Ontologia

HydroBASINS lev08 watershed · #2080568730

Bassin de la Cèze

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 4 administrative regions : Ardèche, Gard, Lozère, Vaucluse

Pfafstetter: 21602340

Sub-basin area

1 357,3km²

Upstream area

1 357,3km²

Discharge

21,35m³/s

Mean elev.

303m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Contre-Canal266 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

124 communes (GADM L5)

19 intersecting protected areas

10 more protected areas

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

Species present

7 475 distinct species · 354 052 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

354 052 obs · 37 cellules
Obs. / cellule
≥ 36 785
16 398–36 784
10 234–16 397
8 550–10 233
< 8 550

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

Ecological tissue

Sample of 33 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 la Cèze : 28 espèces + 5 bulles famille, 70 interactions GloBI documentées sur 5 types (connectance 13.3%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
33
Interactions affichées
70
Connectance
0.133
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°

12,2°C

Annual rain

767mm

Moisture idx (CMI)

-0,20

Runoff

486mm/an

PET

967mm

AET

637mm

Mean slope

7,6°

Water table

348cm

Forest

55%

Crops

28%

Urban

1%

Protected

32%

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