Ontologia

Ruisseau

Ruisseau des Marnes

Crosses 2 administrative regions : Calvados, Eure

ruisseau

Total length

1km

Max discharge

0,2m³/s

Max Strahler

1

Segments matched

1

River geography2 admin regions · 5 communes

Parent watershed

hybas-20800220801281 km²

2 administrative regions crossed (GADM L2)

  • Eure
    Normandie · France
    1.8 km
    in this dpt
  • Calvados
    Normandie · France
    0.6 km
    in this dpt
5 communes (L5)

2 intersecting protected areas

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

Species present

620 distinct species · 4 132 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Ruisseau des Marnes : 22 espèces reliées par 86 interactions GloBI sur 5 types (connectance 18.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
86
Connectance
0.185
Patrimoniales
0
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

1km

Max discharge

0,2m³/s

Max Strahler

1

Segments matched

1

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