Assessing multi-temporal land cover changes in the Mata Nacional da Peneda Gere...

• Author(s): Viana, Helder ; Aranha, José
• Date: 2010
• Persistent ID: http://hdl.handle.net/10400.19/1018
• Origin: Repositório Científico do Instituto Politécnico de Viseu
• Subject(s): Landscape ecology; Spatial patterns analysis; Changes prediction; Landsat 5 TM; Gerês
• Document Type: Conference Object
• Language: English

Description

The present study sought to evaluate land cover evolution between 1995 and 2009, within the Mata Nacional of Peneda Geres (Portugal). This study was based on Landsat TM images classification and GIS procedures, such as Land Change Modeller approach. Landscape diversity and structural changes were analysed by means of Mean Shape Index, Shannon’s Diversity Index and Patch analysis, in order compare landscape metrics and to calculate land cover dynamics. The achieved results enable to state that land cover classes presented significant structural changes. The most significant changes occur in the land cover classes of Pinus pinaster; Quercus robur; Acacia dealbata; and shrub land. The most worrying result was achieved for the Acacia dealbata, which presented a strong invasive behaviour. Landscape metric analysis showed a significant stratification increasing and a dramatic reduction of patch surfaces. In spite of spatial changes observed, the achieved biodiversity indexes are very alike for both dates.