Ruisseau

Saint-Lazare

Crosses 3 administrative regions : Oise, Seine-Maritime, Somme

ruisseau

Total length

1km

Max discharge

2,6m³/s

Max Strahler

Segments matched

River geography3 admin regions · 9 communes

Parent watershed

hybas-2080022360755 km²

3 administrative regions crossed (GADM L2)

Seine-Maritime
Normandie · France
4.2 km
in this dpt
Somme
Hauts-de-France · France
1.4 km
in this dpt
Oise
Hauts-de-France · France
0.1 km
in this dpt

9 communes (L5)For countries with L5

2 intersecting protected areas

Vallée de la Bresle
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
le larris du berger
IUCN IV
Land acquired by a regional conservatory of natural areas

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

Species present

914 distinct species · 5 983 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 35 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

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Saint-Lazare : 29 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 5 types (connectance 15.0%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.150

Patrimoniales

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)