Rivière· 6 segments
Dadugan Oya
Crosses 6 administrative regions : Gampaha, Ja-Ela, Katana, Minuwangoda, Negombo +1
Total length
31km
Max discharge
25m³/s
Max Strahler
4
Segments matched
6
River geography6 admin regions · 0 communes
6 administrative regions crossed (GADM L2)
1 intersecting protected areas
Muthurajawela
IUCN IVSanctuary
1 page = 1 named river (aggregation of 6 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
243 distinct species · 4 640 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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).
Indicateurs du tissu écologique
Tissu écologique de Dadugan Oya : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 39 interactions GloBI sur 3 types (connectance 6.2%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
31km
Max discharge
25,0m³/s
Max Strahler
4
Segments matched
6
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.