Monitoring the phenology of mediterranean natural habitats with multispectral sensors: an analysis based on multiseasonal field spectra
Résumé
Due to their high degree of vegetation heterogeneity,
fragmentation and biodiversity, Mediterranean natural
habitats are difficult to assess and monitor with in-situ
observations solely. Together with standardized ground
plots and regular in-situ measurements, remote sensing is a
powerful monitoring device that can contribute to a better
understanding of the diversity of natural and semi-natural
habitats and to monitor their phenology. In this paper, we
implemented a systematic test of the suitability of
multiseasonal remote sensing data for monitoring the
phenological variations of natural habitats in a
Mediterranean landscape. Six multispectral sensor signals
were simulated for comparison based on their spectral
response curves and in-situ averaged spectra collected at
monthly intervals between February and October 2013
(IKONOS, Landsat 5 TM, Landsat 8, Pléiades, Sentinel-2,
and Worldview-2). The simulations and comparisons
performed in this test showed that Sentinel-2 sensor has the
higher sensitivity to the variations in the coverage of
photosynthetic vegetation thus offering interesting
perspectives for operational monitoring of natural habitats.
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