Ontologia

HydroBASINS lev08 watershed · #2080501710

Bassin de la Boulogne

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 : Loire-Atlantique, Vendée

17% lakePfafstetter: 23221002

Sub-basin area

1 269km²

Upstream area

1 269,1km²

Discharge

21,77m³/s

Mean elev.

33m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Étier du Port156 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

69 communes (GADM L5)

15 intersecting protected areas

  • Lac de Grand-Lieu

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    63.10 km² overlap

  • Lac de Grand-Lieu

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

    62.35 km² overlap

  • Lac de Grand Lieu

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    57.48 km² overlap

  • Estuaire de la Loire

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    37.52 km² overlap

  • Estuaire de la Loire

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    37.47 km² overlap

  • Lac de grand lieu

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    27.83 km² overlap

  • Lac De Grand-Lieu

    IUCN IV

    National Nature Reserve

    26.76 km² overlap

  • Lac De Grand-Lieu

    IUCN IV

    Regional Nature Reserve

    6.57 km² overlap

  • Estuaire de la loire

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    2.55 km² overlap

6 more protected areas

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

Species present

4 253 distinct species · 294 861 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

294 861 obs · 34 cellules
Obs. / cellule
≥ 133 806
9 637–133 805
5 421–9 636
3 480–5 420
< 3 480

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

Ecological tissue

Sample of 45 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 Boulogne : 40 espèces + 5 bulles famille, 77 interactions GloBI documentées sur 4 types (connectance 7.8%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
45
Interactions affichées
77
Connectance
0.078
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°

11,7°C

Annual rain

797mm

Moisture idx (CMI)

-0,02

Runoff

531mm/an

PET

814mm

AET

581mm

Mean slope

0,8°

Water table

66cm

Forest

4%

Crops

53%

Urban

3%

Protected

3%

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