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Floristic lists 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
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
INRAE DECOD - Jean-Marc Roussel ( )
65 rue de Saint-Brieuc - CS 84215 Rennes 35042 France

+33 2 23 48 57 86
Point of contact
INRAE DECOD - Gorzérino Caroline ( )

funder
AESN - ( )
1, rue de la Pompe - BP 70087 HEROUVILLE SAINT-CLAIR Cedex 14203 France

02 31 46 20 20
Point of contact
Université de Rennes - Pannard Alexandrine

Custodian
INRAE U3E - Nadine Herrard

Maintenance and update frequency
As needed
Maintenance note
Last update: 05/03/2024 with autumn 2024 data
Keywords ( Theme )
  • Open data
Keywords ( Theme )
  • Limit
Thèmes INSPIRE Thèmes INSPIRE INSPIRE themes ( Theme )
  • Environmental monitoring facilities
  • Environnement
GEMET GEMET ( Theme )
  • 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
Metadata 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
UMR 1069 SAS INRA - Agrocampus Ouest - Pole GéoSAS
65 rue de Saint-Brieuc Rennes cedex 35042 France

Name
ESRI Shapefile
Version
1.0
OnLine resource
Selune Observatory ( WWW:LINK-1.0-http--link )
OnLine resource
Water quality - Sampling, treatment and analysis of benthic diatoms in rivers and canals NF T90-354 ( WWW:LINK-1.0-http--link )

This document specifies a method for sampling, preparing, identifying and establishing relative proportions of benthic diatoms with a view to compiling a floristic list, particularly for the purpose of assessing water quality. It applies to the continental part of a natural or artificial watercourse and to canals in mainland France. It may also be applied in overseas departments and collectivities, where this approach is relevant and appropriate (hereinafter referred to as DROM-COM territories).

OnLine resource
v_bioc_biofilm_ind_biofilm ( OGC:WMS )

Listes floristiques des indices biologiques basés sur les diatomées - Observatoire Sélune

OnLine resource
selune:v_bioc_biofilm_ind_biofilm ( OGC:WFS )

Listes floristiques des indices biologiques basés sur les diatomées - Observatoire Sélune

OnLine resource
Download ‘Floristic lists of biological indices based on diatoms - Sélune Observatory’ in JSON format ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
Download ‘Floristic lists of biological indices based on diatoms - Sélune Observatory’ in CSV format ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
Download "Floristic lists of biological indices based on diatoms - Sélune Observatory" au format shapefile ( WWW:DOWNLOAD-1.0-http--download )
Hierarchy level
Dataset

Conformance result

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.

Feature catalogue citation
  • Observatoire Sélune - Dictionnaire des attributs Listes floristiques des indices biologiques basés sur les diatomées

gmd:MD_Metadata

File identifier
0b477872-ce4c-4c21-8788-48f03912f05a XML
Metadata language
fre
Character set
UTF8
Parent identifier
Sélune scientific program 32b2d23e-0f67-46fb-ad72-110514f1c8ee
Hierarchy level
Dataset
Date stamp
2025-04-02T17:18:16
Metadata standard name
ISO 19115
Metadata standard version
1.0
Point of contact
UMR 1069 SAS INRA - Agrocampus Ouest - GéoSAS ( )
65 rue de Saint-Brieuc - CS 84215 Rennes France 35042 France

00 33 (0)2 98 95 99 68 http://geowww.agrocampus-ouest.fr

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