Haute Vallée De Chevreuse
IUCN VRegional Nature Park · 1985
659 km²
Commune · FRA
Les Ulis
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
3 848
Observations
145 919
Area
5,6km²
Ecological tissue
Sample of 34 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 Les Ulis : 21 espèces reliées par 120 interactions GloBI sur 6 types (connectance 20.2%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
35
Interactions affichées
120
Connectance
0.202
Patrimoniales
0
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
3 848 distinct species · 145 919 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
10,8°C
Annual rain
712mm
Warmest m°
23,1°C
Coldest m°
0,8°C
Elevation: 143 m on average (min 97 m, max 155 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
10,8°C
Annual rain
712mm
Warmest month
23,1°C
Coldest month
0,8°C
Mean alt.
143m
Min
97m
Max
155m
Std. dev.
16m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(100 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
7,0
Org. C
27,4g/kg
Clay
23,5%
Sand
17,1%
Silt
59,5%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiMaggregated to Essonne
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,8
Org. C
46,8g/kg
Clay
23,2%
Sand
17,4%
Silt
59,4%
5–15 cm
pH H₂O
7,1
Org. C
20,1g/kg
Clay
23,9%
Sand
16,8%
Silt
59,3%
15–30 cm
pH H₂O
7,1
Org. C
15,2g/kg
Clay
23,3%
Sand
17,0%
Silt
59,7%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest10.7%
Crops9.0%
Built-up13.5%
Bare soil0.2%
Other (grassland, water…)66.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 0 lakes · 0 rivers
Hydrology metrics for this exact territory
Basins crossed
1
Max drainage
30 655km²
Discharge in basins
0,5m³/s
Mean precip.
645mm/an
Mean T°
10,7°C
Moisture idx
-0,21
Max snow
5%
Mean runoff
196mm/an
Mean elev. (basins)
117m
Watersheds crossing here
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
23hab/km²
Night light
31,9nW
Built-up
1 346,2%
Pesticides
47,9kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN V · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN
France-specific data (Phase 2)
ZNIEFF, Natura 2000, INPN protected spaces, BNV-D pesticides, Naïades water quality, SAFRAN fine climate, BRGM lithology — Layer FR to load in Phase 2.