Ontologia

County · USA

Placer

United States

CsaTemperate, dry summer, hot summer(49 %)

Species observed

6 876

Observations

1 064 181

Area

3 886,4km²

Ecological tissue

Sample of 29 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 Placer : 21 espèces reliées par 66 interactions GloBI sur 4 types (connectance 16.3%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
66
Connectance
0.163
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

6 876 distinct species · 1 064 181 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 064 181 obs · 103 cellules
Obs. / cellule
≥ 74 687
27 050–74 686
8 849–27 049
2 451–8 848
< 2 451

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

Climate

Mean T°

11,6°C

Annual rain

1 278mm

Warmest m°

29,6°C

Coldest m°

-0,7°C

Elevation: 1 155 m on average (min 9 m, max 2 562 m)

Bioclimatic detailsExpert
Annual mean temp.
11,6°C
Annual rain
1 278mm
Warmest month
29,6°C
Coldest month
-0,7°C
Mean alt.
1 155m
Min
9m
Max
2 562m
Std. dev.
794m
Köppen-Geiger (dominant)
CsaTemperate, dry summer, hot summer(49 %)Temperate

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

Soil & lithology

pH H₂O

5,9

Org. C

50,3g/kg

Clay

18,1%

Sand

47,1%

Silt

34,8%

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

Dominant lithology: vbGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,9
Org. C
74,6g/kg
Clay
17,2%
Sand
47,4%
Silt
35,5%
5–15 cm
pH H₂O
5,9
Org. C
49,3g/kg
Clay
17,6%
Sand
47,5%
Silt
34,9%
15–30 cm
pH H₂O
5,9
Org. C
27,0g/kg
Clay
19,5%
Sand
46,5%
Silt
34,0%

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

Land cover

Forest47.0%
Crops6.3%
Built-up1.3%
Bare soil2.8%
Other (grassland, water…)42.7%

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

Hydrology14 basins · 19 lakes · 79 rivers

Hydrology metrics for this exact territory

Stream length here

983,5km

Lake surface here

230,99km²

Basins crossed

14

Max stream order

5

Max drainage

5 323km²

Discharge in basins

126,3m³/s

Mean precip.

1 050mm/an

Mean T°

11,1°C

Moisture idx

-0,10

Max snow

40%

Mean runoff

520mm/an

Mean elev. (basins)

1 143m

Watersheds crossing here

5 more basins

Lakes (19, top by area)

10 more lakes

Rivers / streams (79, ord ≥ 4)

67 more river segments

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

Human pressure

Pop. density

1hab/km²

Night light

2,0nW

Built-up

125,2%

Pesticides

7,5kg/km²

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

Protected areas42

IUCN V · 23IUCN Not Assigned · 16IUCN Ia · 2IUCN Ib · 1
Complete list

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