Ruisseau
L'Ourse
Crosses 2 administrative regions : Haute-Garonne, Hautes-Pyrénées
Total length
26km
Max discharge
2m³/s
Max Strahler
2
Segments matched
1
River geography2 admin regions · 23 communes
2 administrative regions crossed (GADM L2)
- Hautes-PyrénéesOccitanie · France9.8 kmin this dpt
- Haute-GaronneOccitanie · France0.0 kmin this dpt
23 communes (L5)For countries with L5
- Izaourt1.85 km
- Gembrie1.76 km
- Anla1.40 km
- Bramevaque1.05 km
- Sarp0.83 km
- Troubat0.82 km
- Mauléon-Barousse0.80 km
- Loures-Barousse0.52 km
- Créchets0.42 km
- Aveux0.17 km
- Antichan0.13 km
- Valcabrère0.00 km
- Ilheu0.00 km
- Ourde0.00 km
- Sacoué0.00 km
- Samuran0.00 km
- Barbazan0.00 km
- Thèbe0.00 km
- Luscan0.00 km
- Bertren0.00 km
- Saint-Bertrand-de-Comminges0.00 km
- Cazarilh0.00 km
- Gaudent0.00 km
3 intersecting protected areas
Garonne, Ariège, Hers, Salat, Pique et Neste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Chaînons calcaires du Piémont Commingeois
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Biotope Protection Order
1 page = 1 named river (aggregation of 1 HydroRIVERS v10 segment). Spatial join cached after first hit.
Species present
1 513 distinct species · 13 532 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 L'Ourse : 26 espèces reliées par 78 interactions GloBI sur 4 types (connectance 16.8%, filtre Serrano α=0.2). 5 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
26km
Max discharge
2,0m³/s
Max Strahler
2
Segments matched
1
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.