Ontologia

HydroBASINS lev08 watershed · #2080567820

Bassin de la Séoune

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 : Gers, Lot, Lot-et-Garonne, Tarn-et-Garonne

Pfafstetter: 23214305

Sub-basin area

832,6km²

Upstream area

32 953,5km²

Discharge

367,08m³/s

Mean elev.

156m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de l'Auvignon777 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

98 communes (GADM L5)

14 intersecting protected areas

5 more protected areas

  • prairies de puymirol

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.03 km² overlap

  • prairie de lafox

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.02 km² overlap

  • Le Boudouyssou

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.01 km² overlap

  • pelouses calcaires de saint-urcisse

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.01 km² overlap

  • grotte du roc

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.01 km² overlap

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

Species present

4 394 distinct species · 193 958 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

193 958 obs · 47 cellules
Obs. / cellule
≥ 25 917
8 118–25 916
4 072–8 117
3 064–4 071
< 3 064

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

Ecological tissue

Sample of 41 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 Séoune : 29 espèces reliées par 129 interactions GloBI sur 5 types (connectance 14.3%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
43
Interactions affichées
129
Connectance
0.143
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°

12,3°C

Annual rain

775mm

Moisture idx (CMI)

-0,21

Runoff

258mm/an

PET

984mm

AET

651mm

Mean slope

4,2°

Water table

265cm

Forest

0%

Crops

95%

Urban

1%

Protected

0%

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