tailieunhanh - Modeling the Red-shanked douc (Pygathrix nemaeus) distribution in Vietnam using maxent

In this study, we used Maxent, a species distribution modeling approach that is shown to a have high predictive power even with low number of occurrence records, to predict the current distribution of the Red-shanked Douc in Vietnam based on published records. | VNU Journal of Science Earth and Environmental Sciences Vol. 35 No. 3 2019 61-71 Original Article Modeling the Red-shanked Douc Pygathrix nemaeus distribution in Vietnam using Maxent Nguyen Tuan Anh1 Le Duc Minh1 2 Pham Viet Hung2 Vu Thi Duyen1 1Faculty of Environmental Sciences VNU University of Science 334 Nguyen Trai Hanoi Vietnam 2 VNU Central Institute for Natural Resources and Environmental Studies 19 Le Thanh Tong Hanoi Vietnam Received 9 May 2019 Revised 12 July 2019 Accepted 9 August 2019 Abstract The Red-shanked Douc Pygathrix nemaeus is the only douc species recorded in all three countries of Indochina. It is classified as Endangered by IUCN and is believed to have experienced a major drop of more than 50 of its population over the last 40 years. The known distribution of main P. nemaeus populations in Vietnam ranges from Pu Mat National Park Nghe An Province in the North to the Kon Ha Nung Gia Lai Province in the South. In this study we used Maxent a species distribution modeling approach that is shown to a have high predictive power even with low number of occurrence records to predict the current distribution of the Red-shanked Douc in Vietnam based on published records. The results show that P. nemaeus inhabits a region from Nghe An to Kon Tum Province with areas from Ha Tinh Quang Binh Quang Tri Thua Thien Hue Da Nang Quang Nam Provinces exhibiting the highest potential. With all model parameters already listed here studies in the future may incorporate more occurrence records to develop better models or other environmental variables to assess the influence of different factors on the species distribution. The results also suggest that species distribution modeling coupled with a carefully checked and filtered occurrence dataset as well as species-specific model fine-tuning and evaluating can help address many conservation issues in Vietnam. Keywords Maxent Red-shanked Douc Species Distribution Modeling. ________ Corresponding author. E-mail .