Open Access Research Paper Views (860) Spatial pattern of Pistacia atlantica desf. in zagros forests of Iran Mahsa Karimi, Hamid Jalilvand, Milad Pourahmad J. Biodiv. & Environ. Sci. 5(3), 299-307, September 2014. Keywords: Nearest Neighbor Index, Pistacia atlantica Desf., Qalajeh, Spatial pattern, Winkelmass Index Details