Ruisseau· 32 segments
Lagan
Crosses 4 administrative regions : Armagh City, Banbridge and Craig, Belfast, NA, Newry, Mourne and Down
Total length
171km
Max discharge
10,8m³/s
Max Strahler
3
Segments matched
32
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
- NANorthern Ireland · United Kingdom41.2 kmin this dpt
- Armagh City, Banbridge and CraigNorthern Ireland · United Kingdom20.6 kmin this dpt
- BelfastNorthern Ireland · United Kingdom14.1 kmin this dpt
- Newry, Mourne and DownNorthern Ireland · United Kingdom3.9 kmin this dpt
11 intersecting protected areas
Mourne
IUCN Not ReportedArea of Outstanding Natural Beauty
Belfast Lough Open Water
IUCN Not ReportedEmerald Network
Belfast Lough Open Water
IUCN Not ReportedMarine Protected Area (OSPAR)
Lagan Valley
IUCN Not ReportedArea of Outstanding Natural Beauty
Belfast Lough
IUCN Not ReportedWetland of International Importance (Ramsar Site)
Belfast Lough
IUCN Not ReportedEmerald Network
Belfast Lough
IUCN Not ReportedMarine Protected Area (OSPAR)
Inner Belfast Lough
IUCN Not ReportedArea of Special Scientific Interest
Belvoir
IUCN Not ReportedArea of Special Scientific Interest
2 more protected areassorted by area
Minnowburn
IUCN VNature Reserve
Clarehill
IUCN Not ReportedArea of Special Scientific Interest
1 page = 1 named river (aggregation of 32 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
1 078 distinct species · 17 130 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 18 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 Lagan : 11 espèces reliées par 26 interactions GloBI sur 5 types (connectance 13.7%, filtre Serrano α=0.2). 9 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
171km
Max discharge
10,8m³/s
Max Strahler
3
Segments matched
32
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.