Volume 7, Issue 4 (3-2014)                   مرتع 2014, 7(4): 292-303 | Back to browse issues page

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Omidzadeh ardali E, Zare chahuoki M A, Arzani H, Tahmasbi P. Comparison of species diversity indices using multi-scale plots (Case study: Karsanak rangeland in Shahrekord). مرتع 2014; 7 (4) :292-303
URL: http://rangelandsrm.ir/article-1-237-en.html
University of Tehran
Abstract:   (7345 Views)

Studying the species diversity as a main part of biodiversity has great importance to detect changes in the ecosystems. Species diversity can be measured using transect and single-scale plot, nested methods and multi-scale plots. Modified Whittaker plot, Intensive modified Whittaker plot and a new C plot (introduced in this study) were used to measure species diversity in Karsank rangelands in Shahrekord province. The vegetation data was collected from sites with east and west aspects, and light and moderate grazing intensities. In each treatment (a combination of aspects with grazing intensities) three kinds of the studied plots were established with three replications using systematic random sampling. After collecting vegetation data, indices of diversity, richness and evenness of species were calculated using the Past software. Comparisons of species diversity obtained by different plots in different treatments were performed using ANOVA in SPSS software and graphs were plotted using Excel program. The results showed that diversity, richness and evenness indices obtained by various plots did not differ significantly (&alpha= 5%), hence it can be concluded that their performances are relatively similar. Moreover, the numerical values of indices cannot be a convincing criterion for determining the suitable plot. Therefore their precision & accuracy in measuring plant diversity indices and the measurements speed can also be investigated to select appropriate plot in future studies.

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Type of Study: Research | Subject: Special
Received: 2015/12/7 | Accepted: 2015/12/7 | Published: 2015/12/7

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