Ontologia

Ruisseau· 53 segments

L'Authie

Crosses 2 administrative regions : Pas-de-Calais, Somme

ruisseau

Total length

109km

Max discharge

20,2m³/s

Max Strahler

3

Segments matched

53

River geography2 admin regions · 81 communes

Parent watershed

hybas-20800224401103 km²

2 administrative regions crossed (GADM L2)

  • Somme
    Hauts-de-France · France
    74.0 km
    in this dpt
  • Pas-de-Calais
    Hauts-de-France · France
    71.0 km
    in this dpt
81 communes (L5)

21 intersecting protected areas

12 more protected areas

1 page = 1 named river (aggregation of 53 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

927 distinct species · 7 564 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 40 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'Authie : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 138 interactions GloBI sur 6 types (connectance 16.8%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
138
Connectance
0.168
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

109km

Max discharge

20,2m³/s

Max Strahler

3

Segments matched

53

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