Ruisseau· 6 segments
La Course
Crosses 1 administrative regions : Pas-de-Calais
Total length
25km
Max discharge
3m³/s
Max Strahler
3
Segments matched
6
River geography1 admin regions · 18 communes
1 administrative regions crossed (GADM L2)
- Pas-de-CalaisHauts-de-France · France21.3 kmin this dpt
18 communes (L5)For countries with L5
- Beussent4.66 km
- Bezinghem3.21 km
- Montcavrel2.76 km
- Doudeauville2.68 km
- Neuville-sous-Montreuil2.05 km
- Bernieulles1.45 km
- Inxent1.31 km
- Estrée1.30 km
- Parenty0.99 km
- Estréelles0.85 km
- Alette0.00 km
- Attin0.00 km
- Recques-sur-Course0.00 km
- Cormont0.00 km
- Enquin-sur-Baillons0.00 km
- Zoteux0.00 km
- La Madelaine-sous-Montreuil0.00 km
- Montreuil0.00 km
4 intersecting protected areas
Caps Et Marais D\'Opale
IUCN VRegional Nature Park
Landes, mares et bois acides du Plateau de Sorrus Saint Josse, prairies alluviales et bois tourbeux en aval de Montreuil
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
basse vallee de la canche
IUCN IVLand acquired by a regional conservatory of natural areas
marais de montreuil
IUCN IVLand acquired by a regional conservatory of natural areas
1 page = 1 named river (aggregation of 6 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
875 distinct species · 8 487 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 La Course : 25 espèces reliées par 84 interactions GloBI sur 6 types (connectance 18.1%, filtre Serrano α=0.2). 6 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
25km
Max discharge
3,0m³/s
Max Strahler
3
Segments matched
6
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.