Ontologia

County · USA

Delta

United States

DfbCold, no dry season, warm summer(100 %)

Species observed

2 764

Observations

126 821

Area

3 069,4km²

Ecological tissue

Sample of 34 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 Delta : 23 espèces reliées par 81 interactions GloBI sur 4 types (connectance 14.4%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
81
Connectance
0.144
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

2 764 distinct species · 126 821 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

126 821 obs · 80 cellules
Obs. / cellule
≥ 44 630
4 032–44 629
730–4 031
239–729
< 239

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

Climate

Mean T°

5,9°C

Annual rain

818mm

Warmest m°

24,8°C

Coldest m°

-12,9°C

Elevation: 223 m on average (min 152 m, max 318 m)

Bioclimatic detailsExpert
Annual mean temp.
5,9°C
Annual rain
818mm
Warmest month
24,8°C
Coldest month
-12,9°C
Mean alt.
223m
Min
152m
Max
318m
Std. dev.
30m
Köppen-Geiger (dominant)
DfbCold, no dry season, warm summer(100 %)Cold

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

Soil & lithology

pH H₂O

5,4

Org. C

41,8g/kg

Clay

11,9%

Sand

59,7%

Silt

28,3%

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

Dominant lithology: scGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,4
Org. C
68,8g/kg
Clay
11,2%
Sand
59,7%
Silt
29,1%
5–15 cm
pH H₂O
5,4
Org. C
38,0g/kg
Clay
11,7%
Sand
59,7%
Silt
28,6%
15–30 cm
pH H₂O
5,5
Org. C
18,6g/kg
Clay
12,8%
Sand
59,8%
Silt
27,4%

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

Land cover

Forest76.2%
Crops2.6%
Built-up0.2%
Bare soil0.8%
Other (grassland, water…)20.1%

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

Hydrology14 basins · 16 lakes · 60 rivers

Hydrology metrics for this exact territory

Stream length here

672,2km

Lake surface here

30,47km²

Basins crossed

14

Max stream order

4

Max drainage

159 014km²

Discharge in basins

142,9m³/s

Mean precip.

795mm/an

Mean T°

5,1°C

Moisture idx

0,02

Max snow

37%

Mean runoff

267mm/an

Mean elev. (basins)

237m

Watersheds crossing here

5 more basins

Lakes (16, top by area)

7 more lakes

Rivers / streams (60, ord ≥ 4)

48 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

24,1%

Pesticides

11,9kg/km²

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

Protected areas45

IUCN V · 22IUCN Not Assigned · 22IUCN IV · 1
Complete list

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