Ontologia

HydroBASINS lev08 watershed · #2080359860

Bassin de River Severn

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 2 administrative regions : NA, Powys

Pfafstetter: 23301470

Sub-basin area

608,2km²

Upstream area

2 551,2km²

Discharge

73,57m³/s

Mean elev.

115m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de River Severn1620 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

11 165 distinct species · 548 907 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

548 907 obs · 21 cellules
Obs. / cellule
≥ 86 508
55 427–86 507
32 724–55 426
17 868–32 723
< 17 868

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 34 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

Indicateurs du tissu écologique

Tissu écologique de Bassin de River Severn : 18 espèces reliées par 121 interactions GloBI sur 5 types (connectance 18.2%, filtre Serrano α=0.2). 19 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
121
Connectance
0.182
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

8,6°C

Annual rain

786mm

Moisture idx (CMI)

0,21

Runoff

622mm/an

PET

616mm

AET

503mm

Mean slope

2,1°

Water table

102cm

Forest

0%

Crops

30%

Urban

7%

Protected

9%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)