San Bernard
IUCN IVNational Wildlife Refuge
257 km²
County · USA
Fort Bend
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
4 425
Observations
1 544 351
Area
2 296,1km²
Ecological tissue
Sample of 41 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 Fort Bend : 31 espèces reliées par 81 interactions GloBI sur 4 types (connectance 9.9%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
41
Interactions affichées
81
Connectance
0.099
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
4 425 distinct species · 1 544 351 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
20,8°C
Annual rain
1 279mm
Warmest m°
33,6°C
Coldest m°
8,1°C
Elevation: 26 m on average (min 13 m, max 48 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
20,8°C
Annual rain
1 279mm
Warmest month
33,6°C
Coldest month
8,1°C
Mean alt.
26m
Min
13m
Max
48m
Std. dev.
7m
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
6,3
Org. C
25,3g/kg
Clay
37,6%
Sand
21,4%
Silt
41,0%
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
6,3
Org. C
48,4g/kg
Clay
36,6%
Sand
21,8%
Silt
41,6%
5–15 cm
pH H₂O
6,3
Org. C
15,9g/kg
Clay
37,0%
Sand
21,7%
Silt
41,3%
15–30 cm
pH H₂O
6,4
Org. C
11,5g/kg
Clay
39,2%
Sand
20,6%
Silt
40,2%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest25.3%
Crops21.3%
Built-up3.1%
Bare soil1.2%
Other (grassland, water…)49.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology8 basins · 12 lakes · 28 rivers
Hydrology metrics for this exact territory
Stream length here
507,4km
Lake surface here
13,90km²
Basins crossed
8
Max stream order
6
Max drainage
108 480km²
Discharge in basins
262,8m³/s
Mean precip.
1 124mm/an
Mean T°
20,2°C
Moisture idx
-0,22
Mean runoff
380mm/an
Mean elev. (basins)
33m
Watersheds crossing here
- Bassin de Brazos Riversub-area1 447,7 km²overlap898.60 km²39%
- Bassin de Big Creeksub-area480 km²overlap479.41 km²21%
- Bassin de San Bernard Riversub-area2 584,8 km²overlap450.25 km²20%
- Bassin de Buffalo Bayousub-area2 693,4 km²overlap218.03 km²9%
- Bassin de Brazos Riversub-area206,5 km²overlap101.42 km²4%
- Bassin de Oyster Creeksub-area253,8 km²overlap70.79 km²3%
- Bassin de Clear Creeksub-area728,6 km²overlap43.65 km²2%
- Bassin de Chocolate Bayousub-area2 549,7 km²overlap33.91 km²1%
Lakes (12, top by area)
- Lake Georgearea8,9 km²avg depth2.6 m
- Lac 1067050area0,9 km²avg depth3.2 m
- Lac 1067124area0,8 km²avg depth1.4 m
- Lac 1066712area0,7 km²avg depth2.2 m
- Lac 1067150area0,5 km²avg depth1.3 m
- Lac 1067137area0,5 km²avg depth1.9 m
- Lac 1066807area0,4 km²avg depth1.4 m
- Lac 1067153area0,4 km²avg depth1.9 m
- Lac 1066827area0,3 km²avg depth1.8 m
Rivers / streams (28, ord ≥ 4)
- Brazos Riverord 6len here117.83 km6%total1942 km
- Oyster Creekord 2len here84.15 km62%total136 km
- Big Creekord 6len here61.33 km32%total190 km
- Snake Creekord 4len here37.69 km89%total42 km
- Buffalo Bayouord 4len here18.71 km14%total137 km
- San Bernard Riverord 4len here17.48 km9%total189 km
- Sandy Branchord 4len here16.93 km54%total31 km
- Seabourne Creekord 2len here14.92 km100%total15 km
- Little Prong Creekord 3len here13.06 km100%total13 km
- Boone Branchord 3len here11.40 km42%total27 km
- Canal Jord 6len here10.74 km82%total13 km
- Cottonwood Creekord 3len here9.55 km5%total174 km
16 more river segmentssorted by Strahler order + length
- Dry Creekord 2len here9.51 km26%total37 km
- Cow Creekord 2len here9.25 km56%total17 km
- Bessies Creekord 6len here8.70 km20%total44 km
- Keegans Bayouord 1len here8.01 km49%total16 km
- Buffalo Bayou Willow Branchord 2len here7.99 km36%total22 km
- Cedar Creekord 2len here7.62 km100%total8 km
- Clear Creekord 4len here6.85 km10%total70 km
- Mound Creekord 2len here5.79 km21%total28 km
- Buffalo Creekord 1len here5.56 km100%total6 km
- Deer Creekord 6len here5.37 km11%total51 km
- Buffalo Bayou Cane Island Branchord 2len here4.80 km37%total13 km
- Turkey Creekord 3len here4.68 km7%total65 km
- Turkey Sloughord 4len here4.07 km46%total9 km
- Bee Creekord 3len here3.07 km36%total9 km
- Sims Bayouord 2len here2.34 km6%total39 km
- Snake Creekord 1len here0.01 km0%total3 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
3hab/km²
Night light
11,0nW
Built-up
306,6%
Pesticides
14,2kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas6
IUCN IV · 2IUCN V · 2IUCN Not Assigned · 2🌊 Marine · 2
San Bernard National Wildlife Refuge
IUCN IVMarine Protected Area · 1968
251 km²
Seabourne Creek
IUCN VNature Park
1 km²
Us-Tx-73-1
IUCN Not AssignedConservation Easement · 2002
0 km²
Us-Tx-142-4
IUCN Not AssignedConservation Easement · 2010
0 km²
Gannoway Lake
IUCN VLake
0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN