Ontologia

HydroBASINS lev08 watershed · #2080020830

Bassin du Lay

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 : Vendée

Pfafstetter: 23219060

Sub-basin area

1 998,9km²

Upstream area

1 998,9km²

Discharge

34,34m³/s

Mean elev.

72m

Administrative coverage

1 dept-equivalent regions (GADM L2)

114 communes (GADM L5)

10 intersecting protected areas

1 more protected areas

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

Species present

6 025 distinct species · 323 626 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

323 626 obs · 60 cellules
Obs. / cellule
≥ 23 044
12 779–23 043
6 087–12 778
3 516–6 086
< 3 516

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

Ecological tissue

Sample of 39 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 Lay : 30 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 76 interactions GloBI sur 5 types (connectance 9.3%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
76
Connectance
0.093
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°

11,9°C

Annual rain

778mm

Moisture idx (CMI)

-0,05

Runoff

527mm/an

PET

816mm

AET

578mm

Mean slope

1,5°

Water table

104cm

Forest

0%

Crops

58%

Urban

2%

Protected

0%

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