Ontologia

County · USA

Mercer

United States

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

Species observed

1 480

Observations

22 569

Area

1 478,4km²

Ecological tissue

Sample of 38 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 Mercer : 30 espèces reliées par 74 interactions GloBI sur 3 types (connectance 10.5%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
74
Connectance
0.105
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

1 480 distinct species · 22 569 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

22 569 obs · 42 cellules
Obs. / cellule
≥ 3 274
1 709–3 273
424–1 708
210–423
< 210

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

Climate

Mean T°

10,5°C

Annual rain

979mm

Warmest m°

29,0°C

Coldest m°

-8,5°C

Elevation: 207 m on average (min 161 m, max 246 m)

Bioclimatic detailsExpert
Annual mean temp.
10,5°C
Annual rain
979mm
Warmest month
29,0°C
Coldest month
-8,5°C
Mean alt.
207m
Min
161m
Max
246m
Std. dev.
23m
Köppen-Geiger (dominant)
DfaCold, no dry season, hot summer(100 %)Cold

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

Soil & lithology

pH H₂O

6,2

Org. C

22,1g/kg

Clay

30,2%

Sand

5,7%

Silt

64,0%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,3
Org. C
32,4g/kg
Clay
29,4%
Sand
5,9%
Silt
64,7%
5–15 cm
pH H₂O
6,2
Org. C
21,1g/kg
Clay
29,8%
Sand
5,8%
Silt
64,4%
15–30 cm
pH H₂O
6,1
Org. C
12,9g/kg
Clay
31,4%
Sand
5,6%
Silt
63,0%

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

Land cover

Forest17.5%
Crops66.2%
Built-up0.3%
Bare soil0.6%
Other (grassland, water…)15.4%

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

Hydrology6 basins · 5 lakes · 25 rivers

Hydrology metrics for this exact territory

Stream length here

321,7km

Lake surface here

3,81km²

Basins crossed

6

Max stream order

7

Max drainage

293 221km²

Discharge in basins

3 144,7m³/s

Mean precip.

910mm/an

Mean T°

10,0°C

Moisture idx

-0,12

Max snow

12%

Mean runoff

267mm/an

Mean elev. (basins)

213m

Watersheds crossing here

Lakes (5, top by area)

Rivers / streams (25, ord ≥ 4)

13 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

0,3nW

Built-up

27,9%

Pesticides

8,3kg/km²

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

Protected areas5

IUCN V · 4IUCN IV · 1

Port Louisa

IUCN IV

National Wildlife Refuge · 2000

0 km²

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