Ontologia

HydroBASINS lev08 watershed · #2080021700

Bassin du Frémur

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, Ille-et-Vilaine

Coastal basin 31% lakePfafstetter: 23230537

Sub-basin area

201,7km²

Upstream area

201,7km²

Discharge

1,58m³/s

Mean elev.

45m

Administrative coverage

2 dept-equivalent regions (GADM L2)

21 communes (GADM L5)

17 intersecting protected areas

8 more protected areas

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

Species present

3 524 distinct species · 54 340 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

54 340 obs · 5 cellules
Obs. / cellule
≥ 20 197
20 197–20 196
19 850–20 196
5 021–19 849
< 5 021

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 du Frémur : 24 espèces reliées par 128 interactions GloBI sur 5 types (connectance 20.3%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
128
Connectance
0.203
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

737mm

Moisture idx (CMI)

0,04

Runoff

504mm/an

PET

710mm

AET

532mm

Mean slope

1,6°

Water table

144cm

Forest

9%

Crops

70%

Urban

6%

Protected

1%

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