Effective environmental factors on of plants diversity in Taleghan rangelands (Case study: Veshteh rangelands)
Abstract:
Changes in species diversity may result from relationship between species, environmental and human factors. In this study, the role of environmental and human factors (grazing and land use changes) was investigated on the species diversity changes in pastures around the Veshteh village located in middle Taleghan region. Five plant types were identified in this region that one of them was from abandoned agricultural lands, another one was near the watering point with intensive grazing and 3 other types include average, light and without grazing types. Sampling was done using 4 transects with 150 meters length and 15 plots of 1 m2 were placed 10 meters apart from each other along each transect. In the beginning and end of each transect a profile excavated and soil samples from 0- 30 cm depth were taken. After data collection, heterogeneity, uniformity and species richness indices were calculated using Past and Ecological methodology. Principle component analysis also used to determine the most important factors affecting species richness. Results of principle component analysis showed that texture, organic matter, nitrogen, height, electrical conductivity and PH affect the diversity changes in the region. Besides environmental factors, effect of human factors such as grazing and land use conversion was investigated on species diversity but these factors didn’t recognized effective on diversity of this region, but despite the impact of these factors, the diversity indices values were high. Rank-abundance model also was used to illustrate the distribution pattern of species in studied types. Results indicate that all types had log normal distribution and represent relatively stable plant communities with number of species that their average abundance was very high.
Language:
Persian
Published:
Journal of Plant Research, Volume:28 Issue: 2, 2015
Pages:
307 to 315
magiran.com/p1500195  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!