Reviewing the Spectral Variation Hypothesis: Twenty years in the tumultuous sea of biodiversity estimation by remote sensing

Michele Torresani, Christian Rossi, Michela Perrone, Leon T. Hauser, Jean-Baptiste Féret, Vítezslav Moudrý, Petra Símová, Carlo Ricotta, Giles M. Foody, Patrick Kacic, Hannes Feilhauer, Marco Malavasi, Roberto Tognetti, Duccio Rocchini

Abstract: Highlights•We reviewed and discussed recent methodological developments based on SVH.•Ecosystems, indices, data and approaches have been deeply revised.•The uncertainties related to the SVH have been thoroughly analyzed.•Future aspects and new prospective have been highlighted.