Ontologia

HydroBASINS lev08 watershed · #2080581780

Bassin du Grand Hers

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 3 administrative regions : Ariège, Aude, Haute-Garonne

3% lakePfafstetter: 23214464

Sub-basin area

1 389,7km²

Upstream area

1 389,9km²

Discharge

14,55m³/s

Mean elev.

531m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de l'Ariège392 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

154 communes (GADM L5)

14 intersecting protected areas

5 more protected areas

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

Species present

8 257 distinct species · 272 165 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

272 165 obs · 42 cellules
Obs. / cellule
≥ 18 332
11 053–18 331
7 833–11 052
5 834–7 832
< 5 834

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 du Grand Hers : 27 espèces + 7 bulles famille, 72 interactions GloBI documentées sur 5 types (connectance 12.8%, filtre Serrano α=0.2). Les 7 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
34
Interactions affichées
72
Connectance
0.128
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°

11,6°C

Annual rain

819mm

Moisture idx (CMI)

-0,10

Runoff

358mm/an

PET

906mm

AET

663mm

Mean slope

8,2°

Water table

395cm

Forest

56%

Crops

38%

Urban

1%

Protected

0%

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