Atchafalaya Delta Wildlife Management Area and Game Preserve
IUCN VIMarine Protected Area · 1977
557 km²
Parish · USA
Saint Mary
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
1 158
Observations
64 416
Area
1 816,8km²
Ecological tissue
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).
RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique
Indicateurs du tissu écologique
Tissu écologique de Saint Mary : 25 espèces reliées par 76 interactions GloBI sur 3 types (connectance 11.4%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
37
Interactions affichées
76
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
1 158 distinct species · 64 416 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
20,5°C
Annual rain
1 748mm
Warmest m°
31,3°C
Coldest m°
8,6°C
Elevation: 1 m on average (min -3 m, max 8 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
20,5°C
Annual rain
1 748mm
Warmest month
31,3°C
Coldest month
8,6°C
Mean alt.
1m
Min
-3m
Max
8m
Std. dev.
1m
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
5,7
Org. C
77,0g/kg
Clay
37,1%
Sand
6,8%
Silt
56,1%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,6
Org. C
75,8g/kg
Clay
36,5%
Sand
7,0%
Silt
56,5%
5–15 cm
pH H₂O
5,7
Org. C
66,6g/kg
Clay
36,7%
Sand
6,9%
Silt
56,4%
15–30 cm
pH H₂O
5,7
Org. C
88,5g/kg
Clay
38,1%
Sand
6,6%
Silt
55,4%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest46.7%
Crops11.0%
Built-up0.6%
Bare soil0.4%
Other (grassland, water…)41.3%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology16 basins · 33 lakes · 35 rivers
Hydrology metrics for this exact territory
Stream length here
375,4km
Lake surface here
84,34km²
Basins crossed
16
Max stream order
5
Max drainage
12 051km²
Discharge in basins
816,3m³/s
Mean precip.
1 565mm/an
Mean T°
19,8°C
Moisture idx
0,13
Mean runoff
747mm/an
Mean elev. (basins)
6m
Watersheds crossing here
- Bassin de Gulf Intracoastal Waterwaysub-area900,2 km²overlap534.69 km²29%
- Bassin de Bayou Techesub-area2 204,7 km²overlap332.66 km²18%
- Bassin de Gulf Intracoastal Waterwaysub-area277,4 km²overlap277.02 km²15%
- Bassin de Cross Bayousub-area245,8 km²overlap219.78 km²12%
- Bassin de Atchafalaya Basin Main Channelsub-area332,6 km²overlap113.06 km²6%
- Bassin de Grand Bayousub-area1 885 km²overlap106.84 km²6%
- Bassin de Bayou Schaffersub-area624,2 km²overlap64.17 km²4%
- Bassin de Bayou Penchantsub-area547,3 km²overlap63.96 km²4%
- Basin #47470sub-area37,2 km²overlap29.10 km²2%
7 more basinssorted by overlap
- Bassin de Lower Atchafalaya Riversub-area18,1 km²overlap18.03 km²1%
- Bassin de Chicot Passsub-area499,5 km²overlap14.44 km²1%
- Bassin de Intracoastal Waterway Alternate Routesub-area11,4 km²overlap11.42 km²1%
- Bassin de Bayou Grosse Tetesub-area2 305,3 km²overlap10.32 km²1%
- Bassin de Atchafalaya Basin Main Channelsub-area7,7 km²overlap7.29 km²0%
- Bassin de Atchafalaya Basin Main Channelsub-area1,5 km²overlap1.45 km²0%
- Bassin de Voss Canalsub-area976,9 km²overlap1.03 km²0%
Lakes (33, top by area)
- Bird Island Chutearea62,9 km²avg depth4.0 m
- Lake Palourdearea41,9 km²avg depth4.8 m
- Lake #9558area20,5 km²avg depth1.9 m
- Yellow Bayouarea18,6 km²avg depth1.8 m
- Flat Lakearea9,6 km²avg depth2.3 m
- Lake #13973area1,8 km²avg depth1.9 m
- Mud Lakearea1,4 km²avg depth0.9 m
- Lake Salvearea1,3 km²avg depth0.7 m
- Lake #14116area1,3 km²avg depth0.8 m
24 more lakes
- Lake #14070area1,1 km²avg depth0.6 m
