期刊名称：International Journal of Biodiversity and Conservation
电子版ISSN：2141-243X
出版年度：2013
卷号：5
期号：1
页码：20-26
DOI：10.5897/IJBC12.003
语种：English
出版社：Academic Journals
摘要：In the present study, the conservation status of 45 species belonging to 26 families of 22 trees and 23 shrubs were determined on the basis of IUCN conservation criteria in Tehsil Takht-e-Nasrati, District Karak, which was conducted in spring, summer and winter 2010 to 2011. There were 20 (44.44 %) vulnerable, 16 (35.56 %) rare, 7 (15.56 %) endangered and 2 (4.44 %) were infrequent. After two years extensive field studies on the basis of IUCN conservation criteria, we concluded that Gymnosporia royleana is endangered (EN) species. From the study, it was concluded that extinction and declines in plant diversity is due to a range of factors including population growth, high rates of habitat modification and deforestation, over-exploitation, the spread of invasive alien species, pollution and climate change.
