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A critique of the spectral species concept: are satellites diamonds in the sky?

BIOCHANGE SEMINAR SERIES

Oplysninger om arrangementet

Tidspunkt

fredag 4. juni 2021,  kl. 14:00 - 15:00

Sted

Online

Foredragsholder: PROF. DUCCIO ROCCHINI, Alma Mater Studiorum University of Bologna

ABSTRACT:

In the light of unprecedented change in global biodiversity, real-time and accurate ecosystem and biodiversity assessments are becoming increasingly essential. This is a challenge especially for large areas. Nowadays, mapping sensors provide images that incorporate wavelengths that cannot be seen nor imagined with the human eye. What a success for Leibniz or Newton! This is also now accomplished at unprecedented spatial resolutions, defined by the pixel size of images, achieving less than a meter for some satellite images and just millimeters for drone imagery. Thanks to different modelling techniques, it is possible to create a cutting-edge framework for the study of functional diversity change in space and time over different spatial scales and variable dimensions. Among them, the spectral species concept - an algorithm that clusterizes pixels with a similar spectral signal (referred to as "spectral species'') - has brought attention, due to its versatility. In fact, it can be adapted to different levels of diversity organizational levels, from single individuals to entire habitats. The aim of this talk is to introduce the ecological functioning principles of the spectral species concept and to deeply discuss complexities and potentials of such a challenging approach.

Host: Prof. Signe Normand, Department of Biology, Aarhus University.

Contact: Anne Blach Overgaard: anne.overgaard[@]bio.au.dk to join.