San Bernard
IUCN IVNational Wildlife Refuge
257 km²
County · USA
Matagorda
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
2 221
Observations
473 856
Area
2 960km²
Ecological tissue
Sample of 47 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 Matagorda : 39 espèces reliées par 103 interactions GloBI sur 3 types (connectance 9.5%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
47
Interactions affichées
103
Connectance
0.095
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
2 221 distinct species · 473 856 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
21,3°C
Annual rain
1 234mm
Warmest m°
32,3°C
Coldest m°
9,9°C
Elevation: 8 m on average (min -11 m, max 22 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
21,3°C
Annual rain
1 234mm
Warmest month
32,3°C
Coldest month
9,9°C
Mean alt.
8m
Min
-11m
Max
22m
Std. dev.
6m
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
6,6
Org. C
29,9g/kg
Clay
43,5%
Sand
15,5%
Silt
40,9%
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
6,6
Org. C
45,7g/kg
Clay
42,5%
Sand
15,9%
Silt
41,5%
5–15 cm
pH H₂O
6,6
Org. C
22,7g/kg
Clay
43,1%
Sand
15,7%
Silt
41,1%
15–30 cm
pH H₂O
6,7
Org. C
21,3g/kg
Clay
45,0%
Sand
15,0%
Silt
40,1%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest23.9%
Crops29.3%
Built-up0.3%
Bare soil0.7%
Other (grassland, water…)45.8%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology8 basins · 42 lakes · 37 rivers
Hydrology metrics for this exact territory
Stream length here
533,3km
Lake surface here
54,42km²
Basins crossed
8
Max stream order
6
Max drainage
106 730km²
Discharge in basins
80,3m³/s
Mean precip.
1 134mm/an
Mean T°
20,7°C
Moisture idx
-0,19
Mean runoff
423mm/an
Mean elev. (basins)
19m
Watersheds crossing here
- Bassin de Tres Palacios Riversub-area2 561,2 km²overlap1058.84 km²36%
- Bassin de Colorado Riversub-area2 301 km²overlap638.47 km²22%
- Bassin de Caney Creeksub-area861,6 km²overlap547.37 km²18%
- Bassin de Live Oak Bayousub-area436,8 km²overlap436.07 km²15%
- Bassin de Big Boggy Creeksub-area194,7 km²overlap167.86 km²6%
- Bassin de Gulf Intracoastal Waterwaysub-area190,5 km²overlap75.13 km²3%
- Basin #48370sub-area23,2 km²overlap18.21 km²1%
- Bassin de San Bernard Riversub-area2 584,8 km²overlap16.92 km²1%
Lakes (42, top by area)
- Cooling Water Reservoirarea28,3 km²avg depth10.9 m
- Cedar Lakesarea9,9 km²avg depth0.8 m
- Lake Austinarea9,8 km²avg depth1.7 m
- Mad Island Lakearea2,5 km²avg depth0.6 m
- Lac 1067936area0,7 km²avg depth1.5 m
- Lac 1067943area0,6 km²avg depth1.3 m
- Lac 1067748area0,6 km²avg depth1.4 m
- Lac 1067747area0,5 km²avg depth1.5 m
- Lac 1067805area0,5 km²avg depth1.3 m
33 more lakes
- Lac 1067882area0,4 km²avg depth1.3 m
- Lac 1067884area0,4 km²avg depth1.0 m
- Lac 1067807area0,4 km²avg depth1.3 m
- Lac 1067984area0,4 km²avg depth0.5 m
- Lac 1068002area0,3 km²avg depth1.6 m
- Lac 1067760area0,3 km²avg depth1.1 m
- Lac 1067895area0,3 km²avg depth1.5 m
- Lac 1067814area0,3 km²avg depth1.1 m
- Lac 1067666area0,3 km²avg depth2.5 m
- Lac 1067829area0,3 km²avg depth0.5 m
- Lac 1067875area0,3 km²avg depth1.5 m
- Lac 1067844area0,3 km²avg depth1.1 m
- Lac 1067894area0,3 km²avg depth0.6 m
- Lac 1067929area0,2 km²avg depth1.2 m
- Lac 1067847area0,2 km²avg depth0.8 m
- Lac 1067896area0,2 km²avg depth1.8 m
- Lac 1067919area0,2 km²avg depth0.7 m
- Lac 1067923area0,2 km²avg depth1.2 m
- Lac 1067854area0,2 km²avg depth1.4 m
- Lac 1067918area0,2 km²avg depth1.1 m
- Lac 1067900area0,2 km²avg depth1.0 m
- Lac 1067906area0,2 km²avg depth1.2 m
- Lac 1067927area0,2 km²avg depth1.1 m
- Lac 1067890area0,2 km²avg depth1.5 m
- Lac 1067926area0,2 km²avg depth1.1 m
- Lac 1068007area0,2 km²avg depth0.7 m
- Lac 1067839area0,2 km²avg depth1.2 m
- Lac 1067724area0,1 km²avg depth1.1 m
- Lac 1067720area0,1 km²avg depth1.3 m
- Lac 1067916area0,1 km²avg depth0.7 m
- Lac 1067851area0,1 km²avg depth1.0 m
- Lac 1067717area0,1 km²avg depth0.6 m
- Lac 1068137area0,1 km²avg depth0.9 m
Rivers / streams (37, ord ≥ 4)
