Floristic list of biological indices based on diatoms - Sélune Observatory

Microbial communities play a major role in the functioning of ecosystems: they are at the base of the food chain (primary production) and participate in the degradation of organic matter. These communities are also known to respond rapidly to environmental changes. Like macro-invertebrates, they can be used as ecological indicators.

Benthic diatoms are the main photosynthetic organisms in this biological community. The relative abundance of the different species is used to calculate an environmental quality index (EQI). Major differences in communities between the upstream and downstream zones were observed when the dams were in place. These differences will change once the dams are removed.

As part of the Sélune observatory, pilot stations have been set up along the main course of the Sélune, distributed from upstream to downstream of the hydroelectric dams. Three stations are located in the former reservoirs of the dams, while the other two, known as the reference stations, are outside the area of influence of the former dams (one downstream and the other upstream). At these stations, aquatic biocenoses (including benthic macroinvertebrates, biofilms, macrophytes, etc.) are monitored. Since September 2014, the stations are ideally sampled every month from April to October (7 annual surveys) using artificial substrates (glass slides placed in the water). In addition to the diatom survey (floristic list, IBD calculation), the chlorophyll-a concentration is measured.



During each campaign, an INRAe experimental sampling protocol is implemented. This protocol involves the immersion (1 month) of glass slides, in situ measurement of chlorophyll-a concentration via BentoTorch and then collection of the biofilm on these glass slides. The biofilm is conditioned in (1) 99.9% ethanol for determination of IBDs and floristic lists (outsourced service, based on standard NF T90-354) and (2) mineral water for measurement of chlorophyll-a concentration using a spectrometer.



Taxon identification is based on version v17 of the TAXREF reference.



The dataset is currently under embargo.

Simple

Date (Creation)
2025-03-04T16:00:00
Edition

2025
Citation identifier
fr-20250303103810-umrsas-selune-v_bioc_biofilm_ind_biofilm
Purpose

This layer gives the lists of flora used to obtain the standardised IBD and IBD biotic indices (EQR).
Status
Planned
Point of contact
Organisation name Individual name Electronic mail address Role

INRAE DECOD

Jean-Marc Roussel

jean-marc.roussel@inrae.fr

Point of contact

INRAE DECOD

Gorzérino Caroline

caroline.gorzerino@inrae.fr

Point of contact

AESN

aesn@aesn.fr

funder

Université de Rennes

Pannard Alexandrine

alexandrine.pannard@univ-rennes.fr

Point of contact

INRAE U3E

Nadine Herrard

nadine.herrard@inrae.fr

Custodian
Maintenance and update frequency
As needed
Maintenance note

Last update: 05/03/2024 with autumn 2024 data
Theme

  • Open data
Theme

  • Limit

INSPIRE themes

  • Environmental monitoring facilities

  • Environnement

GEMET

  • biology

  • environment

  • fauna
Use limitation

Unrestricted use subject to the following compulsory wording on all distribution documents: "Source: INRAE - U3E".
Use limitation

Open licence : https://www.etalab.gouv.fr/licence-ouverte-open-licence

Access constraints
Restricted
Use constraints
Restricted
Other constraints

Data set currently under embargo
Spatial representation type
Vector
Denominator
25000
Language

fre
Topic category
  • Environment
  • Location
N
S
E
W
thumbnail




Begin date
2014-01-01
End date
2027-12-31
Reference system identifier
RGF93 / Lambert-93 (EPSG:2154)
Geometric object type
Point

Distributor

Distributor contact
Organisation name Individual name Electronic mail address Role

UMR 1069 SAS INRA - Agrocampus Ouest

Pole GéoSAS

geosas_adm@framalistes.org

Distributor
Distributor format
Name Version

ESRI Shapefile

1.0

Digital transfer options

OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

 		https://programme-selune.com/fr/observatoire/

Selune Observatory

WWW:LINK-1.0-http--link

 		https://norminfo.afnor.org/norme/nf-t90-354/qualite-de-leau-echantillonnage-traitement-et-analyse-de-diatomees-benthiques-en-cours-deau-et-canaux/95749

Water quality - Sampling, treatment and analysis of benthic diatoms in rivers and canals NF T90-354

OGC:WMS

 		https://geosas.fr/geoserver/selune/ows?service=WMS

v_bioc_biofilm_ind_biofilm

OGC:WFS

 		https://geosas.fr/geoserver/selune/ows?service=WFS

selune:v_bioc_biofilm_ind_biofilm

WWW:DOWNLOAD-1.0-http--download

 		https://geosas.fr/geoserver/selune/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=selune%3Av_bioc_biofilm_ind_biofilm&outputFormat=application%2Fjson

Download ‘Floristic lists of biological indices based on diatoms - Sélune Observatory’ in JSON format

WWW:DOWNLOAD-1.0-http--download

 		https://geosas.fr/geoserver/selune/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=selune%3Av_bioc_biofilm_ind_biofilm&outputFormat=csv

Download ‘Floristic lists of biological indices based on diatoms - Sélune Observatory’ in CSV format

WWW:DOWNLOAD-1.0-http--download

 		https://geosas.fr/geoserver/selune/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=selune%3Av_bioc_biofilm_ind_biofilm&outputFormat=SHAPE-ZIP

Download "Floristic lists of biological indices based on diatoms - Sélune Observatory" au format shapefile

Digital transfer options

No information provided.
Hierarchy level
Dataset

Conformance result

Title

INSPIRE Data Specification for the spatial data theme Elevation
Date (Publication)
2013-12-10
Explanation

Non Evalué
Pass
No
Statement

Floristic lists and abundances obtained in accordance with standard NF T90-354 (November 2021).



The list of fields presented in this dataset is specified in the associated catalogue.

Metadata

File identifier
0b477872-ce4c-4c21-8788-48f03912f05a XML
Metadata language

fre
Character set
UTF8
Parent identifier
e91b4cb1-252d-4ae9-bdf4-24366af7a87c

e91b4cb1-252d-4ae9-bdf4-24366af7a87c
Hierarchy level
Dataset
Date stamp
2025-11-06T16:23:31
Metadata standard name

ISO 19115
Metadata standard version

1.0
Metadata author
Organisation name Individual name Electronic mail address Role

UMR 1069 SAS INRA - Agrocampus Ouest

GéoSAS

geosas_adm@framalistes.org

Point of contact
Other language
Language Character encoding
English
French UTF8
 
 

Overviews

overview

Spatial extent

thumbnail

Keywords

Limit Open data
GEMET

biology environment fauna
INSPIRE themes

Environmental monitoring facilities Environnement


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