Special Areas of Conservation (Habitats Directive) · fra
Vallée du Narais, forêt de Bercé et ruisseau du Dinan
- Area
- 46 km²
- IUCN cat.
- Not Reported
- Year
- 2022
Overview
- Designation
- Special Areas of Conservation (Habitats Directive)
- Established
- 2022
- Managing authority
- See European Environment Agency Geospatial Data Catalogue for more information - https://sdi.eea.europa.eu/catalogue/srv/api/records/be2142b0-7dc4-42e3-afac-f7cc5f1a9ac6
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
1 461 distinct species · 12 501 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Vallée du Narais, forêt de Bercé et ruisseau du Dinan : 32 espèces + 5 bulles famille, 97 interactions GloBI documentées sur 4 types (connectance 14.6%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology3 basins · 1 lakes · 10 rivers
Hydrology metrics for this exact territory
Stream length here
27,3km
Lake surface here
0,10km²
Basins crossed
3
Max stream order
3
Max drainage
8 211km²
Discharge in basins
0,5m³/s
Mean precip.
684mm/an
Mean T°
10,6°C
Moisture idx
-0,18
Max snow
6%
Mean runoff
249mm/an
Mean elev. (basins)
136m
Watersheds crossing here
Lakes (1, top by area)
Rivers / streams (10, ord ≥ 4)
- Le Naraisord 4len here17.86 km78%total23 km
- Le Loirord 5len here4.92 km2%total319 km
- La Souriceord 2len here2.44 km32%total8 km
- La Huneord 2len here1.27 km62%total2 km
- Le Vivierord 1len here0.37 km44%total1 km
- L'Archeord 1len here0.23 km4%total6 km
- La Mérizeord 1len here0.19 km4%total5 km
- L'Auneord 3len here0.05 km0%total27 km
- La Veuveord 3len here≈ tangenttotal24 km
- L'Huisneord 4len here≈ tangenttotal144 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 47.75564, 0.34896
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.