Ontologia

County · USA

Fairfax

United States

CfaTemperate, no dry season, hot summer(100 %)

Species observed

9 276

Observations

4 282 372

Area

1 044,8km²

Ecological tissue

Sample of 39 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 Fairfax : 28 espèces reliées par 79 interactions GloBI sur 4 types (connectance 10.1%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
79
Connectance
0.101
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

9 276 distinct species · 4 282 372 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 282 372 obs · 29 cellules
Obs. / cellule
≥ 1 076 194
254 334–1 076 193
161 767–254 333
111 265–161 766
< 111 265

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

Climate

Mean T°

13,7°C

Annual rain

1 084mm

Warmest m°

30,7°C

Coldest m°

-2,4°C

Elevation: 82 m on average (min -5 m, max 143 m)

Bioclimatic detailsExpert
Annual mean temp.
13,7°C
Annual rain
1 084mm
Warmest month
30,7°C
Coldest month
-2,4°C
Mean alt.
82m
Min
-5m
Max
143m
Std. dev.
33m
Köppen-Geiger (dominant)
CfaTemperate, no dry season, hot summer(100 %)Temperate

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

Soil & lithology

pH H₂O

5,2

Org. C

38,5g/kg

Clay

22,9%

Sand

34,3%

Silt

42,7%

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

Dominant lithology: suGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,1
Org. C
85,4g/kg
Clay
21,8%
Sand
34,8%
Silt
43,4%
5–15 cm
pH H₂O
5,2
Org. C
21,4g/kg
Clay
22,1%
Sand
34,6%
Silt
43,3%
15–30 cm
pH H₂O
5,3
Org. C
8,8g/kg
Clay
24,9%
Sand
33,5%
Silt
41,6%

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

Land cover

Forest43.5%
Crops1.1%
Built-up6.7%
Bare soil0.3%
Other (grassland, water…)48.3%

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

Hydrology3 basins · 10 lakes · 38 rivers

Hydrology metrics for this exact territory

Stream length here

262,5km

Lake surface here

5,29km²

Basins crossed

3

Max stream order

6

Max drainage

30 317km²

Discharge in basins

49,6m³/s

Mean precip.

1 015mm/an

Mean T°

12,6°C

Moisture idx

-0,11

Max snow

3%

Mean runoff

436mm/an

Mean elev. (basins)

99m

Watersheds crossing here

Lakes (10, top by area)

1 more lakes

Rivers / streams (38, ord ≥ 4)

26 more river segments

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

Human pressure

Pop. density

8hab/km²

Night light

15,9nW

Built-up

671,2%

Pesticides

3,7kg/km²

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

Protected areas48

IUCN III · 39IUCN Not Assigned · 5IUCN V · 4🌊 Marine · 3
Complete list

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