- Colorado Riverord 6len here88.80 km5%total1874 km
- Tres Palacios Riverord 3len here81.37 km98%total83 km
- Caney Creekord 3len here74.93 km79%total95 km
- Live Oak Bayouord 2len here39.32 km100%total39 km
- Peyton Creekord 2len here30.73 km100%total31 km
- Quinine Sloughord 3len here17.18 km87%total20 km
- Bucks Bayouord 2len here15.84 km100%total16 km
- Linnville Bayouord 2len here14.46 km68%total21 km
- Wilson Creekord 1len here13.29 km100%total13 km
- East Carancahua Creekord 3len here12.88 km30%total43 km
- West Branch Colorado Riverord 2len here12.33 km100%total12 km
- Tres Palacios River=ord 2len here11.96 km29%total41 km
25 more river segmentssorted by Strahler order + length
- Big Boggy Creekord 1len here11.67 km100%total12 km
- Cashs Creekord 1len here9.65 km96%total10 km
- Gulf Intracoastal Waterwayord 3len here9.51 km100%total10 km
- Gulf Intracoastal Waterwayord 1len here8.58 km65%total13 km
- Little Boggy Creekord 1len here7.91 km100%total8 km
- Moccasin Creekord 2len here6.70 km40%total17 km
- Gulf Intracoastal Waterwayord 2len here5.95 km97%total6 km
- Gulf Intracoastal Waterwayord 2len here5.85 km100%total6 km
- West Branch Mad Island Sloughord 1len here5.85 km100%total6 km
- Turtle Creekord 2len here5.28 km100%total5 km
- Mad Island Sloughord 1len here5.08 km100%total5 km
- Buttermilk Sloughord 1len here4.79 km98%total5 km
- Reed Creekord 1len here4.78 km100%total5 km
- Blue Creekord 2len here4.72 km18%total26 km
- Juanita Creekord 1len here4.44 km100%total4 km
- Wildcat Sloughord 2len here3.47 km100%total3 km
- Gulf Intracoastal Waterwayord 1len here3.24 km97%total3 km
- Gulf Intracoastal Waterwayord 1len here2.83 km99%total3 km
- Gulf Intracoastal Waterwayord 3len here2.50 km96%total3 km
- Gulf Intracoastal Waterwayord 6len here2.50 km100%total3 km
- Gulf Intracoastal Waterwayord 1len here2.28 km45%total5 km
- Little Linnville Bayouord 1len here1.31 km42%total3 km
- Little Robbins Sloughord 1len here0.69 km100%total1 km
- Cedar Lake Creekord 1len here0.38 km3%total11 km
- Gulf Intracoastal Waterwayord 2len here0.22 km2%total14 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,9nW
Built-up
27,8%
Pesticides
14,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas17
IUCN V · 8IUCN Not Assigned · 5IUCN IV · 3IUCN VI · 1🌊 Marine · 9
San Bernard National Wildlife Refuge
IUCN IVMarine Protected Area · 1968
251 km²
Wetlands Reserve Program (WRP), Matagorda, TX
IUCN VReserve Program · 2011
32 km²
Mad Island
IUCN VWildlife Management Area · 1989
30 km²
Mad Island Wildlife Management Area
IUCN VIMarine Protected Area · 1989
29 km²
Mad Island Macrosite Fee
IUCN VPrivate Conservation Land · 1989
28 km²
Complete list17 protected areas
- San BernardNational Wildlife RefugeIUCN IV257 km²
- San Bernard National Wildlife RefugeMarine Protected AreaIUCN IV1968251 km²
- Wetlands Reserve Program (WRP), Matagorda, TXReserve ProgramIUCN V201132 km²
- Mad IslandWildlife Management AreaIUCN V198930 km²
- Mad Island Wildlife Management AreaMarine Protected AreaIUCN VI198929 km²
- Mad Island Macrosite FeePrivate Conservation LandIUCN V198928 km²
- Matagorda PeninsulaState Conservation LandIUCN V23 km²
- Big Boggy National Wildlife RefugeMarine Protected AreaIUCN IV198318 km²
- Big BoggyNational Wildlife RefugeIUCN Not Assigned18 km²
- Nannie M. StringfellowWildlife Management AreaIUCN V199915 km²
- Agricultural Conservation Easement Program - Wetlands Reserve Easement (ACEP-WRE)Conservation EasementIUCN Not Assigned20158 km²
- Agricultural Conservation Easement Program - Wetland Reserve Easements (ACEP-WRE), Matagorda, TXConservation EasementIUCN Not Assigned20158 km²
- Us-Tx-132-2Conservation EasementIUCN Not Assigned20062 km²
- Us-Tx-132-4Conservation EasementIUCN Not Assigned20081 km²
- Wetlands Reserve Program (WRP), Matagorda, TXReserve ProgramIUCN V19990 km²
- Sundown IslandAudubon Society Preserve or SanctuaryIUCN V0 km²
- Palacios WetlaWetlandIUCN V0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN