Ontologia

Rivière· 47 segments

L'Orne

Crosses 2 administrative regions : Calvados, Orne

rivière

Total length

279km

Max discharge

58m³/s

Max Strahler

5

Segments matched

47

River geography2 admin regions · 96 communes

Parent watershed

hybas-20804589901182 km²

2 administrative regions crossed (GADM L2)

  • Calvados
    Normandie · France
    88.8 km
    in this dpt
  • Orne
    Normandie · France
    63.4 km
    in this dpt
96 communes (L5)

14 intersecting protected areas

5 more protected areas

1 page = 1 named river (aggregation of 47 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

410 distinct species · 847 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 39 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de L'Orne : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 107 interactions GloBI sur 7 types (connectance 14.4%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
107
Connectance
0.144
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)

Total length

279km

Max discharge

58,0m³/s

Max Strahler

5

Segments matched

47

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.