Crab Orchard
IUCN IVNational Wildlife Refuge
187 km²
County · USA
Williamson
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
2 648
Observations
256 411
Area
1 154,2km²
Ecological tissue
Sample of 35 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 Williamson : 28 espèces reliées par 68 interactions GloBI sur 3 types (connectance 11.4%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
35
Interactions affichées
68
Connectance
0.114
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
2 648 distinct species · 256 411 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
14,3°C
Annual rain
1 197mm
Warmest m°
31,2°C
Coldest m°
-2,4°C
Elevation: 141 m on average (min 114 m, max 206 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
14,3°C
Annual rain
1 197mm
Warmest month
31,2°C
Coldest month
-2,4°C
Mean alt.
141m
Min
114m
Max
206m
Std. dev.
16m
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
5,6
Org. C
17,5g/kg
Clay
23,1%
Sand
5,6%
Silt
71,3%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,7
Org. C
34,7g/kg
Clay
21,1%
Sand
6,1%
Silt
72,8%
5–15 cm
pH H₂O
5,7
Org. C
11,8g/kg
Clay
21,4%
Sand
5,8%
Silt
72,8%
15–30 cm
pH H₂O
5,5
Org. C
6,0g/kg
Clay
26,7%
Sand
4,9%
Silt
68,4%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest51.7%
Crops19.8%
Built-up1.2%
Bare soil0.2%
Other (grassland, water…)27.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology4 basins · 27 lakes · 10 rivers
Hydrology metrics for this exact territory
Stream length here
108,0km
Lake surface here
41,67km²
Basins crossed
4
Max stream order
4
Max drainage
3 026km²
Discharge in basins
15,2m³/s
Mean precip.
1 135mm/an
Mean T°
13,0°C
Moisture idx
-0,04
Max snow
2%
Mean runoff
359mm/an
Mean elev. (basins)
143m
Watersheds crossing here
Lakes (27, top by area)
- Crab Orchard Lakearea27,9 km²avg depth7.3 m
- Lake of Egyptarea7,9 km²avg depth13.0 m
- Little Grassy Lakearea3,2 km²avg depth13.3 m
- Devils Kitchen Lakearea2,1 km²avg depth18.2 m
- Shirley Slougharea1,2 km²avg depth1.8 m
- Lac 1058695area0,8 km²avg depth4.0 m
- Lac 1058728area0,7 km²avg depth2.8 m
- Lac 1058672area0,6 km²avg depth3.6 m
- Lac 1058743area0,4 km²avg depth2.3 m
18 more lakes
- Lac 1058587area0,3 km²avg depth2.7 m
- Lac 1058572area0,3 km²avg depth2.7 m
- Lac 1058552area0,2 km²avg depth2.8 m
- Lac 1058622area0,2 km²avg depth2.3 m
- Lac 1058730area0,2 km²avg depth2.2 m
- Lac 1058578area0,2 km²avg depth2.5 m
- Lac 1058714area0,2 km²avg depth2.1 m
- Lac 1058742area0,2 km²avg depth2.8 m
- Lac 1058753area0,2 km²avg depth2.3 m
- Lac 1058739area0,2 km²avg depth2.5 m
- Lac 1058610area0,2 km²avg depth1.8 m
- Lac 1058770area0,2 km²avg depth4.2 m
- Lac 1058665area0,2 km²avg depth2.1 m
- Lac 1058791area0,2 km²avg depth2.2 m
- Lac 1058719area0,1 km²avg depth2.6 m
- Lac 1058580area0,1 km²avg depth2.0 m
- Lac 1058737area0,1 km²avg depth2.6 m
- Lac 1058740area0,1 km²avg depth2.7 m
Rivers / streams (10, ord ≥ 4)
- South Fork Saline Riverord 4len here37.75 km25%total151 km
- Big Muddy Riverord 5len here19.17 km9%total214 km
- Little Grassy Creekord 2len here15.63 km100%total16 km
- Grassy Creekord 5len here12.52 km8%total162 km
- Limb Branchord 1len here7.17 km100%total7 km
- Pond Creekord 6len here7.15 km3%total281 km
- Mule Creekord 2len here4.71 km5%total100 km
- Crab Orchard Creekord 4len here3.17 km6%total56 km
- West End Creekord 1len here0.69 km101%total1 km
- Sycamore Creekord 2len here0.07 km0%total33 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
2,3nW
Built-up
119,1%
Pesticides
7,9kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas8
IUCN V · 5IUCN IV · 1IUCN Ib · 1IUCN Not Assigned · 1
Cache River
IUCN VState Natural Area
52 km²
Crab Orchard National Wildlif
IUCN IbNational Wildlife Refuge · 1976
18 km²
Sahara Woods State Fish and
IUCN VWildlife Area
16 km²
Giant City
IUCN VState Park
9 km²
Farm Service Agency Interest Of Il
IUCN Not AssignedConservation Easement
3 km²
Complete list8 protected areas
- Crab OrchardNational Wildlife RefugeIUCN IV187 km²
- Cache RiverState Natural AreaIUCN V52 km²
- Crab Orchard National WildlifNational Wildlife RefugeIUCN Ib197618 km²
- Sahara Woods State Fish andWildlife AreaIUCN V16 km²
- Giant CityState ParkIUCN V9 km²
- Farm Service Agency Interest Of IlConservation EasementIUCN Not Assigned3 km²
- Wetlands Reserve Program (WRP), Williamson, ILReserve ProgramIUCN V19991 km²
- Otey-Grisley ForestNature PreserveIUCN V20160 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN