Rivière· 30 segments

River Usk

Crosses 3 administrative regions : Monmouthshire, Newport, Powys

rivière

Total length

132km

Max discharge

40,1m³/s

Max Strahler

Segments matched

River geography3 admin regions · 0 communes

Parent watershed

hybas-20800497101316 km²

3 administrative regions crossed (GADM L2)

Powys
Wales · United Kingdom
51.1 km
in this dpt
Monmouthshire
Wales · United Kingdom
35.1 km
in this dpt
Newport
Wales · United Kingdom
9.9 km
in this dpt

20 intersecting protected areas

Bannau Brycheiniog
IUCN V
National Park
Usk Bat Sites/ Safleoedd Ystlumod Wysg
IUCN Not Reported
Emerald Network
Mynydd Llangatwg (Mynydd Llangattock)
IUCN IV
Site of Special Scientific Interest
River Usk/ Afon Wysg
IUCN Not Reported
Emerald Network
Sugar Loaf
IUCN V
Nature Reserve
River Usk (Lower Usk)/Afon Wysg (Wysg Isaf)
IUCN IV
Site of Special Scientific Interest
River Usk (Upper Usk) / Afon Wysg (Wysg Uchaf)
IUCN IV
Site of Special Scientific Interest
Afon Wysg (Isafonydd) / River Usk (Tributaries)
IUCN IV
Site of Special Scientific Interest
Craig Y Cilau
IUCN IV
National Nature Reserve

11 more protected areassorted by area

St. Julian'S Park
IUCN Not Reported
Local Nature Reserve
Coed-Y-Person
IUCN IV
Site of Special Scientific Interest
Y Gors
IUCN IV
Site of Special Scientific Interest
Coed Mawr - Blaen-Car
IUCN IV
Site of Special Scientific Interest
Mynydd Llangatwg
IUCN IV
Site of Special Scientific Interest
Caeau Bronydd-Mawr
IUCN IV
Site of Special Scientific Interest
Clytha Park Estate
IUCN V
Nature Reserve
Rhosydd Nant Eithrim
IUCN IV
Site of Special Scientific Interest
Priory Wood
IUCN IV
Site of Special Scientific Interest
Penpergwm Pond
IUCN IV
Site of Special Scientific Interest
Llanover Quarry
IUCN IV
Site of Special Scientific Interest

1 page = 1 named river (aggregation of 30 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

2 303 distinct species · 22 663 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 31 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 River Usk : 21 espèces reliées par 104 interactions GloBI sur 5 types (connectance 21.0%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

104

Connectance

0.210

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)