Ontologia

HydroBASINS lev08 watershed · #2080021350

Bassin de l'Aulne

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 3 administrative regions : Côtes-d'Armor, Finistère, Morbihan

2% lakePfafstetter: 23230520

Sub-basin area

1 789,2km²

Upstream area

1 789,5km²

Discharge

64,46m³/s

Mean elev.

158m

Administrative coverage

3 dept-equivalent regions (GADM L2)

82 communes (GADM L5)

27 intersecting protected areas

18 more protected areas

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

Species present

4 331 distinct species · 210 401 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

210 401 obs · 51 cellules
Obs. / cellule
≥ 24 477
9 116–24 476
4 309–9 115
2 376–4 308
< 2 376

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

Ecological tissue

Sample of 33 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'Aulne : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 5 types (connectance 16.0%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
95
Connectance
0.160
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°

10,7°C

Annual rain

1 024mm

Moisture idx (CMI)

0,34

Runoff

932mm/an

PET

671mm

AET

553mm

Mean slope

3,7°

Water table

219cm

Forest

2%

Crops

39%

Urban

1%

Protected

36%

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