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Mise au point d’un indice diatomique pour les cours d’eau de la Réunion (IDR) : Rapport final sur la démarche d’élaboration de l’indice (Version finale, 05-02-2013)

Abstract : The WFD must be applied in the French overseas departments as in the European continental context. However, the abiotic environment, as the biological species living there, constitute a very specific biogeographical context making it impossible to use existing biological indices developed for continental Europe. The Reunion Water Office decided to carry on a specific research and development program, implemented from 2008 to 2012 by the Asconit Consultants - Irstea (ex-Cemagref) consortium. The study that led to the genesis of the IDR (Reunion Diatom Index) was based on the acquisition of approximately 370 diatom communities samplings composed of species encountered on site, and of associated data of water chemistry, obtained on a network 56 sites during five sampling campaigns carried out along two different seasons. The analysis of these data allowed : 1) more or less consolidated characterization of ecological preferences of 343 species; 2) identification of diatom communities standard features corresponding to particular environmental conditions (natural, altered); and 3), ultimately, the development of this new IDR index that mobilizes ecological quality profiles of 172 occurrent enough freshwater species. This index built on a original design principle measures the alteration of water quality from the accumulated alteration messages worn by 48 alert taxa called "Taxa -", whose presence means unquestionable anthropogenic degradation of water
Mots-clés : REUNION ILE DOM
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https://hal.inrae.fr/hal-02600968
Contributor : Migration Irstea Publications <>
Submitted on : Saturday, May 16, 2020 - 5:44:14 AM
Last modification on : Thursday, June 3, 2021 - 5:34:03 PM

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  • HAL Id : hal-02600968, version 1
  • IRSTEA : PUB00043454

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Sébastien Boutry, Gilles Gassiole, Juliette Tison-Rosebery, J.L. Giraudel, F. Pérès, et al.. Mise au point d’un indice diatomique pour les cours d’eau de la Réunion (IDR) : Rapport final sur la démarche d’élaboration de l’indice (Version finale, 05-02-2013). [Rapport de recherche] irstea. 2013, pp.130. ⟨hal-02600968⟩

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