Ruisseau· 3 segments
Rio Gangan
Crosses 3 administrative regions : Paço do Lumiar, São José de Ribamar, São Luís
Total length
8km
Max discharge
0,6m³/s
Max Strahler
2
Segments matched
3
River geography3 admin regions · 0 communes
3 administrative regions crossed (GADM L2)
- São José de RibamarMaranhão · Brazil3.8 kmin this dpt
- Paço do LumiarMaranhão · Brazil2.5 kmin this dpt
- São LuísMaranhão · Brazil0.0 kmin this dpt
1 intersecting protected areas
Wetland of International Importance (Ramsar Site)
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
590 distinct species · 2 108 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Rio Gangan : 35 espèces reliées par 61 interactions GloBI sur 5 types (connectance 5.9%, filtre Serrano α=0.2). 11 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
8km
Max discharge
0,6m³/s
Max Strahler
2
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.