Ontologia

County · USA

Stephens

United States

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

Species observed

1 687

Observations

26 897

Area

478,5km²

Ecological tissue

Sample of 43 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 Stephens : 31 espèces reliées par 78 interactions GloBI sur 4 types (connectance 8.2%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
44
Interactions affichées
78
Connectance
0.083
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

1 687 distinct species · 26 897 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

26 897 obs · 15 cellules
Obs. / cellule
≥ 8 375
3 697–8 374
1 863–3 696
1 168–1 862
< 1 168

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

Climate

Mean T°

15,9°C

Annual rain

1 434mm

Warmest m°

31,2°C

Coldest m°

1,3°C

Elevation: 278 m on average (min 206 m, max 450 m)

Bioclimatic detailsExpert
Annual mean temp.
15,9°C
Annual rain
1 434mm
Warmest month
31,2°C
Coldest month
1,3°C
Mean alt.
278m
Min
206m
Max
450m
Std. dev.
51m
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

30,7g/kg

Clay

24,5%

Sand

45,0%

Silt

30,5%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,2
Org. C
55,2g/kg
Clay
21,9%
Sand
46,8%
Silt
31,3%
5–15 cm
pH H₂O
5,2
Org. C
24,9g/kg
Clay
24,0%
Sand
45,5%
Silt
30,5%
15–30 cm
pH H₂O
5,2
Org. C
11,9g/kg
Clay
27,5%
Sand
42,8%
Silt
29,8%

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

Land cover

Forest69.4%
Crops3.6%
Built-up1.0%
Bare soil0.3%
Other (grassland, water…)25.7%

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

Hydrology3 basins · 7 lakes · 24 rivers

Hydrology metrics for this exact territory

Stream length here

149,4km

Lake surface here

10,36km²

Basins crossed

3

Max stream order

4

Max drainage

2 514km²

Discharge in basins

10,6m³/s

Mean precip.

1 533mm/an

Mean T°

14,5°C

Moisture idx

0,15

Max snow

1%

Mean runoff

701mm/an

Mean elev. (basins)

414m

Watersheds crossing here

Lakes (7, top by area)

Rivers / streams (24, ord ≥ 4)

12 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

1,6nW

Built-up

100,2%

Pesticides

7,5kg/km²

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

Protected areas2

IUCN V · 2

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