- Lake #14106area1 km²avg depth0.6 m
- Lac 1066785area0,9 km²avg depth1.5 m
- Lac 1066678area0,8 km²avg depth1.5 m
- Lac 1066719area0,7 km²avg depth2.1 m
- Lac 1066938area0,7 km²avg depth2.0 m
- Lac 1066653area0,6 km²avg depth1.8 m
- Lac 1066650area0,6 km²avg depth1.8 m
- Lac 1066702area0,6 km²avg depth1.9 m
- Lac 1066176area0,5 km²avg depth3.1 m
- Lac 1066235area0,5 km²avg depth1.9 m
- Lac 1066318area0,4 km²avg depth2.2 m
- Lac 1066625area0,3 km²avg depth1.0 m
- Lac 1066912area0,3 km²avg depth0.5 m
- Lac 1066603area0,3 km²avg depth0.9 m
- Lac 1066648area0,3 km²avg depth1.4 m
- Lac 1066832area0,3 km²avg depth1.0 m
- Lac 1066732area0,2 km²avg depth2.3 m
- Lac 1066491area0,2 km²avg depth0.7 m
- Lac 1066175area0,2 km²avg depth2.0 m
- Lac 1066310area0,2 km²avg depth1.4 m
- Lac 1066311area0,2 km²avg depth1.8 m
- Lac 1066531area0,2 km²avg depth0.8 m
- Lac 1066126area0,1 km²avg depth1.6 m
Rivers / streams (35, ord ≥ 4)
- Bayou Techeord 4len here92.44 km53%total174 km
- Atchafalaya Basin Main Channelord 5len here24.92 km36%total69 km
- Gulf Intracoastal Waterwayord 3len here23.87 km100%total24 km
- Grand Bayouord 4len here19.34 km43%total45 km
- Gulf Intracoastal Waterwayord 2len here19.24 km100%total19 km
- Wax Lake Outletord 3len here15.87 km100%total16 km
- Little Wax Bayouord 3len here14.80 km100%total15 km
- Bayou Saleord 2len here14.74 km100%total15 km
- Bayou Schafferord 3len here13.65 km70%total20 km
- Wax Lake Outletord 1len here13.40 km100%total13 km
- Gulf Intracoastal Waterwayord 2len here10.81 km100%total11 km
- Leopard Bayouord 1len here10.67 km99%total11 km
23 more river segmentssorted by Strahler order + length
- Intracoastal Waterway Alternate Routeord 5len here9.97 km12%total81 km
- Gulf Intracoastal Waterwayord 2len here9.77 km100%total10 km
- Horseshoe Bayouord 2len here9.58 km100%total10 km
- Cross Bayouord 1len here8.23 km100%total8 km
- Big Wax Bayouord 1len here7.21 km100%total7 km
- Bayou Schafferord 1len here6.94 km84%total8 km
- Chicot Passord 4len here6.18 km20%total30 km
- Bayou Blackord 3len here5.36 km20%total26 km
- Lower Atchafalaya Riverord 5len here5.01 km100%total5 km
- Big Wax Bayouord 1len here4.54 km100%total5 km
- Filly Bayouord 3len here4.45 km100%total4 km
- Bayou Blueord 3len here4.28 km100%total4 km
- Gulf Intracoastal Waterwayord 1len here4.23 km100%total4 km
- Shell Island Passord 1len here3.92 km100%total4 km
- Charenton Drainage and Navigation Canalord 1len here2.74 km100%total3 km
- Bayou Penchantord 3len here2.31 km4%total62 km
- Big Hog Bayouord 1len here2.07 km96%total2 km
- Lone Oak Bayouord 1len here1.82 km100%total2 km
- Little Wax Bayouord 1len here1.01 km100%total1 km
- Avoca Island Cutofford 4len here0.66 km4%total15 km
- Hog Bayouord 1len here0.61 km101%total1 km
- Charenton Drainage and Navigation Canalord 2len here0.52 km65%total1 km
- Bayou Boeuford 4len here0.26 km0%total118 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
1,4nW
Built-up
60,0%
Pesticides
4,0kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas4
IUCN Not Assigned · 2IUCN VI · 1IUCN IV · 1🌊 Marine · 1
Bayou Teche
IUCN IVNational Wildlife Refuge
40 km²
Agricultural Conservation Easement Program - Wetlands Reserve Easement (ACEP-WRE)
IUCN Not AssignedConservation Easement · 2015
25 km²
Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), St. Mary, LA
IUCN Not AssignedConservation Easement · 2015
2 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN