Ontologia

County · USA

Powhatan

United States

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

Species observed

3 075

Observations

161 250

Area

676,4km²

Ecological tissue

Sample of 37 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 Powhatan : 26 espèces reliées par 85 interactions GloBI sur 4 types (connectance 12.1%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
85
Connectance
0.121
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

3 075 distinct species · 161 250 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

161 250 obs · 19 cellules
Obs. / cellule
≥ 56 258
15 029–56 257
8 770–15 028
6 525–8 769
< 6 525

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

1 134mm

Warmest m°

31,4°C

Coldest m°

-0,7°C

Elevation: 88 m on average (min 44 m, max 124 m)

Bioclimatic detailsExpert
Annual mean temp.
14,8°C
Annual rain
1 134mm
Warmest month
31,4°C
Coldest month
-0,7°C
Mean alt.
88m
Min
44m
Max
124m
Std. dev.
15m
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

25,7g/kg

Clay

23,3%

Sand

42,3%

Silt

34,4%

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
53,9g/kg
Clay
20,6%
Sand
44,0%
Silt
35,4%
5–15 cm
pH H₂O
5,3
Org. C
16,7g/kg
Clay
20,9%
Sand
44,0%
Silt
35,1%
15–30 cm
pH H₂O
5,3
Org. C
6,6g/kg
Clay
28,4%
Sand
38,9%
Silt
32,7%

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

Land cover

Forest72.0%
Crops4.5%
Built-up0.6%
Bare soil0.2%
Other (grassland, water…)22.7%

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

Hydrology7 basins · 7 lakes · 10 rivers

Hydrology metrics for this exact territory

Stream length here

125,2km

Lake surface here

1,12km²

Basins crossed

7

Max stream order

5

Max drainage

18 244km²

Discharge in basins

245,8m³/s

Mean precip.

1 084mm/an

Mean T°

13,6°C

Moisture idx

-0,11

Max snow

2%

Mean runoff

412mm/an

Mean elev. (basins)

87m

Watersheds crossing here

Lakes (7, top by area)

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

Human pressure

Pop. density

0hab/km²

Night light

0,9nW

Built-up

60,4%

Pesticides

10,6kg/km²

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

Protected areas3

IUCN III · 1IUCN Not Assigned · 1IUCN V · 1

Goo-03997

IUCN Not Assigned

Conservation Easement · 2015

4 km²

Powhatan

IUCN V

State Wildlife Management Area

0 km²

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