What is a permanent plot?

Three types of permanent plots are considered in this project.

  • Plots regularly sampled, marked on the field (posts, carved signs, ...) with a precise description (e.g., Pauli et al. 2010).

MD0_Historique Recent.jpg

Picture of a permanent plot set up in 1948 by W. Lüdi along Aletsch glacier and revisited in 2005


  • Relevés published in a book or article, with a precise description, coordinates, a sketch or photograph which allow it to be found again as precisely as possible (e.g., Matteodo et al. 2016).

Combe a neige Rechy_Magali.jpg (plot 3937)

Phytosociological relevé in a snowbed inventoried by J.-L. Richard in 1977 and relocated in 2014 on the basis of precise coordinates and the topographical description (Photo M. Matteodo)


  • Complete list of species on a summit, with the limit (altitude) of the sampled area. The limits of a new sampling will probably not be very precise, but the large area will compensate the lack of precision (e.g., Vittoz et al. 2008;Matteodo et al. 2013).

Piz Calderas Modifie.jpg

Piz Calderas (GR), 3397 m: J. Braun-Blanquet inventoried the speices on the last 13 meters in 1911


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Dr Pascal Vittoz - UNIL IDYST - Géopolis - CH-1015 Lausanne
Tel. +41 21 692 43 67