Mcfaddin
IUCN IVNational Wildlife Refuge
266 km²
County · USA
Galveston
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
4 245
Observations
1 286 277
Area
1 056,5km²
Ecological tissue
Sample of 37 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 Galveston : 27 espèces reliées par 67 interactions GloBI sur 3 types (connectance 10.1%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
37
Interactions affichées
67
Connectance
0.101
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
4 245 distinct species · 1 286 277 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
20,9°C
Annual rain
1 351mm
Warmest m°
31,1°C
Coldest m°
9,6°C
Elevation: 3 m on average (min -12 m, max 13 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
20,9°C
Annual rain
1 351mm
Warmest month
31,1°C
Coldest month
9,6°C
Mean alt.
3m
Min
-12m
Max
13m
Std. dev.
3m
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
6,5
Org. C
36,8g/kg
Clay
32,7%
Sand
25,4%
Silt
41,9%
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
6,4
Org. C
53,9g/kg
Clay
32,0%
Sand
25,8%
Silt
42,2%
5–15 cm
pH H₂O
6,4
Org. C
31,6g/kg
Clay
32,2%
Sand
25,7%
Silt
42,2%
15–30 cm
pH H₂O
6,6
Org. C
25,0g/kg
Clay
34,1%
Sand
24,6%
Silt
41,3%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest21.5%
Crops11.1%
Built-up4.4%
Bare soil1.6%
Other (grassland, water…)61.4%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology3 basins · 37 lakes · 20 rivers
Hydrology metrics for this exact territory
Stream length here
134,2km
Lake surface here
36,70km²
Basins crossed
3
Max stream order
4
Max drainage
2 550km²
Discharge in basins
2,1m³/s
Mean precip.
1 232mm/an
Mean T°
20,5°C
Moisture idx
-0,07
Mean runoff
531mm/an
Mean elev. (basins)
8m
Watersheds crossing here
Lakes (37, top by area)
- Moses Lakearea9,5 km²avg depth2.0 m
- Clear Lakearea7,8 km²avg depth5.1 m
- Lake #14264area4,2 km²avg depth0.9 m
- Galveston County Industrial Water Reservoirarea3,3 km²avg depth0.6 m
- Lake #14207area2,9 km²avg depth1.6 m
- Lake #14124area1,9 km²avg depth0.5 m
- Carancahua Lakearea1,6 km²avg depth0.7 m
- Greens Lakearea1,4 km²avg depth0.5 m
- Lake #14127area1,1 km²avg depth0.5 m
28 more lakes
- Lac 1067443area0,9 km²avg depth2.5 m
- Lac 1067375area0,8 km²avg depth1.7 m
- Lac 1066949area0,7 km²avg depth0.9 m
- Lac 1067269area0,7 km²avg depth2.5 m
- Lac 1066921area0,7 km²avg depth2.6 m
- Lac 1067351area0,4 km²avg depth1.5 m
- Lac 1067222area0,4 km²avg depth2.2 m
- Lac 1067470area0,4 km²avg depth1.8 m
- Lac 1066915area0,4 km²avg depth2.5 m
- Lac 1067116area0,4 km²avg depth2.4 m
- Lac 1067296area0,3 km²avg depth1.8 m
- Lac 1067424area0,3 km²avg depth1.0 m
- Lac 1067253area0,3 km²avg depth2.2 m
- Lac 1066916area0,3 km²avg depth1.5 m
- Lac 1067453area0,3 km²avg depth1.4 m
- Lac 1067422area0,3 km²avg depth2.2 m
- Lac 1067283area0,2 km²avg depth1.7 m
- Lac 1067016area0,2 km²avg depth1.0 m
- Lac 1067497area0,2 km²avg depth0.9 m
- Lac 1067394area0,2 km²avg depth1.4 m
- Lac 1067106area0,2 km²avg depth2.5 m
- Lac 1067382area0,2 km²avg depth1.2 m
- Lac 1067315area0,1 km²avg depth1.3 m
- Lac 1066973area0,1 km²avg depth2.0 m
