Savannah National Wildlife Refuge
IUCN IVMarine Protected Area
128 km²
County · USA
Screven
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
1 908
Observations
25 900
Area
1 699,8km²
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 Screven : 23 espèces reliées par 68 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
36
Interactions affichées
68
Connectance
0.108
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
1 908 distinct species · 25 900 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
18,4°C
Annual rain
1 207mm
Warmest m°
33,0°C
Coldest m°
4,4°C
Elevation: 47 m on average (min 10 m, max 91 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
18,4°C
Annual rain
1 207mm
Warmest month
33,0°C
Coldest month
4,4°C
Mean alt.
47m
Min
10m
Max
91m
Std. dev.
17m
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
5,0
Org. C
27,2g/kg
Clay
22,4%
Sand
57,4%
Silt
20,2%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: wbGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
4,9
Org. C
52,4g/kg
Clay
21,8%
Sand
57,6%
Silt
20,6%
5–15 cm
pH H₂O
5,0
Org. C
17,8g/kg
Clay
21,4%
Sand
58,4%
Silt
20,2%
15–30 cm
pH H₂O
5,0
Org. C
11,6g/kg
Clay
24,1%
Sand
56,1%
Silt
19,8%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest62.2%
Crops11.4%
Built-up0.2%
Bare soil0.5%
Other (grassland, water…)25.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology5 basins · 7 lakes · 7 rivers
Hydrology metrics for this exact territory
Stream length here
229,0km
Lake surface here
1,42km²
Basins crossed
5
Max stream order
6
Max drainage
27 174km²
Discharge in basins
230,7m³/s
Mean precip.
1 205mm/an
Mean T°
18,1°C
Moisture idx
-0,16
Max snow
1%
Mean runoff
395mm/an
Mean elev. (basins)
58m
Watersheds crossing here
- Bassin de Ogeechee Riversub-area2 196,7 km²overlap719.07 km²42%
- Bassin de Brier Creeksub-area2 181,3 km²overlap393.71 km²23%
- Bassin de Savannah Riversub-area2 401,1 km²overlap357.70 km²21%
- Bassin de Savannah Riversub-area495,5 km²overlap212.14 km²12%
- Bassin de Savannah Riversub-area611,9 km²overlap17.14 km²1%
Lakes (7, top by area)
Rivers / streams (7, ord ≥ 4)
- Savannah Riverord 6len here88.84 km13%total707 km
- Ogeechee Riverord 5len here70.57 km12%total600 km
- Brier Creekord 6len here47.03 km18%total257 km
- Rocky Creekord 2len here19.50 km33%total59 km
- The Gaulord 6len here2.77 km17%total17 km
- Lower Three Runsord 6len here0.31 km1%total49 km
- Smith Lake Creekord 1len here≈ tangenttotal5 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,2nW
Built-up
16,0%
Pesticides
26,0kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas16
IUCN V · 9IUCN Not Assigned · 5IUCN IV · 2🌊 Marine · 3
Savannah
IUCN IVNational Wildlife Refuge
124 km²
Tuckahoe
IUCN VWildlife Management Area
60 km²
Hamilton Ridge
IUCN VWildlife Management Area
54 km²
Mush Bluff
IUCN VFee Simple
22 km²
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Bulloch, GA
IUCN VConservation Easement
22 km²
Complete list16 protected areas
- Savannah National Wildlife RefugeMarine Protected AreaIUCN IV128 km²
- SavannahNational Wildlife RefugeIUCN IV124 km²
- TuckahoeWildlife Management AreaIUCN V60 km²
- Hamilton RidgeWildlife Management AreaIUCN V54 km²
- Mush BluffFee SimpleIUCN V22 km²
- Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Bulloch, GAConservation EasementIUCN V22 km²
- Farm Service Agency Interest Of GaConservation EasementIUCN Not Assigned14 km²
- 2013097Conservation EasementIUCN Not Assigned201313 km²
- Us-Sc-8-23Conservation EasementIUCN Not Assigned200712 km²
- Oliver BridgeWildlife Management AreaIUCN V8 km²
- Georgia-Alabama Land Trust Easement #902EasementIUCN Not Assigned20165 km²
- HiltoniaWildlife Management AreaIUCN V2 km²
- Wetlands Reserve Program (WRP), Screven, GAReserve ProgramIUCN V20082 km²
- Atlantic Coast Conservancy/Pelican Coast Conservancy Conservation Easement E201361AConservation EasementIUCN Not Assigned20131 km²
- Dixon BayWildlife Management AreaIUCN V1 km²
- TuckahoeWildlife Management AreaIUCN V0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN