Ontologia

HydroBASINS lev08 watershed · #2080523290

Bassin de Fossé du Bois Billaud

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 2 administrative regions : Charente-Maritime, Vendée

Pfafstetter: 23219043

Sub-basin area

172,5km²

Upstream area

2 455km²

Discharge

42,2m³/s

Mean elev.

5m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de la Sèvre Niortaise370 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

19 communes (GADM L5)

7 intersecting protected areas

  • Marais Poitevin

    IUCN V

    Regional Nature Park

    172.93 km² overlap

  • Marais poitevin

    IUCN III

    Wetland of International Importance (Ramsar Site)

    19.40 km² overlap

  • Marais poitevin

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    15.66 km² overlap

  • Marais Poitevin

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    12.72 km² overlap

  • Marais Poitevin

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    2.94 km² overlap

  • bois de la vieille vaigue

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.14 km² overlap

  • marais de taugon

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.03 km² overlap

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

Species present

1 580 distinct species · 33 196 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

33 196 obs · 6 cellules
Obs. / cellule
≥ 8 131
8 131–8 130
6 677–8 130
6 515–6 676
< 6 515

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

Ecological tissue

Sample of 40 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 Fossé du Bois Billaud : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 114 interactions GloBI sur 6 types (connectance 14.6%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
114
Connectance
0.146
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°

12,5°C

Annual rain

761mm

Moisture idx (CMI)

-0,09

Runoff

523mm/an

PET

840mm

AET

580mm

Mean slope

0,3°

Water table

21cm

Forest

0%

Crops

64%

Urban

0%

Protected

0%

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