Investigation of the Effect of Land Change / Land Cover on the Supply of Habitat Services (Case Study: Ors Sistan Protected Area)

Diversity has experienced a sharp decline over the past 60 years compared to any time in human history. Reducing biodiversity is associated with the degradation of ecosystems, which in turn affects human well-being through the lack of ecosystem service benefits that ecosystems provide. Ecosystems contribute to the conservation of biodiversity at various levels of diversity through the provision of habitat services. The results showed that the lands of garden, agronomic and residential lands were 64%, 6% trench rangelands and 6% reduction of ors and 6%. And semi- dense rangelands of 15% and semi-dense ors 1% increased. The results showed that the lands of garden, agronomic and residential lands were 64%, 6% trench rangelands and 6% ors was Decreased. And semi-condensing rangelands, 15% and semi-dense ors 1% increased. The results showed that the quality of habitat has dropped by about 12,000 hectares over the past 30 years, in other words, the areas covered by quality habitats dropped from 36.98 to 25.25 percent. The results showed that the quality of habitat has dropped by about 12,000 hectares over the past 30 years, in other words, the areas covered by quality habitats dropped from 36.98 to 25.25 percent and 29253 ha of the region (about 26%) had a moderate scarcity index and2405 ha of the region (2.2%) with a high scarcity index, which required the further protection of the habitats of this area. Based on the findings of this study, the most important factors affecting the habitat services and as a result of the wildlife of this region Can be expressed factors such as habitat destruction, unauthorized hunting, cattle grazing, corral, The presence of flock dogs and recent droughts.