Ouachita
IUCN IVNational Wildlife Refuge · 1935
586 km²
County · USA
Yell
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
2 231
Observations
107 098
Area
2 463km²
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 Yell : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 78 interactions GloBI sur 3 types (connectance 11.1%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
38
Interactions affichées
78
Connectance
0.111
Patrimoniales
1
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
2 231 distinct species · 107 098 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
16,2°C
Annual rain
1 315mm
Warmest m°
32,9°C
Coldest m°
0,5°C
Elevation: 189 m on average (min 88 m, max 640 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
16,2°C
Annual rain
1 315mm
Warmest month
32,9°C
Coldest month
0,5°C
Mean alt.
189m
Min
88m
Max
640m
Std. dev.
86m
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
5,4
Org. C
20,2g/kg
Clay
19,8%
Sand
29,9%
Silt
50,3%
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
5,4
Org. C
34,3g/kg
Clay
16,9%
Sand
31,5%
Silt
51,7%
5–15 cm
pH H₂O
5,4
Org. C
17,5g/kg
Clay
17,7%
Sand
31,0%
Silt
51,3%
15–30 cm
pH H₂O
5,4
Org. C
8,8g/kg
Clay
24,8%
Sand
27,3%
Silt
47,9%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest76.8%
Crops6.1%
Built-up0.2%
Bare soil0.1%
Other (grassland, water…)16.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology18 basins · 13 lakes · 9 rivers
Hydrology metrics for this exact territory
Stream length here
363,4km
Lake surface here
30,45km²
Basins crossed
18
Max stream order
7
Max drainage
394 361km²
Discharge in basins
738,8m³/s
Mean precip.
1 251mm/an
Mean T°
15,4°C
Moisture idx
-0,07
Max snow
2%
Mean runoff
377mm/an
Mean elev. (basins)
208m
Watersheds crossing here
- Bassin de Fourche LaFave Riversub-area632,2 km²overlap515.08 km²21%
- Bassin de Petit Jean Riversub-area453 km²overlap337.95 km²14%
- Bassin de Petit Jean Riversub-area254,5 km²overlap238.79 km²10%
- Bassin de Arkansas Riversub-area499,5 km²overlap206.71 km²8%
- Basin #58990sub-area370,4 km²overlap202.30 km²8%
- Bassin de South Fourche LaFave Riversub-area607,4 km²overlap177.02 km²7%
- Bassin de Little Chickalah Creeksub-area197 km²overlap172.87 km²7%
- Bassin de Petit Jean Riversub-area165,7 km²overlap165.63 km²7%
- Bassin de Irons Forksub-area441,9 km²overlap150.78 km²6%
9 more basinssorted by overlap
- Bassin de Fourche LaFave Riversub-area114,9 km²overlap114.91 km²5%
- Bassin de Fourche LaFave Riversub-area269,5 km²overlap86.92 km²4%
- Bassin de Petit Jean Riversub-area93,7 km²overlap35.47 km²1%
- Bassin de Ouachita Riversub-area1 532,6 km²overlap27.75 km²1%
- Bassin de Arkansas Riversub-area148,2 km²overlap18.20 km²1%
- Bassin de Rose Creeksub-area143,4 km²overlap9.57 km²0%
- Bassin de Fourche LaFave Riversub-area113,2 km²overlap2.76 km²0%
- Basin #57800sub-area240 km²overlap0.39 km²0%
- Bassin de Arkansas Riversub-area168,7 km²overlap0.07 km²0%
Lakes (13, top by area)
- Dardanelle Lakearea94,3 km²avg depth6.4 m
- Blue Mountain Lakearea11,3 km²avg depth28.2 m
- Nimrod Lakearea9,6 km²avg depth43.0 m
- Holla Bendarea1,4 km²avg depth2.5 m
- Lake Dardanellearea1,1 km²avg depth6.1 m
- Lac 1060742area0,6 km²avg depth4.5 m
- Lac 1060955area0,3 km²avg depth2.7 m
- Lac 1060841area0,3 km²avg depth4.0 m
- Lac 1060734area0,3 km²avg depth1.2 m
Rivers / streams (9, ord ≥ 4)
- Petit Jean Riverord 4len here158.89 km55%total288 km
- Fourche LaFave Riverord 4len here101.60 km32%total313 km
- Arkansas Riverord 9len here33.59 km1%total3511 km
- Irons Forkord 3len here28.86 km36%total80 km
- South Fourche LaFave Riverord 3len here21.59 km29%total74 km
- Little Chickalah Creekord 1len here6.25 km100%total6 km
- Graham Creekord 3len here5.76 km6%total99 km
- Rose Creekord 3len here3.70 km4%total84 km
- Hayes Creekord 1len here3.14 km13%total24 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,3nW
Built-up
23,5%
Pesticides
8,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas9
IUCN V · 5IUCN IV · 2IUCN Ib · 1IUCN Not Assigned · 1
Petit Jean
IUCN VState Wildlife Management Area
61 km²
Dry Creek
IUCN IbWilderness · 1984
26 km²
Holla Bend
IUCN IVNational Wildlife Refuge
25 km²
Galla Creek
IUCN VState Wildlife Management Area
13 km²
Wetlands Reserve Program (WRP), Yell, AR
IUCN VReserve Program · 1996
9 km²
Complete list9 protected areas
- OuachitaNational Wildlife RefugeIUCN IV1935586 km²
- Petit JeanState Wildlife Management AreaIUCN V61 km²
- Dry CreekWildernessIUCN Ib198426 km²
- Holla BendNational Wildlife RefugeIUCN IV25 km²
- Galla CreekState Wildlife Management AreaIUCN V13 km²
- Wetlands Reserve Program (WRP), Yell, ARReserve ProgramIUCN V19969 km²
- Emergency Watershed Protection Program - Floodplain Easement (EWPP-FPE), Yell, ARWatershed ProtectionIUCN V20102 km²
- Us-Ar-76-2Conservation EasementIUCN Not Assigned20071 km²
- Dardanelle RockNatural AreaIUCN V0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN