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Efficiency of Canopy Cover Measurement of Artemisia sieberi Stands by Two Sampling Methods in Different Lengths (Case study: Steppe Vegetation of Baft Region, Iran) | ||
| Environmental Resources Research | ||
| مقاله 2، دوره 5، شماره 1، فروردین 2017، صفحه 13-23 اصل مقاله (1.89 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22069/ijerr.2017.12522.1191 | ||
| نویسندگان | ||
| Reza Bagheri* 1؛ Mohamad Ali Alizadeh2 | ||
| 1Young Researchers and Elite Club, Baft Branch, Islamic Azad University, Baft, Iran | ||
| 2M.Sc. Graduated of range management, Natural resources department, Islamic Azad University, Baft Branch, Baft, Iran. | ||
| چکیده | ||
| This research has been conducted to establish a wheel-point device and evaluate its efficiency (precision, accuracy and time) with respect to the estimation of canopy percent in a pilot Artemisia stand in Khabr region of Baft, Kerman province, Iran in 2015. Several transects with different lengths (30, 60, 90, 120, 150 and 180 m) were established using the randomized sampling block with 5 replicates. Measurement of canopy percent of dominant species and the associated ones was done by transects as linear-contact (control treatment) and wheel-point device. Data standard deviation of each treatment, relative error of each treatment to control and time criterion have been considered as precision, accuracy and time indices for sampling and evaluating the efficiency Results indicated that in the sampling by the means of linear-contact method (control method), the optimum sampling length was given as 30 m concerning three statistical states involving the dominant species, associated ones and total species population. Also, results have shown that in sampling by wheel-point device method in order to consider the statistics of dominant species, the optimum transect length was estimated as 60 m; when the statistics of associated species and total species population are regarded, the optimum length was 120 and 150 m, respectively. According to the results of regression model with respect to data given by wheel-point method and transect (control), determination of coefficient was computed as 57 and 67% for the dominant and associated species, respectively. | ||
| کلیدواژهها | ||
| Wheel-Point؛ Artemisia؛ Precision؛ Efficiency | ||
| مراجع | ||
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Abtahi, S.M., Shahmoradi, A.A., and Zandi Esfahan, E. 2009. Investigation of vegetation dynamics and range conditions in central desert of Iran (Case study: Haftooman, Khoor and Biabanak). Journal of Range Science. 4 (4), 330-339 (In Persian). Abate, T., Ebro, A., and Nigatu, L. 2012. Evaluation of rangeland in arid and semi-arid grazing land of South East Ethiopia. International Journal of Agricultural Science. 2 (7), 221-234 (In Persian). Arzani, H., Beniaz, M., Hamedanian, F., Dehdari, S., and Zare Chahoki, M.A. 2009. Comparison between digital photographic method and visual estimation for estimating cover of two types of the grassland and shrubland. Journal of Range Science. 2 (4), 357-369 (In Persian). Arzani, H., Dehdari, S., and King, G. 2011. Models for estimating range production by cover measurement. Irananian Journal of Range and Desert Research. 18 (1), 1-16 (In Persian). Asadpoor, R., Bagheri, R., Beheshtirad, M., and Najafi, K. 2011. Investigating of estimation of dry forage of Sphaerocoma aucheri Boiss. by vegetative parameters. Journal of Range Science. 5 (3), 344-351.(In Persian). Bagheri, R., Altaha, S.M., and Mohamadi, S. 2014. Effects of grazing management projects on vegetation and some soil physico-chemical properties (Case study: Dehsard region of Kerman province). Irananian Journal of Range and Desert Research. 21 (1), 32-40 (In Persian). Borhani, M. 2001. Comparison of cover and density methods in Artemisia sieberi stands of steppe in Isfahan province. M.Sc. Thesis, University Technology of Isfahan. 126p (In Persian). Canfield, R.H. 1941. Application of the line interception method in sampling range vegetation. Journal of Forestery. 45, 388-394. Fiala, A.C.S. 2003. Forest canopy structure in western Oregon: characterization, methods for estimation, prediction and importance to avian species. M.Sc. Thesis, Oregon State University. 335p. Fiala, A.C.S., Garman, S.L., and Gray, A.N. 2006. Comparison of five canopy cover estimation techniques in the western Oregon Cascades. Forest Ecology and Management. (1-3) 232, 188-197. R. Bagheri & M.A. Alizadeh / Environmental Resources Research 5, 1 (2017) 23 .Godı´nez-Alvarez, J.E., Herrick, M., Mattocks, D., Toledo, J., and Van, Z. 2009. Comparison of three vegetation monitoring methods: Their relative utility for ecological assessment and monitoring.Ecological Indictators, 9, 1001-1008. Gonsamo, A., Petra, D.O., and Pelllikka, P. 2013. Measuring fractional forest canopy element cover and openness – definitions and methodologies revisited. Oikos Journal. 122, 1283-1291. Kgosikoma, O.E., Mojeremane, W., and Harvie, B. 2012. The influence of management systems on range lands conditions under different environments in Botswana. Botswana J. Agric. Appl. Sci. 8 (2), 75 82. Kristen L.K., and Dexter H.L. 2013. A comparison of three methods for measuring local urban tree canopy cover. Arboriculture and Urban Forestry. 39 (2), 62-67. Mesdaqi, M. 2004. Range management in Iran. Fourth Edition, Astan Ghods Razavi press. 330p (In Persian). Moameri, M., Arzani, H., Azarnivand, H., and Zare Chahooki, M.A. 2011. Using photographic method for ground cover and range plant density measurement (Case study: Minavand and Fashandak watershed in Taleghan). Watershed Management Research (Pajouhesh and Sazandegi). 93, 35-45 (In Persian). Mokhtariasl, A., and Mesdaqi, M. 2007. Estimating production of Atriplex verrciferum and Salsola dendroides by using canopy cover and volume parameters. Pajouhesh and Sazandegi. 77, 141-147. (In Persian). Moqadam, M.R. 2005. Range and range management. University of Tehran Press. 470p (In Persian). Mosaee Sanjarei, M., and Basiri, M. 2008. Comparison and evaluation of density measurement methods on Artemisia Sieberi shrub lands in Yazd province. Irananian Journal of Natural Resources. 61 (1), 235-251 (In Persian). Najafian, L., Kavian, A., Ghorbani, J., and Tamartash, R. 2010. Effect of life form and vegetation cover on runoff and sediment yield in rangelands of Savadkooh region, Mazandaran. Irananian Journal of Range and Desert Research. 4 (2), 334-347 (In Persian). Qanbarian, G.A., Mesdaghi, M., and Barani, H. 2009. Investigating the efficiency of various measurement strategies in measuring and assessing the range vegetation of southern Zagros rangeland. Journal of Range Science. 3 (1), 1-16 (In Persian). Shahrakht, T.S., Jankju, M., and Mesdaghi. M. 2013. Effects of shrub canopy on the microclimate and soil properties of steppe rangeland. Journal of Range Science. 3 (3), 213-222. | ||
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