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