Showing 3 results for Life Form
Volume 8, Issue 1 (12-2009)
Abstract
This study was carried out in Kalat highlands of Gonabad located in East of Iran with the altitude of 1100 to 2830 m.a.s.l. The mean annual percipitation and temperature are 143.2 mm and 17.2 C, respectively. The aim of study was to identify and to introduce the flora, to determine chorology of plant species and to define their growth forms. Altogrther 190 plant species belong to 107 genera and 39 families were determined. The most important families were Asteraceae, Poaceae and Lamiaceae. Astragalus and Cousinia were the main genera. The life form spectrum, based on Raunkiaer, revealed that Therophytes with 36.84% and Hemicryptophytes with 36.32% are the dominant life forms. According to Zohary, Chorological characteristics of the plant species showed that most of them were Irano-Turanian elements. About 8 species were endemic to Iran. The species Phlomidoschema parviflorum is a rare and semi-endemic to Gonabad region. According to the IUCN, two categories of plant species viz. vulnerable (VU) and lower risk (LR) were introduced. There were 14 threatened plant species in the area
Volume 8, Issue 2 (10-2009)
Abstract
The extent of area is about 3571 hectars. It is part of Hezarmasjed in north- western Kalat. The average maximum temperture is 20.8 in August and the minimum temperture is -9 in January. A floristic study was done for the area plants and then biological forms and plant chorotypes were identified. In this research, 65 families, 282 genera and 404 species were identified, The largest plant family is Asteraceae with 52 genera and 82 species and the largest genera is Astragalus of Papilionaceae with 19 species. Chief biological forms are: Hemicryptophytes , Therophytes and Cryptophytes. Most of the species (54.45%) belong to Irano -Turanian region.
Javad Mohammadi, Hasan Zaree Maivan, H Ejtehadi, ,
Volume 15, Issue 1 (4-2015)
Abstract
Vegetation of Kasf forest with an area of over 12 ha, located in the east-west direction at a distance of 20 kilometers north of the city of Bardaskan, between 57° and 52' and 30" to 58° and 00' and 00" East longitude and 35° and 22' and 30" to 35° and 30' and 00" North latitude, in a mountainous arid region with a minimum and maximum temperature of -10 and +45° C , respectively and average annual precipitation of 155 mm, at an altitude of about 1600 m above sea level with 15% slope was studied using floristic method 2 years after fire and life forms and geographical distribution of plant species were determined. Sixty nine plant species belonging to 29 families (25 Dicots, 3 monocots and one gymnosperm). The largest families were the mint (Lamiaceae) with 11, Compositeae (Asteraceae) with 9 and carnation family (Caryophyllaceae) with 5 species. The life forms included Therophytes with 36% (25 species), Hemicryptophytes 29% (20 species), Chamaephytes 16% (11 species), Phanerophytes 13% (9 species) and cryptophytes with 6% (4 species). The high percentage of Hemicryptophytes indicated dominance of cold mountainous climate and the presence of Asteraceae species such as harmala (Peganum harmala) showed sever disturbance had taken place in the region and thus, the need for administering greater ecological care and employing more extensive environmental supervision and management was identified.
