Ontologia

County · USA

Alameda

United States

CsbTemperate, dry summer, warm summer(91 %)

Species observed

10 753

Observations

4 315 241

Area

1 935,1km²

Ecological tissue

Sample of 33 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 Alameda : 22 espèces reliées par 77 interactions GloBI sur 3 types (connectance 13.7%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
77
Connectance
0.137
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

10 753 distinct species · 4 315 241 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 315 241 obs · 54 cellules
Obs. / cellule
≥ 579 738
213 746–579 737
74 105–213 745
35 886–74 104
< 35 886

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

Climate

Mean T°

14,4°C

Annual rain

506mm

Warmest m°

28,6°C

Coldest m°

4,4°C

Elevation: 254 m on average (min -8 m, max 1 106 m)

Bioclimatic detailsExpert
Annual mean temp.
14,4°C
Annual rain
506mm
Warmest month
28,6°C
Coldest month
4,4°C
Mean alt.
254m
Min
-8m
Max
1 106m
Std. dev.
250m
Köppen-Geiger (dominant)
CsbTemperate, dry summer, warm summer(91 %)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

25,6g/kg

Clay

30,4%

Sand

24,9%

Silt

44,6%

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
42,1g/kg
Clay
28,9%
Sand
25,7%
Silt
45,4%
5–15 cm
pH H₂O
6,7
Org. C
22,2g/kg
Clay
29,7%
Sand
25,3%
Silt
45,0%
15–30 cm
pH H₂O
6,7
Org. C
12,7g/kg
Clay
32,7%
Sand
23,8%
Silt
43,5%

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

Land cover

Forest19.4%
Crops5.2%
Built-up5.8%
Bare soil4.1%
Other (grassland, water…)65.5%

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

Hydrology8 basins · 32 lakes · 52 rivers

Hydrology metrics for this exact territory

Stream length here

431,2km

Lake surface here

77,32km²

Basins crossed

8

Max stream order

4

Max drainage

53 385km²

Discharge in basins

53,4m³/s

Mean precip.

514mm/an

Mean T°

14,6°C

Moisture idx

-0,58

Max snow

1%

Mean runoff

162mm/an

Mean elev. (basins)

333m

Watersheds crossing here

Lakes (32, top by area)

23 more lakes

Rivers / streams (52, ord ≥ 4)

40 more river segments

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

Human pressure

Pop. density

5hab/km²

Night light

10,0nW

Built-up

580,6%

Pesticides

20,3kg/km²

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

Protected areas27

IUCN V · 17IUCN Not Assigned · 8IUCN IV · 2🌊 Marine · 5📍 Point sites · 1
Complete list

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