tailieunhanh - Báo cáo lâm nghiệp: "Application of digital elevation model for mapping vegetation tiers"

Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "application of digital elevation model for mapping vegetation tiers"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 56 2010 3 112-120 Application of digital elevation model for mapping vegetation tiers D. VOLARÍK Department of Forest Botany Dendrology and Geobiocoenology Faculty of Forestry and Wood Technology Mendel University in Brno Brno Czech Republic ABSTRACT The aim of this paper is to explore possibilities of application of digital elevation model for mapping vegetation tiers altitudinal vegetation zones . Linear models were used to investigate the relationship between vegetation tiers and variables derived from a digital elevation model - elevation and potential global radiation. The model was based on a sample of 138 plots located from the 2nd to the 5th vegetation tier. Potential global radiation was computed in module in geographic information system GRASS. The final model explained 84 of data variability and employed variables were found to be sufficient for modelling vegetation tiers in the study area. Applied methodology could be used to increase the accuracy and efficiency of mapping vegetation tiers especially in areas where such task is considered difficult . agricultural landscape . Keywords altitudinal vegetation zones digital elevation model linear models vegetation tiers In the Czech forest typology and geobiocoenology the term vegetation tier has been introduced as an analogue of more general terms altitudinal vegetation zone or vegetation belt see Zlatnik 1976a . Altitudinal zonation of vegetation has been known for a long time Huggett Cheesman 2002 . Altitudinal vegetation zones or belts have been recognized and studied in many regions in the world Ellenberg 1986 Hegazy et al. 1998 Hemp 2006 Zhang et al. 2006 . Vegetation tiers represent superstructural units in both typological systems for forest and landscape classification in the Czech Republic. The first one the typological system of Forest Management Institute FMI Randuska et al. 1986 Viewegh et al. 2003 finds its use mainly in forestry. The second one is the system