Ontologia

HydroBASINS lev08 watershed · #2080481600

Bassin de la Vilaine

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 : Ille-et-Vilaine

Pfafstetter: 23230270

Sub-basin area

25,7km²

Upstream area

2 437,8km²

Discharge

38,7m³/s

Mean elev.

51m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Don2421 km²

▲ Receives from 2 basins

1 dept-equivalent regions (GADM L2)

5 communes (GADM L5)

1 intersecting protected areas

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

Species present

2 652 distinct species · 74 098 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

74 098 obs · 4 cellules
Obs. / cellule
≥ 33 412
33 412–33 411
25 680–33 411
25 680–25 679
< 25 680

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

Ecological tissue

Sample of 47 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 Vilaine : 16 espèces reliées par 231 interactions GloBI sur 5 types (connectance 11.8%, filtre Serrano α=0.2). 47 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
63
Interactions affichées
231
Connectance
0.118
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°

11,2°C

Annual rain

717mm

Moisture idx (CMI)

-0,11

Runoff

486mm/an

PET

806mm

AET

560mm

Mean slope

1,7°

Water table

147cm

Forest

0%

Crops

81%

Urban

4%

Protected

0%

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