Rivière· 4 segments

Oude Maasje

Crosses 5 administrative regions : Altena, Drimmelen, Geertruidenberg, Oosterhout, Waalwijk

rivière

Total length

12km

Max discharge

405,1m³/s

Max Strahler

Segments matched

River geography5 admin regions · 0 communes

Parent watershed

hybas-2080022970729 km²

5 administrative regions crossed (GADM L2)

Geertruidenberg
Noord-Brabant · Netherlands
11.1 km
in this dpt
Oosterhout
Noord-Brabant · Netherlands
6.2 km
in this dpt
Waalwijk
Noord-Brabant · Netherlands
4.6 km
in this dpt
Altena
Noord-Brabant · Netherlands
0.9 km
in this dpt
Drimmelen
Noord-Brabant · Netherlands
0.0 km
in this dpt

8 intersecting protected areas

NNN-NB
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
Langstraat
IUCN IV
Nature Conservation Act
Langstraat
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)

1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

3 568 distinct species · 96 247 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 43 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 Oude Maasje : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 96 interactions GloBI sur 5 types (connectance 10.1%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.102

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)