Ontologia

Ruisseau

Kromme Aar

Crosses 4 administrative regions : Alphen aan den Rijn, Leiden, Leiderdorp, Zoeterwoude

ruisseau

Total length

3km

Max discharge

8m³/s

Max Strahler

3

Segments matched

1

River geography4 admin regions · 0 communes

Parent watershed

hybas-20800230401024 km²

4 administrative regions crossed (GADM L2)

1 intersecting protected areas

  • NNN-ZH

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

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

Species present

2 377 distinct species · 170 444 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 Kromme Aar : 15 espèces reliées par 142 interactions GloBI sur 5 types (connectance 22.5%, filtre Serrano α=0.2). 21 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
142
Connectance
0.225
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

3km

Max discharge

8,0m³/s

Max Strahler

3

Segments matched

1

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