Ontologia

HydroBASINS lev08 watershed · #2080555420

Bassin de l'Alzou

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 1 administrative regions : Lot

Pfafstetter: 23216054

Sub-basin area

340,7km²

Upstream area

340,8km²

Discharge

4,76m³/s

Mean elev.

332m

Administrative coverage

Hydrographic chain

Drains into

Receives from 0 basins

Source / headwater (no upstream basin)

1 dept-equivalent regions (GADM L2)

35 communes (GADM L5)

9 intersecting protected areas

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

Species present

4 839 distinct species · 99 166 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

99 166 obs · 18 cellules
Obs. / cellule
≥ 16 614
12 550–16 613
5 410–12 549
3 957–5 409
< 3 957

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

Ecological tissue

Sample of 32 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 l'Alzou : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 101 interactions GloBI sur 5 types (connectance 18.0%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
101
Connectance
0.180
Patrimoniales
2
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°

11,8°C

Annual rain

828mm

Moisture idx (CMI)

-0,15

Runoff

443mm/an

PET

972mm

AET

678mm

Mean slope

4,5°

Water table

219cm

Forest

12%

Crops

15%

Urban

0%

Protected

84%

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