David K. Nelson (Demopolis)
IUCN VWildlife Management Area
32 km²
County · USA
United States
Species observed
1 766
Observations
21 917
Area
1 706,9km²
Sample of 36 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).
Tissu écologique de Greene : 27 espèces reliées par 70 interactions GloBI sur 3 types (connectance 10.5%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
1 766 distinct species · 21 917 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Mean T°
18,1°C
Annual rain
1 417mm
Warmest m°
32,8°C
Coldest m°
3,5°C
Elevation: 53 m on average (min 22 m, max 104 m)
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
pH H₂O
5,5
Org. C
21,7g/kg
Clay
34,1%
Sand
22,6%
Silt
43,3%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiM
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology metrics for this exact territory
Stream length here
481,5km
Lake surface here
8,82km²
Basins crossed
8
Max stream order
6
Max drainage
23 706km²
Discharge in basins
1 138,1m³/s
Mean precip.
1 407mm/an
Mean T°
17,1°C
Moisture idx
-0,00
Mean runoff
579mm/an
Mean elev. (basins)
64m
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Pop. density
0hab/km²
Night light
0,3nW
Built-up
12,6%
Pesticides
7,9kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Wildlife Management Area
32 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN