Ontologia

HydroBASINS lev08 watershed · #2080022130

Bassin de la Risle

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 : Calvados, Eure, Orne

Pfafstetter: 23230800

Sub-basin area

2 301,8km²

Upstream area

2 301,8km²

Discharge

38,6m³/s

Mean elev.

170m

Administrative coverage

3 dept-equivalent regions (GADM L2)

310 communes (GADM L5)

19 intersecting protected areas

10 more protected areas

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

Species present

6 288 distinct species · 471 489 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

471 489 obs · 97 cellules
Obs. / cellule
≥ 33 004
9 319–33 003
4 687–9 318
3 127–4 686
< 3 127

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

Ecological tissue

Sample of 30 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 la Risle : 13 espèces reliées par 218 interactions GloBI sur 6 types (connectance 11.9%, filtre Serrano α=0.2). 48 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
61
Interactions affichées
218
Connectance
0.119
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°

9,9°C

Annual rain

702mm

Moisture idx (CMI)

-0,10

Runoff

509mm/an

PET

778mm

AET

550mm

Mean slope

1,6°

Water table

92cm

Forest

3%

Crops

51%

Urban

1%

Protected

4%

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