Determine of Impacts factors on limitation of distribution species Kelussia odoratissima mozaff. in Kohgiluyeh

Subject Areas : Journal of Plant Ecophysiology

E. Jahantab ¹ , A. Sepehri ² , M. Mesdaghi ³ , حسین بارانی ⁴ , A. Bagheri ⁵

1 - گروه علوم مرتع، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
2 - گروه علوم مرتع، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
3 - گروه علوم مرتع، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
4 - دانشگاه علوم کشاورزی و منابع طبیعی گرگان
5 - دانشکده کشاورزی، دانشگاه یاسوج

Received: 2014-09-26 Accepted : 2015-01-01 Published : 2015-10-01

Keywords: Kelussia odoratissima mozaff, Extinction, Habitat, Kohgiluyeh,

Abstract :

The aim of this research was to study its habitat and to define main ecological factors that limit its distribution objective of this study was to examine Kelussia odoratissima Mozaff. habitat and to determine affecting ecological factors on its distribution in Kohgiluyeh region. Vector base topographic map of the area was acquired and interred into GIS program. Height, slope and aspect maps were generated by creating DEM image. Land use, land evaluation, evaporation, temperature and precipitation maps of the area were seemingly created. 12 random transects (six in present and six in previous habitats) of Kelussia were laid out. 440 quadrats with the size of two by two meters were systematically plotted along transects. Canopy cover percentage and the number of Kelussia along with total canopy cover of other accompanying species were estimated in each quaderats. 12 soil samples were gathered in two sites to define, soil parameters including organic carbon, texture and soil depth. The associated pixel values of each plot were extracted and added to prepare spread sheet of field data base. Non parametric regression analysis was performed to determine association between biophysical parameters of Kelussia and environmental parameters. Analysis of variance was performed to see if there exists any difference between present and previous sites of Kelussia in terms of their environmental parameters. Results show that there is no significant difference between environmental parameters of present and previous sites of Kelussia. Its seems that factors excepts ecological and biological, such as human factors is impact on Kelussia.