A comparative evaluation of spectral vegetation indices for the estimation of biophysical characteristics of mediterranean semi-deciduous shrub communities

T. Calvão, J. M. Palmeirim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Human civilizations have made intensive use of the Mediterranean Basin for millennia, resulting in a profound impact on the natural ecosystems. Nowadays, the drier zones with degraded soils are covered with drought semi-deciduous plant communities. The aim of this study was to compare the ability of various spectral vegetation indices (VIs) computed from a Landsat Thematic Mapper (TM) image to discriminate different vegetation biophysical parameters of these communities and thus to assess their capability to monitor long-term vegetation changes. It was found that although semi-deciduous plants display a spectral behaviour similar to that of semi-arid vegetation, VIs can estimate not only vegetation abundance but also changes in vegetation structure. Normalized difference VIs are highly correlated to vegetation amount-related parameters while soil-related VIs respond basically to canopy structural parameters. Our results indicate that satellite imagery can be used to map biomass in Mediterranean scrubland regions, and show that it has the potential to discriminate types of semi-deciduous shrub communities with different crown architectures.

Original languageEnglish
Pages (from-to)2275-2296
Number of pages22
JournalInternational Journal Of Remote Sensing
Volume32
Issue number8
DOIs
Publication statusPublished - 1 Jan 2011

Keywords

  • Chlorophyll
  • Vegetation
  • Hyperspectral reflectance

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