Ontologia

Rivière· 3 segments

Nieuwe Merwede

Crosses 3 administrative regions : Altena, Dordrecht, Drimmelen

rivière

Total length

20km

Max discharge

408,9m³/s

Max Strahler

6

Segments matched

3

River geography3 admin regions · 0 communes

Parent watershed

hybas-2080022970729 km²

3 administrative regions crossed (GADM L2)

  • Dordrecht
    Zuid-Holland · Netherlands
    12.9 km
    in this dpt
  • Altena
    Noord-Brabant · Netherlands
    3.9 km
    in this dpt
  • Drimmelen
    Noord-Brabant · Netherlands
    1.5 km
    in this dpt

7 intersecting protected areas

  • NNN-NB

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

  • NNN-ZH

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

  • Biesbosch

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Biesbosch

    IUCN IV

    Nature Conservation Act

  • Biesbosch

    IUCN II

    Wetland of International Importance (Ramsar Site)

  • Biesbosch

    IUCN Not Reported

    Special Protection Area (Birds Directive)

  • De Biesbosch

    IUCN II

    National Park

1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

3 914 distinct species · 979 776 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 Nieuwe Merwede : 27 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) + 5 bulles famille, 49 interactions GloBI documentées sur 3 types (connectance 9.9%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
32
Interactions affichées
49
Connectance
0.099
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

20km

Max discharge

408,9m³/s

Max Strahler

6

Segments matched

3

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