Ontologia

Rivière· 14 segments

L'Helpe Majeure

Crosses 2 administrative regions : Hainaut, Nord

rivière

Total length

72km

Max discharge

9,7m³/s

Max Strahler

4

Segments matched

14

River geography2 admin regions · 29 communes

Parent watershed

hybas-2080425450324 km²

2 administrative regions crossed (GADM L2)

  • Nord
    Hauts-de-France · France
    58.8 km
    in this dpt
  • Hainaut
    Wallonie · Belgium
    0.7 km
    in this dpt
29 communes (L5)

15 intersecting protected areas

6 more protected areas

1 page = 1 named river (aggregation of 14 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

885 distinct species · 6 264 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 36 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'Helpe Majeure : 25 espèces reliées par 117 interactions GloBI sur 6 types (connectance 17.6%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
117
Connectance
0.176
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

72km

Max discharge

9,7m³/s

Max Strahler

4

Segments matched

14

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