Ontologia

County · USA

Contra Costa

United States

CsbTemperate, dry summer, warm summer(68 %)

Species observed

7 609

Observations

3 343 972

Area

1 931,1km²

Ecological tissue

Sample of 32 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 Contra Costa : 20 espèces reliées par 65 interactions GloBI sur 3 types (connectance 13.1%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
65
Connectance
0.131
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

7 609 distinct species · 3 343 972 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

3 343 972 obs · 46 cellules
Obs. / cellule
≥ 679 982
157 708–679 981
71 461–157 707
37 856–71 460
< 37 856

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

Climate

Mean T°

14,8°C

Annual rain

509mm

Warmest m°

29,0°C

Coldest m°

4,4°C

Elevation: 145 m on average (min -9 m, max 885 m)

Bioclimatic detailsExpert
Annual mean temp.
14,8°C
Annual rain
509mm
Warmest month
29,0°C
Coldest month
4,4°C
Mean alt.
145m
Min
-9m
Max
885m
Std. dev.
146m
Köppen-Geiger (dominant)
CsbTemperate, dry summer, warm summer(68 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

6,7

Org. C

33,2g/kg

Clay

31,9%

Sand

23,6%

Silt

44,5%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,6
Org. C
49,5g/kg
Clay
30,9%
Sand
24,0%
Silt
45,1%
5–15 cm
pH H₂O
6,7
Org. C
30,1g/kg
Clay
31,5%
Sand
23,8%
Silt
44,7%
15–30 cm
pH H₂O
6,7
Org. C
19,9g/kg
Clay
33,2%
Sand
23,1%
Silt
43,7%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest18.6%
Crops13.2%
Built-up5.1%
Bare soil3.1%
Other (grassland, water…)60.0%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology8 basins · 25 lakes · 42 rivers

Hydrology metrics for this exact territory

Stream length here

387,0km

Lake surface here

46,58km²

Basins crossed

8

Max stream order

6

Max drainage

124 353km²

Discharge in basins

1 008,3m³/s

Mean precip.

472mm/an

Mean T°

15,0°C

Moisture idx

-0,61

Max snow

1%

Mean runoff

176mm/an

Mean elev. (basins)

160m

Watersheds crossing here

Lakes (25, top by area)

16 more lakes

Rivers / streams (42, ord ≥ 4)

30 more river segments

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

4hab/km²

Night light

7,0nW

Built-up

511,0%

Pesticides

35,5kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)

Protected areas60

IUCN V · 48IUCN Not Assigned · 11IUCN IV · 1🌊 Marine · 3
Complete list

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN