VNU Journal of Science Earth and Environmental Sciences, Vol 37, No 4 (2021) 9 21 9 Original Article Roles of Crop Boom (Orange) in Biodiversity Conservation in the Northern Limestone Mountain Region of Vietnam Ngo Ngoc Dung, Le Trong Toan*, Tran Chi Trung, Nguyen Thi Vinh, Le Thi Van Hue VNU Central Institute for Natural Resources and Environmental Studies, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Received 6 September 2020 Revised 23 December 2020; Accepted 03 January 2021 Abstract This stud[.]