Ontologia

HydroBASINS lev08 watershed · #2080021360

Bassin de l'Élorn

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 : Côtes-d'Armor, Finistère

Coastal basinPfafstetter: 23230531

Sub-basin area

3 063,8km²

Upstream area

3 063,8km²

Discharge

4,72m³/s

Mean elev.

81m

Administrative coverage

2 dept-equivalent regions (GADM L2)

159 communes (GADM L5)

30 intersecting protected areas

  • Armorique

    IUCN V

    Regional Nature Park

    416.08 km² overlap

  • Abers - Côte des légendes

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    47.38 km² overlap

  • Abers - côtes des Légendes

    IUCN Not Reported

    Marine Protected Area (OSPAR)

    47.36 km² overlap

  • Ouessant-Molène

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    40.48 km² overlap

  • Ouessant-Molène

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    39.84 km² overlap

  • Iroise

    IUCN Not Reported

    Marine Protected Area (OSPAR)

    37.73 km² overlap

  • Baie de Morlaix

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    37.52 km² overlap

  • Baie de Morlaix

    IUCN Not Reported

    Marine Protected Area (OSPAR)

    37.24 km² overlap

  • Baie de Morlaix

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    37.06 km² overlap

21 more protected areas

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

Species present

9 003 distinct species · 690 043 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

690 043 obs · 84 cellules
Obs. / cellule
≥ 48 029
15 294–48 028
9 412–15 293
7 102–9 411
< 7 102

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'Élorn : 22 espèces reliées par 88 interactions GloBI sur 5 types (connectance 16.7%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
88
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°

10,9°C

Annual rain

1 057mm

Moisture idx (CMI)

0,37

Runoff

872mm/an

PET

668mm

AET

557mm

Mean slope

2,4°

Water table

168cm

Forest

6%

Crops

67%

Urban

7%

Protected

15%

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