Investigation of site conditions of Astragalus eriostylus in South of Iran (case study: Bushehr province)
Paper Details
Investigation of site conditions of Astragalus eriostylus in South of Iran (case study: Bushehr province)
Abstract
The main goal of this research is to study the effect of soil characteristics and land form on dispersion of Astragalus eriostylus in Southwest of Iran. 22 habitats of plant species have been identified as appropriate for study of vegetation in the view of area, density and mass dispersion and then soil sampling was done. Study of vegetation in various habitats, subject of study, has revealed that 49 plant species are grown in the region. In order to choose an optimized cluster analysis method of indicating species has been used. According to diagram of changes in number of indicating species at each stage of clustering, when four clusters are chosen, 46 species enjoys meaningful indicating value, which have been considered as optimized numbers of groups. Astragalus eriostylus species is located on positive side of the first axle and there is the highest positive correlation between the same and such elements as elevation from sea level, aspect, slope to some extent, C/N and moisture of surface soil and a negative correlation between the same and Loam in surface soil. Results show that presence of Astragalus eriostylus and accompanying species in designated ecological groups, are influenced by elevation from sea level, slope and aspect. Concerning the fact that in Bushehr Province, upon increase of elevation from sea level, temperature is decreased and annual precipitation is increased, one may say that the species, subject of study and accompanying species at higher elevations shall indicate more competition with other species and be extended more.
Ahmadi H. 1986. Relationship between geomorphology, soil and vegetation cover on natural resources projects. Iranian journal of natural resources 40, 21-29.
Allen RB, Hewit AE, Partridge TR. 1995. Predicitny and use suitability vegetation and landform in depleted semiarid grassland, New Zealand. Landscape and urban planning 32, 31-42.
Atri M. 1997. Phytosociology. Iranian institute of Forests and Rangelands press, No. 171.
Braun-Blanquet J. 1983. Plant sociology. Koeltz scientific book, West Germany, 439 pp.
Caustan DR. 1998. An introduction to vegetation analysis. Unwin Hyman, London.
Daper C, Diekman M. 1998. Prediction of occurrence of vascular plants in deciduous forests of south Sweden by means of Ellenberg indicator values. Applied ecology 35, 43-55.
David R. 1998. An investigation to vegetation analysis. Blackwell, 160 pp.
English T. 2000. Ecological indicator and correlations with soil chemistry. Austrian journal of Ecology 5, 11-25.
Hardtle W, Muler F. 2004. Relation between pH value and nutrients in forests soil. Ecology and management 4, 47-59.
Klotzli F, Rabetaliana H. 2001. Biodiversity of the subalpine forest-grassland ecotone of the Madagascar. Mountain biodiversity 2, 165-175.
Kouhgardi E. 2004. Effect of physiographic factors and soil characteristics on establishment and distribution of plant species in mountain forests. Regenerating Mountain Forests conference proceeding. Munich, Germany.
Sadeghi M. 1995. Ecological investigation of three species of Ziziphus genus in Bushehr province. University of Tehran, 280 pp.
Veen P, Molnar Z. 2001. Grassland ecosystem in central and eastern Europe. EU enlargement conference proceeding, 24-39.
Wohlgemuth T, Keller W. 2000. The gradient of structure of Swiss forest vegetation. IAVS symposium proceeding, 186-189.
Zahedi Amiri Gh. 1998. Relation between ground vegetation and soil characteristics in a mixed hardwood stand. PhD thesis, University of Gent, Belgium, 29-54.
Esmaeil Kouhgardi, Mehrdad Akbarzadeh (2014), Investigation of site conditions of Astragalus eriostylus in South of Iran (case study: Bushehr province); JBES, V4, N4, April, P32-40
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