Vegetation Changes Procedure Inside and Outside of Exclosure in Tanglaybid Rangelands of Yazd Province (2000-2005)

Grazing animals affect rangeland vegetation structure and function both directly and indirectly. These effects can be assessed in exclosures. In this study, vegetation changesinside and outside of exclosures of Tanglaybid rangelands,located in south-western part of Yazd province, have been investigated. Vegetation changesstudy was carried out in 3 key areas inside and also 3 key areas outside of exclosure and lasted for 5 years (2000-2005). Every key area included 3 transects of 100 meters long and 40 meters intervals. The transects were selected vertical to slope, including 10 fixed plots (2×1 m2). Vegetation cover, density and frequency percentage of each plot species were measured annually. The random- systematic method was applied as a sampling method. Vegetation changes inside and outside of exclosure were assessed, in a completely random plan, applying Duncan's test (P