Ontologia

HydroBASINS lev08 watershed · #2080021280

Bassin de l'Aven

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 : Finistère

Pfafstetter: 23230516

Sub-basin area

208,6km²

Upstream area

208,6km²

Discharge

5,74m³/s

Mean elev.

114m

Administrative coverage

1 dept-equivalent regions (GADM L2)

10 communes (GADM L5)

1 intersecting protected areas

  • Kerdruc

    IUCN IV

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

    0.14 km² overlap

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

Species present

1 367 distinct species · 24 704 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

24 704 obs · 5 cellules
Obs. / cellule
≥ 10 592
10 592–10 591
5 471–10 591
4 591–5 470
< 4 591

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'Aven : 21 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 88 interactions GloBI sur 5 types (connectance 16.7%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
88
Connectance
0.167
Patrimoniales
3
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°

11,0°C

Annual rain

1 026mm

Moisture idx (CMI)

0,33

Runoff

863mm/an

PET

683mm

AET

561mm

Mean slope

2,4°

Water table

126cm

Forest

0%

Crops

43%

Urban

2%

Protected

0%

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