Ontologia

HydroBASINS lev08 watershed · #2080491520

Bassin de l'Oudon

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 4 administrative regions : Ille-et-Vilaine, Loire-Atlantique, Maine-et-Loire, Mayenne

Pfafstetter: 23222022

Sub-basin area

1 489km²

Upstream area

1 489km²

Discharge

14,52m³/s

Mean elev.

72m

Administrative coverage

Hydrographic chain

Drains into

Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

108 communes (GADM L5)

4 intersecting protected areas

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

Species present

4 048 distinct species · 298 404 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

298 404 obs · 64 cellules
Obs. / cellule
≥ 37 422
10 958–37 421
5 075–10 957
3 451–5 074
< 3 451

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

Ecological tissue

Sample of 36 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'Oudon : 24 espèces reliées par 124 interactions GloBI sur 6 types (connectance 16.7%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
124
Connectance
0.167
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

709mm

Moisture idx (CMI)

-0,15

Runoff

327mm/an

PET

834mm

AET

568mm

Mean slope

1,4°

Water table

119cm

Forest

1%

Crops

63%

Urban

1%

Protected

0%

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