Ruisseau
Merrien
Crosses 1 administrative regions : Finistère
Total length
2km
Max discharge
0,4m³/s
Max Strahler
1
Segments matched
1
River geography1 admin regions · 2 communes
1 administrative regions crossed (GADM L2)
- FinistèreBretagne · France6.3 kmin this dpt
2 communes (L5)For countries with L5
- Moëlan-sur-Mer6.34 km
- Clohars-Carnoët0.00 km
1 intersecting protected areas
Presqu\'ile de merrien
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1 page = 1 named river (aggregation of 1 HydroRIVERS v10 segment). Spatial join cached after first hit.
Species present
1 296 distinct species · 9 346 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Merrien : 17 espèces reliées par 116 interactions GloBI sur 6 types (connectance 20.7%, filtre Serrano α=0.2). 17 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
2km
Max discharge
0,4m³/s
Max Strahler
1
Segments matched
1
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.