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RISS 인기검색어
- 검색키워드
- 저자 : Seyed Armin Hashemi (검색결과 3 건)
- 무료
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Seyed Armin Hashemi 강원대학교 산림과학연구소 2010 Journal of Forest Science Vol.26 No.1
Species diversity is one of the most important specifications of biological societies. Diversity of organisms, measurement of variety and examination of those hypotheses that are about reasons of diversity are such as affairs that have been desired by the ecologists for a long time. In this research, diversity of plant species in forest region, numbers of 60 sample plots in 256.00 square meters have been considered in random . systematic inventory was considered. In each sample plot, four micro-plots in 2.25 square meters in order to study on herbal cover, were executed that totally 240 micro-plots were considered. At each plot six diversity indices in relation to physiographic factors (slope, geographical aspect and altitude from the sea level) were studied. The results indicate that species diversity is more in the northern direction and also species diversity in slops less than 30% has the most amounts. Factor of altitude from the sea level did not have meaningful relation with species diversity. Through study on correlation of the numbers of species in sample plots with indices and also process and role of indices in different processors of analysis, Simpson's reciprocal index was suggested as suitable index in this type of studies.
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Hashemi, Seyed Armin Institute of Forest Science 2010 Journal of Forest Science Vol.26 No.1
Species diversity is one of the most important specifications of biological societies. Diversity of organisms, measurement of variety and examination of those hypotheses that are about reasons of diversity are such as affairs that have been desired by the ecologists for a long time. In this research, diversity of plant species in forest region, numbers of 60 sample plots in 256.00 square meters have been considered in random - systematic inventory was considered. In each sample plot, four micro-plots in 2.25 square meters in order to study on herbal cover, were executed that totally 240 micro-plots were considered. At each plot six diversity indices in relation to physiographic factors (slope, geographical aspect and altitude from the sea level) were studied. The results indicate that species diversity is more in the northern direction and also species diversity in slops less than 30% has the most amounts. Factor of altitude from the sea level did not have meaningful relation with species diversity. Through study on correlation of the numbers of species in sample plots with indices and also process and role of indices in different processors of analysis, Simpson's reciprocal index was suggested as suitable index in this type of studies.
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Investigation of zinc absorption in contaminated soil using tree species
Alireza Hosseinzadeh,Seyed Armin Hashemi 한국자원공학회 2014 Geosystem engineering Vol.17 No.6
Phytoremediation is a kind of technology based on the use of plants in removing contaminants, including heavy metals, which is cheap and environmentally compatible. In this research, the ability of Acer velutinum for phytoremediation of zinc element was reviewed. A. velutinum seedlings were prepared, zinc metal concentrations of 0, 10, 20 and 40 mg/kg of soil were added to the pot's soils after calculation and after two time periods of 45 days of the seedlings growth, roots and shoots were separated. The amount of zinc metal concentration was determined in the samples and the data were reviewed. The results showed that the amount of zinc concentration in all the organs was logical. The amount of zinc concentration in the second time period was more than the first time period. Based on the researches, this species can be appropriate for refining zinc metal-polluted soils.
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