Catalogue GéoSAS
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 various 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, the stations are 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.
This layer gives the IBD and EQR (normalised) index value for a station during a campaign.
Simple
- Date ( Creation )
- 2025-03-05T16:00:00
- Edition
- 2025
- Identifier
- fr-20250303103810-umrsas-selune-v_bioc_biofilm_eval_biofilm
- Purpose
- This layer gives the results obtained for the IBD and IBD EQR indices
- Status
- On going
- 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
- fauna
- environment
- 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
- Other restrictions
- Use constraints
- License
- Other constraints
- No public access restriction
- 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
-
v_bioc_biofilm_eval_biofilm
(
OGC:WMS
)
Indices biologiques basés sur les biofilms - Observatoire Sélune
- OnLine resource
-
selune:v_bioc_biofilm_eval_biofilm
(
OGC:WFS
)
Indices biologiques basés sur les biofilms - Observatoire Sélune
- OnLine resource
- Download ‘Biological indices based on diatoms - Sélune Observatory’ in JSON format ( WWW:DOWNLOAD-1.0-http--download )
- OnLine resource
- Download "Biological indices based on biofilms - Sélune Observatory" in CSV format ( WWW:DOWNLOAD-1.0-http--download )
- OnLine resource
- Download ‘Biological indices based on diatoms - Sélune Observatory’ in shapefile format ( 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
- 189012a1-cced-488e-8d3a-cf5cb28a7708 XML
- Metadata language
- fre
- Character set
- UTF8
- Parent identifier
- Sélune scientific program 32b2d23e-0f67-46fb-ad72-110514f1c8ee
- Hierarchy level
- Dataset
- Date stamp
- 2025-04-02T16:06:38
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
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