Skip to Main content Skip to Navigation
Journal articles

Typology of diatom communities and the influence of hydro-ecoregions: A study on the French hydrosystem scale

Abstract : By comparing diatom communities in natural and disturbed sites, indicators for different types and levels of anthropogenic disturbance can be found. As a first step, this study aims to describe the different natural and disturbed community types found throughout the French hydrosystem. 836 diatom samples were analysed with an unsupervised neural network, the self-organising-map, a well accepted method for community ordination. 11 different communities were identified, 5 corresponding to non-impacted or slightly impacted conditions and representing the diatom natural variability of our dataset. These 5 communities corresponded to 5 different hydro-ecoregions, i.e. 5 river types with similar geological context and range in altitude. The 6 other communities were typical of rivers under anthropogenic pressure. The influence of natural conditions within the hydro-ecoregions was overwhelmed by the nature and the intensity of the pollution at the sampling stations. This work was done in the context of the application and enforcement of the Water Framework Directive.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02586449
Contributor : Migration Irstea Publications <>
Submitted on : Friday, May 15, 2020 - 11:20:44 AM
Last modification on : Thursday, June 3, 2021 - 5:34:03 PM

Identifiers

Collections

Citation

Juliette Tison-Rosebery, Y.S. Park, Michel Coste, J.G. Wasson, L. Ector, et al.. Typology of diatom communities and the influence of hydro-ecoregions: A study on the French hydrosystem scale. Water Research, IWA Publishing, 2005, 39, pp.3177-3188. ⟨10.1016/j.watres.2005.05.029⟩. ⟨hal-02586449⟩

Share

Metrics

Record views

35