1. State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences , Beijing 100101 , P.R. China
2. College of Resources and Environment, University of Chinese Academy of Sciences , Beijing 100039 , P.R. China
3. Department of Environmental Sciences, Kohat University of Science and Technology , Kohat 26000 , Pakistan
4. Department of Environmental Sciences, University of Peshawar , Peshawar, Khyber Pakhtunkhwa 25120 , Pakistan
5. Institute of Agriculture and Life Sciences, Gyeongsang National University , Jinju 52828 , Republic of Korea