Ruisseau· 11 segments
La Rizonne
Crosses 2 administrative regions : Charente, Dordogne
Total length
30km
Max discharge
2,8m³/s
Max Strahler
3
Segments matched
11
River geography2 admin regions · 11 communes
2 administrative regions crossed (GADM L2)
11 communes (L5)For countries with L5
- Saint-Aulaye5.98 km
- Vanxains4.18 km
- Siorac-de-Ribérac3.44 km
- Saint-Privat-des-Prés3.22 km
- Festalemps3.02 km
- Saint-Vincent-Jalmoutiers2.83 km
- La Jemaye2.48 km
- Ponteyraud1.72 km
- Bonnes0.48 km
- Saint-André-de-Double0.44 km
- Servanches0.00 km
3 intersecting protected areas
Vallée de la Dronne de Brantôme à sa confluence avec l'Isle
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Vallées de la Double
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
vallee de la rizonne
IUCN IVLand acquired by a regional conservatory of natural areas
1 page = 1 named river (aggregation of 11 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
677 distinct species · 4 052 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Rizonne : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 5 bulles famille, 65 interactions GloBI documentées sur 5 types (connectance 12.3%, 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).
Hydrology (HydroRIVERS v10)
Total length
30km
Max discharge
2,8m³/s
Max Strahler
3
Segments matched
11
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.