Ontologia

HydroBASINS lev08 watershed · #5080502550

Bassin de Severn River

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 : Southern Downs, Tenterfield

Pfafstetter: 56469985

Sub-basin area

455,5km²

Upstream area

1 317,2km²

Discharge

2,21m³/s

Mean elev.

750m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Dumaresq River46 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Sundown

    IUCN II

    National Park

    116.60 km² overlap

  • Sundown

    IUCN VI

    Resources Reserve

    25.85 km² overlap

  • Donnybrook

    IUCN Ia

    Nature Reserve

    0.00 km² overlap

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

Species present

1 214 distinct species · 58 611 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

58 611 obs · 9 cellules
Obs. / cellule
≥ 39 736
39 736–39 735
2 535–39 735
1 084–2 534
< 1 084

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

Ecological tissue

Sample of 29 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 Severn River : 27 espèces reliées par 25 interactions GloBI sur 3 types (connectance 6.2%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
25
Connectance
0.062
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°

15,6°C

Annual rain

776mm

Moisture idx (CMI)

-0,44

Runoff

45mm/an

PET

1 387mm

AET

658mm

Mean slope

8,7°

Water table

650cm

Forest

64%

Crops

49%

Urban

0%

Protected

31%

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