research has been done in the northwest side of Golestan National Park. Methodology:   Some plots containing Pteridium Aquilinum (L.) Kuhn have randomly been selected in various heights of the area under studying, and then the soil and other available plant species were sampled on field and random basis. After registration of the available data, the soil of the center of the sample plot was sampled with a depth of 30 cm. Then the correlation between environmental variables and flora was specified using Principal Components Analysis (P.C.A) and the treatments were compared by Multiple Range Duncan - Tukey Analysis in SPPS environment. Conclusion: The flora was classified using (TWINSPAN) analysis and consequently two ecologic groups were categorized. Some key species were introduced in each group and the result of (TWINSPAN) analysis is matrix 62 species and 18 plots measuring 100 Sqm.  (P.C.A) results show that groups have properly been separated based on soil fertility and dispersion of ecologic groups in the area under studying are influenced by chemical properties or fertility conditions of the provenance. 

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