Wetland of International Importance (Ramsar Site) · GBR
Severn Estuary
- Area
- 241 km²
- IUCN cat.
- IV
- Year
- 1976
Overview
- Designation
- Wetland of International Importance (Ramsar Site)
- IUCN category
- IV · Aire d'habitats / espèces
Gestion active pour maintenir habitats / espèces particuliers
- Established
- 1976
- Managing authority
- Not Reported
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
5 341 distinct species · 187 585 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Severn Estuary : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 116 interactions GloBI sur 6 types (connectance 16.5%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology11 basins · 0 lakes · 31 rivers
Hydrology metrics for this exact territory
Stream length here
28,5km
Basins crossed
11
Max stream order
5
Max drainage
10 975km²
Discharge in basins
3,5m³/s
Mean precip.
877mm/an
Mean T°
9,5°C
Moisture idx
0,23
Max snow
13%
Mean runoff
621mm/an
Mean elev. (basins)
96m
Watersheds crossing here
- Bassin de River Severnsub-area1 209,3 km²overlap18.54 km²8%
- Bassin de River Bruesub-area1 122 km²overlap15.81 km²7%
- Bassin de Little Avon Riversub-area307,3 km²overlap10.88 km²5%
- Bassin de Doniford Streamsub-area748 km²overlap9.91 km²4%
- Bassin de Mounton Brooksub-area209,5 km²overlap9.57 km²4%
- Bassin de Tufts Brooksub-area118,7 km²overlap7.81 km²3%
- Bassin de Rhymney Riversub-area500,5 km²overlap6.43 km²3%
- Bassin de River Parrettsub-area1 667,3 km²overlap4.72 km²2%
- Bassin de River Elysub-area408,2 km²overlap1.16 km²0%
2 more basinssorted by overlap
Rivers / streams (31, ord ≥ 4)
- River Severnord 5len here8.19 km3%total303 km
- River Parrettord 5len here6.42 km10%total67 km
- Gloucester and Sharpness Canalord 2len here2.42 km25%total10 km
- Oldbridge Riverord 2len here1.50 km14%total11 km
- River Avonord 4len here1.13 km1%total123 km
- River Axeord 2len here1.07 km3%total34 km
- River Brueord 3len here1.00 km2%total61 km
- West Brookord 1len here0.98 km28%total4 km
- Holford Streamord 2len here0.64 km63%total1 km
- Bilsham Rhineord 1len here0.61 km45%total1 km
- Bum Brookord 1len here0.56 km15%total4 km
- Doverte Brookord 2len here0.50 km4%total13 km
19 more river segmentssorted by Strahler order + length
- Ferneyley Brookord 1len here0.43 km17%total3 km
- Cone Brookord 1len here0.36 km11%total3 km
- Tarwick Reenord 1len here0.34 km49%total1 km
- River Wyeord 5len here0.31 km0%total276 km
- Clevedon Pillord 2len here0.27 km5%total6 km
- Rhymney Riverord 2len here0.24 km0%total51 km
- Rhosog Fawr Reenord 1len here0.23 km19%total1 km
- Putnell Rhyneord 1len here0.23 km4%total6 km
- Ebbw Riverord 2len here0.22 km1%total21 km
- Forge Brookord 2len here0.21 km2%total14 km
- Stockwell Brookord 1len here0.18 km10%total2 km
- Olveston Mead Rhineord 2len here0.18 km3%total5 km
- Nedern Brookord 2len here0.16 km2%total6 km
- Cockercombeord 2len here0.06 km1%total12 km
- Mounton Brookord 2len here0.04 km0%total12 km
- Hawse Reenord 1len here0.04 km1%total3 km
- Windmil Reenord 2len here0.00 km0%total1 km
- Tufts Brookord 2len here≈ tangenttotal8 km
- Uphill Great Rhyneord 2len here≈ tangenttotal4 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 51.69157, -2.53462
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.