Ontologia

Rivière· 23 segments

La Sienne

Crosses 2 administrative regions : Calvados, Manche

rivière

Total length

98km

Max discharge

19,2m³/s

Max Strahler

4

Segments matched

23

River geography2 admin regions · 35 communes

Parent watershed

hybas-2080021860764 km²

2 administrative regions crossed (GADM L2)

  • Manche
    Normandie · France
    67.4 km
    in this dpt
  • Calvados
    Normandie · France
    0.0 km
    in this dpt
35 communes (L5)

8 intersecting protected areas

1 page = 1 named river (aggregation of 23 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

283 distinct species · 1 612 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 45 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 La Sienne : 39 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 97 interactions GloBI sur 5 types (connectance 9.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
47
Interactions affichées
97
Connectance
0.090
Patrimoniales
1
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

98km

Max discharge

19,2m³/s

Max Strahler

4

Segments matched

23

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