Ruisseau· 7 segments
Tolka
Crosses 3 administrative regions : Dublin City, Fingal, Ratoath
Total length
44km
Max discharge
3,1m³/s
Max Strahler
3
Segments matched
7
River geography3 admin regions · 0 communes
3 administrative regions crossed (GADM L2)
- RatoathMeath · Ireland18.4 kmin this dpt
- Dublin CityDublin · Ireland9.8 kmin this dpt
- FingalDublin · Ireland8.4 kmin this dpt
3 intersecting protected areas
Dublin Bay
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
South Dublin Bay and River Tolka Estuary SPA
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Wetland of International Importance (Ramsar Site)
1 page = 1 named river (aggregation of 7 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
574 distinct species · 4 241 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Tolka : 16 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 92 interactions GloBI sur 6 types (connectance 21.1%, filtre Serrano α=0.2). 14 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
44km
Max discharge
3,1m³/s
Max Strahler
3
Segments matched
7
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.