Catalogue GéoSAS
Photosynthetic biofilm study areas- 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, 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.
This layer shows the location of the study sectors used to monitor photosynthetic biofilms and the campaigns carried out.
Simple
- Date ( Creation )
- 2025-03-03T10:38:00
- Edition
- 2025
- Identifier
- fr-20250303103810-umrsas-selune-v_bioc_biofilm_sctr_biofilm
- Purpose
- The purpose of this layer is to locate benthic macroinvertebrate monitoring stations as part of the Sélune Observatory.
- Status
- On going
- Maintenance and update frequency
- As needed
- Maintenance note
- Last update: 09/12/2024 with autumn 2024 data (surber only)
- Keywords ( Theme )
-
- Open data
- Biology, Fauna, Flora
- Keywords
-
- Environmental monitoring facilities
- Thèmes INSPIRE Thèmes INSPIRE INSPIRE topics ( Theme )
-
- Environmental monitoring facilities
- Use limitation
- Unrestricted use subject to the following compulsory wording on all distribution documents: "Source: INRAE - DECOD / 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
))
- Begin date
- 2014-09-01
- 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
- Sélune Observatory ( WWW:LINK-1.0-http--link )
- OnLine resource
-
selune:v_bioc_biofilm_sctr_biofilm_session
(
OGC:WFS
)
Secteurs d'étude des biofilms photosynthétiques - Observatoire Sélune
- OnLine resource
- Download "Photosynthetic biofilm monitoring stations - Sélune Observatory Sélune" JSON file ( WWW:DOWNLOAD-1.0-http--download )
- OnLine resource
- Download "Photosynthetic biofilm monitoring stations - Sélune Observatory" CSV file ( WWW:DOWNLOAD-1.0-http--download )
- OnLine resource
- Download "Photosynthetic biofilm monitoring stations - Selune Observatory" in shapefile format ( WWW:DOWNLOAD-1.0-http--download )
- OnLine resource
-
selune:v_bioc_biofilm_sctr_biofilm_session
(
OGC:WFS
)
Secteurs d'étude des biofilms photosynthétiques - Observatoire Sélune
- Hierarchy level
- Dataset
Conformance result
- Date ( Publication )
- 2013-12-10
- Explanation
- Not rated
- Pass
- No
- Statement
- The monitoring stations were located using a hiking GPS (expected planimetric accuracy <= 20 m).
- Feature catalogue citation
gmd:MD_Metadata
- File identifier
- fd744239-52d3-413e-bc00-8b879b0a5ae0 XML
- Metadata language
- fre
- Character set
- UTF8
- Parent identifier
- Sélune biotic and abiotic observatory e91b4cb1-252d-4ae9-bdf4-24366af7a87c
- Hierarchy level
- Dataset
- Date stamp
- 2025-11-06T16:29:25
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
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