Effects of Semi- Circular Bunds on Composition, Biodiversity and Biomass changes of Vegetation in Semi-arid Rangelands of Bushehr Province

Document Type : Original Article


1 Department of Desert Control and Management, Faculty of Agriculture, University of Shiraz

2 Department of Range management, Faculty of Natural Resources, Sari University of Agriculture Sciences & Natural Resources



Semi-circular bunds are one of the useful rainwaters harvesting methods in arid and semi-arid areas for restoration and reclamation of rangelands. The aim of the present study was to evaluate the effects of semi-circular bunds on vegetation indices in semi-arid rangelands of Dashtestan county in Bushehr province. For this purpose, a systematic-randomized sampling method was conducted in the restoration (semi-circular bunds) area and control area. In each plot, the vegetation cover percentage was estimated. To compare the different indices such as species composition, biomass, diversity, and species richness between two areas, a t-test was used. The results showed a significant difference between the two areas in terms of all indices (P<0.05). The mean comparison showed that these practices had a significant effect on 31 plant species. In addition, comparing the means of indices including the number of species, Simpson and Shannon-Wiener diversity indices and Margalef richness indices showed that the restoration practices led to a significant increase in these indices. However, the Pielou evenness index increased significantly in the control area. Generally, in the semi-circular bunds area, the biomass of grasses, forbs, and total biomass was significantly higher than those of the control area. The RDA analysis showed that valuable species such as Atriplex leucoclada, Hippocrepis unisiliquosa, Medicago polymorpha, Medicago rigidula, and Medicago raditaa were more present in the semi-circular bund’s areas. The results showed that constructing semi-circular bunds had a positive effect on the vegetation indices of semi-arid rangelands in Bushehr province.


  1. Abdollahi, V., Zolfaghari, F., Jabbary, J. and Dehghan, M.R. 2016. Effect of crescent pond on soil and vegetation properties in Saravan Rangelands (Sistan and Baluchestan Province). Iranian Journal of Range and Desert Research, 22, (4): 658-672.
  2. Al-Rowaily, S.L., El-Bana, M.I., Al-Bakre, D.A., Assaeed, A.M., Hegazy, A.K. and Ali, M.B. 2015. Effects of open grazing and livestock exclusion on floristic composition and diversity in natural ecosystem of Western Saudi Arabia. Saudi Journal of Biological Sciences. 22: 430-437.
  3. Amici, V., Rocchini, D., Geri, F., Bacaro, G., Marcantonio, M., Chiarucci, A. 2012. Effects of an afforestation process on plant species richness: a retrogressive analysis. Ecological Complexity, 9: 55-62.
  4. Armas, C. and Pugnaire, F.I., 2005. Plant interactions govern population dynamics in a semi arid plant community. Journal of Ecology, 93: 89-97.
  5. Bahmadi, M.H. and Shahriari, A.R. 2016. Effects of different rainfall storage methods on vegetation restoration (Case study: Romeh and Dehno watershed, Nehbandan city). Iranian Journal of Range and Desert Research, 23, (1): 51-57.
  6. Delavari, A., Bashari, H., Tarkesh, M and Mosaddeghi, M.R. 2017. Effects of small micro-catchment semi-circular bunds on the diversity indices and frequency distribution models in Narron rangelands- (Sistan & Baluchistan Province). Journal of Rangeland. 11 (3): 331–341. (In Persian)
  7. Delavari, A., Bashari, H., Tarkesh, M., Mirkazehi,, Mosadeghi, M.R., 2014. Evaluating the effects of semi-circular bunds on soil surface functionality using Landscape Function Analysis. Journal of Rangeland. 8 (3): 251–260. (In Persian)
  8. Ghorbani Moghaddam, M., Farzam, M., Dastorani, M.T., Zadbar, M. and Hoseinzadeh, S. 2016. Effects of Rainwater Harvesting Methods on Initial Establishment of Rangeland Plants in Chahdar Rangelands of Mashhad. Journal of Rainwater Catchment Systems, 4 (2): 39-50.
  9. Heshmati, M., Gheitury, M. and Hosseini, M. 2018. Effects of runoff harvesting through semi-circular bund on some soil characteristics. Global Journal of Environmental Science and Management, 4(2): 207-216.
  10. Holechek, J.L., Pieper, R. D. and Herbel, C. H. 2003. Range management, principal and practices. 5th edition, Prentice Hall, USA, 607 p.
  11. Jankju, M., 2009. Range Development and Improvement. Jahad Daneshgahi Mashhad Press, 237 Pp. (In Persian)
  12. Khadem, K., Jankju, M. and Mesdaghi, M. 2015. An investigation on the most suitable size of curved pits and the best plantation place inside the curves (Case study: Koomiran rangelands, Ghaen, South Khorasan). Iranian Journal of Range and Desert Research, 22, (2): 231-239.
  13. Khosravi, H., Ebrahimi, M. and Rigi, M. 2016. Semi-Circular Bunds Effect on Restoration of Plant Vegetation and Soil Properties in Koteh Rangeland, Sistan and Baloochestan Province, Iran. Journal of Rangeland Science, 6 (4): 355-367.
  14. Leps, J and Smilauer, P. 2014. Multivariate Analysis of Ecological Data using CANOCO 5, 2nd edition. Cambridge University Press. UK, 376 Pp.
  15. Maestre, F.T., Bautista, S., Cortina, J. 2003. Positive, negative, and net effects in grass-shrub interactions in Mediterranean semiarid grasslands. Ecology, 84: 3186-3197.
  16. Mahmoodimoghadam, G., Saghari, M., Rostampour, M. and Chakoshi, B. 2015. Effects of constructing small arc basins system on rangeland production and some soil properties in arid lands (case study: Steppic rangelands of Sarbishe, South Khorasan Province). Journal of Rangeland, 9 (1): 67–75. (In Persian)
  17. Mesdaghi, M. 2007. Range management in Iran. Qodse razavi press, fifth edition, p: 333. (In
  18. Moghim, 2014. Watershed Engineering (Biomechanical, biological and managerical methods). Sobhe entezar Publication. 558 p.
  19. Oweis T and A. Hashem, 2004. Water harvesting and supplemental irrigation for improved water productivity of dry farming system in West Asia and North Africa. Proceeding of the 4th International Crop Science Congress, 26 Sep-1 Oct 2004, Brisbane, Asutralia, also Published on web Site: www. Cropscience.org.au.
  20. Rigi, M., Pakzad, A. and Masoudi Pour. A.R. 2015. Investigation on effects of crescent like–micro cachment on vegetation cover properties in kamarek range, Taftan. Watershed Management Research, 103: 147-153.
  21. Rathore, V.S., Singh, J.P., Bhardwaj, S., Nathawat, N.S., Mahesh Kumar, M. and Roy, M. 2015. Potential of native shrubs Haloxylon salicornicum and Calligonum Polygonoides for restoration of degraded lands in arid western Rajasthan, India. Environmental Management, 55 (1): 205-216.
  22. Saghari, M., Rostampour, M., Mahmoudi Moghaddam, G. and Chakoshi, B. 2019. Investigation of the Effect of Constructing Small Arc Basins System on Vegetation Composition and Biodiversity in Aridland Ecosystemsin the East of Iran (Case study: Rangelands of Sarbisheh, South Khorasan Province). Desert Ecosystem Engineering Journal, 8(23): 23-44.
  23. Zhao, L.J., Su, G., Wu and Gillet, F. 2011. Long-term effects of grazing exclusion on aboveground and belowground plant species diversity in a steppe of the Loess Plateau, China. Plant Ecology and Evolution, 144 (3): 313-320.