Volume 5, Issue 17 (12-2016)                   ijae 2016, 5(17): 37-49 | Back to browse issues page



DOI: 10.18869/acadpub.ijae.5.17.37

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Safaei M, Bashari H, Shirmardi H A. Evaluating the Effects of Study Scale on Spatial Patterns of three Range Plant Species Using Quadrate Indices and Point Pattern Analysis in Chaharmahal- Bakhtirai Province Rangelands. ijae. 2016; 5 (17) :37-49
URL: http://ijae.iut.ac.ir/article-1-788-en.html

Isfahan Univ. of Technol., Isfahan. Iran.
Abstract:   (948 Views)

This study aimed to investigate the spatial patterns of Acanthophyllum microcephalum Boiss, Nepeta glomerulosa Boiss and Hertia angustifolia and evaluate the effects of study scale on spatial patterns of three range plant species in Ghale-Gharak research-station located in Shahr-e-Kord. 40 points with a distance of five meters from each other were selected for sampling of vegetation along four 50 m transects using a random-systematic approach. The species spatial patterns were measured by 6 different distance-based methods including Hopkines, Johnson-and-Zimer, Eberhardt, Holgate, Hines and T-Square-index. A 100 m2 reference site (10 by 10 m) was selected to record the species co-ordinates and conduct point pattern analysis. The spatial patterns of the species were determined in 3 scales of 10×10, 5×10 and 5×5 meters to highlight the effects of scale on spatial patterns of vegetation. According to the results, H. angustifolia showed randomized spatial patterns due to its seed dispersal ability. N. glomerulosa and A. microcephalum showed a clustered spatial pattern beacuse their seed are in achene form and fall next to these species. All the 3 species had a clustered pattern when the scale of point pattern analysis was decreased. Identifying these plant spatial patterns and their controlling factors) such as seed dispersal mechanisms of the species and sampling scale) are required to select the best sampling strategy in rangeland assessment programs.

Full-Text [PDF 668 kb]   (397 Downloads)    
Type of Study: Research | Subject: General

Add your comments about this article : Your username or Email:
Write the security code in the box

Send email to the article author


© 2015 All Rights Reserved | Iranian Journal of Applied Ecology

Designed & Developed by : Yektaweb

تحت نظارت وف ایرانی آسپا-وف