Influence of elevations on woody tree species diversity in Nam Kar Natural Reserve of Daklak province, Vietnam

  • Thi Thanh Huong Nguyen Department of Forest resource & Environment management (Frem), Faculty of Agriculture and Forestry, Tay Nguyen University, Le Duan Str. 567, Buon Ma Thuot City, Daklak Province, Vietnam
  • Thi Nhu Quynh Chau Department of Forest resource & Environment management (Frem), Faculty of Agriculture and Forestry, Tay Nguyen University, Le Duan Str. 567, Buon Ma Thuot City, Daklak Province, Vietnam

Abstract

This paper describes the influence of elevation on woody tree species diversity in Nam Kar Natural Reserve of Daklak, of which remote sensing and GIS techniques were used as the tools in biodiversity inventory and assessment. The whole Reserve area was divided into four elevation classes based on DEM (Digital Elevation Model) using GIS technique. Landsat 8 satellite image was employed to stratify the forest into the four strata. A total of 4 transect lines of 100 m in length and 20 m in width (abbreviated as H1, H2, H3, and H4) established in east-west direction representing for 4 elevation classes was used for surveying biodiversity and stand structure. The different diversity indices were compared among the different elevation classes. The relationships between reflectance value of sat- ellite image, forest strata with biodiversity indices were also analysed. The result shows that the diversity of woody tree species is different among elevation classes. Based on sample plots a total of 135 tree species belonging to 42 genera was found in this area. Although a low inverse correlations were found between number of species composition, basal area, and tree density with DNs, most correlation was statistically insignificant 95%. However, a medium relation between forest strata and number of species composition were found with correlation coefficient r = 0.53 (P<0.00) in the area. 

Published
Nov 1, 2016
How to Cite
NGUYEN, Thi Thanh Huong; CHAU, Thi Nhu Quynh. Influence of elevations on woody tree species diversity in Nam Kar Natural Reserve of Daklak province, Vietnam. Journal of Vietnamese Environment, [S.l.], v. 8, n. 2, p. 95-101, nov. 2016. ISSN 2193-6471. Available at: <https://oa.slub-dresden.de/ejournals/jve/article/view/438>. Date accessed: 24 may 2018. doi: http://dx.doi.org/10.13141/jve.vol8.no2.pp95-101.
Section
Research articles

Keywords

Remote Sensing, GIS, biodiversity, woody tree species