Ontologia

HydroBASINS lev08 watershed · #2080464550

Bassin de la Seine

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 : Essonne, Seine-et-Marne

Pfafstetter: 23240630

Sub-basin area

1 199,6km²

Upstream area

26 496,1km²

Discharge

192,89m³/s

Mean elev.

98m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de l'Yerres2201 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

130 communes (GADM L5)

30 intersecting protected areas

21 more protected areas

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

Species present

10 804 distinct species · 1 193 788 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 193 788 obs · 37 cellules
Obs. / cellule
≥ 229 257
56 218–229 256
36 738–56 217
19 895–36 737
< 19 895

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

Ecological tissue

Sample of 35 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 Seine : 26 espèces reliées par 141 interactions GloBI sur 6 types (connectance 23.7%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
141
Connectance
0.237
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

645mm

Moisture idx (CMI)

-0,23

Runoff

199mm/an

PET

840mm

AET

543mm

Mean slope

1,3°

Water table

149cm

Forest

26%

Crops

41%

Urban

14%

Protected

27%

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