Volume 13, Issue 4 (12-2019)                   مرتع 2019, 13(4): 537-547 | Back to browse issues page

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Faghihi A, Bashari H, Tarkesh M, Basiri M. Rangelands species as grazing intensity indicator North part of Hormozgan Province, Iran. مرتع 2019; 13 (4) :537-547
URL: http://rangelandsrm.ir/article-1-816-en.html
Department of Range and Watershed Mamnagement, Faculty of Natural Resources, Isfahan University of Technology, Isfahan
Abstract:   (3648 Views)
Response of rangelands species to grazing are different and may give the impression of how heavy the grazing has been. This study aimed at identification of the species that could be used as grazing intensity indicators in North part of Hormozgan province. The plant frequencies of thirty range places with different grazing pressure and relatively homogenous ecological condition were measured using Step point method. Grazing gradient analysis was used to identify indicator species. Once the projected position of the sites in the first axes of Centered Principal Component Analysis (CPCA) showed a clear grazing gradient, the frequency of the plant species was plotted against the values of this axes using Gaussian regression curves. The species with D statistic more than 0.5 and R2 more than 0.3 in the produced regression analysis were considered as indicator species, e.g. five out of thirty. Results indicated that Gymnocarpus decander and Artemisia sieberi could be considered as decreaser, Cymbopogon olivieri as increaser and Peganum harmala and Convolvulus spinosus as invaders in the study area. Result of the study suggests that indicator species could direct local range managers on range condition assessment.
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Type of Study: Research | Subject: Special
Received: 2020/01/17 | Accepted: 2020/01/17 | Published: 2020/01/17

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