Ontologia

Ruisseau

Petit Drack

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

ruisseau

Total length

6km

Max discharge

0,3m³/s

Max Strahler

1

Segments matched

1

River geography2 admin regions · 5 communes

Parent watershed

hybas-20800224701095 km²

2 administrative regions crossed (GADM L2)

  • Pas-de-Calais
    Hauts-de-France · France
    7.5 km
    in this dpt
  • Nord
    Hauts-de-France · France
    0.1 km
    in this dpt
5 communes (L5)

3 intersecting protected areas

  • Platier D\'Oye

    IUCN IV

    National Nature Reserve

  • Le platier d\'oye

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

  • Platier d'Oye

    IUCN Not Reported

    Special Protection Area (Birds Directive)

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

Species present

1 028 distinct species · 16 555 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 32 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 Petit Drack : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 110 interactions GloBI sur 6 types (connectance 18.5%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
110
Connectance
0.185
Patrimoniales
2
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

6km

Max discharge

0,3m³/s

Max Strahler

1

Segments matched

1

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