- Lac 1067138area0,1 km²avg depth1.7 m
- Lac 1067420area0,1 km²avg depth1.2 m
- Lac 1067449area0,1 km²avg depth1.5 m
- Lac 1067393area0,1 km²avg depth0.9 m
Rivers / streams (20, ord ≥ 4)
- Dickinson Bayouord 3len here29.75 km99%total30 km
- Clear Creekord 4len here19.90 km29%total70 km
- Basford Bayouord 2len here9.32 km100%total9 km
- Moses Bayouord 2len here9.12 km99%total9 km
- Cloud Bayouord 1len here7.87 km86%total9 km
- Carancahua Bayouord 1len here7.75 km100%total8 km
- Oyster Bayouord 3len here7.71 km77%total10 km
- Highland Bayouord 2len here7.68 km100%total8 km
- Chigger Creekord 2len here6.70 km68%total10 km
- Gum Bayouord 1len here6.68 km100%total7 km
- Briscoe Canalord 1len here4.79 km34%total14 km
- Moses Bayouord 1len here4.26 km100%total4 km
8 more river segmentssorted by Strahler order + length
- HL&P Canalord 3len here3.43 km63%total5 km
- Magnolia Bayouord 1len here3.22 km100%total3 km
- Gulf Intracoastal Waterwayord 3len here3.13 km10%total30 km
- Halls Bayouord 2len here1.59 km12%total13 km
- Armand Bayouord 3len here0.58 km8%total7 km
- Taylor Bayouord 2len here0.38 km3%total14 km
- Cow Bayouord 1len here0.30 km29%total1 km
- Mud Gullyord 2len here≈ tangenttotal8 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
2hab/km²
Night light
12,7nW
Built-up
437,3%
Pesticides
9,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas25
IUCN V · 18IUCN IV · 7🌊 Marine · 17
San Bernard
IUCN IVNational Wildlife Refuge
257 km²
San Bernard National Wildlife Refuge
IUCN IVMarine Protected Area · 1968
251 km²
McFaddin National Wildlife Refuge
IUCN IVMarine Protected Area · 1980
239 km²
Anahuac National Wildlife Refuge
IUCN IVMarine Protected Area · 1963
156 km²
Anahuac
IUCN IVNational Wildlife Refuge
151 km²
Complete list25 protected areas
- McfaddinNational Wildlife RefugeIUCN IV266 km²
- San BernardNational Wildlife RefugeIUCN IV257 km²
- San Bernard National Wildlife RefugeMarine Protected AreaIUCN IV1968251 km²
- McFaddin National Wildlife RefugeMarine Protected AreaIUCN IV1980239 km²
- Anahuac National Wildlife RefugeMarine Protected AreaIUCN IV1963156 km²
- AnahuacNational Wildlife RefugeIUCN IV151 km²
- Scenic Galveston Preserves ComplexPreserveIUCN V11 km²
- Texas City FeePrivate Conservation LandIUCN V199510 km²
- Bolivar Flats ShorebirdSanctuaryIUCN V7 km²
- Galveston Island State ParkMarine Protected AreaIUCN IV19697 km²
- Galveston Bay FeePrivate Conservation LandIUCN V19875 km²
- West Galveston Bay MegasiteEasementIUCN V20004 km²
- Texas CityEasementIUCN V20023 km²
- Bolivar FlatsAudubon Society Preserve or SanctuaryIUCN V2 km²
- Elm Grove FeeGroveIUCN V20002 km²
- Mundy MarshBird SanctuaryIUCN V1 km²
- High IslandEasementIUCN V19961 km²
- North Deer IslandAudubon Society Preserve or SanctuaryIUCN V1 km²
- Little Pelican IslandAudubon Society Preserve or SanctuaryIUCN V0 km²
- McFarlane MarshEnvironmental SystemIUCN V0 km²
- Smith OaksSanctuaryIUCN V0 km²
- Galveston Bay Prairie Complex FeePrivate Conservation LandIUCN V20030 km²
- Eubanks WoodsEnvironmental SystemIUCN V0 km²
- Rollover IslandSanctuaryIUCN V0 km²
- Dos Vacas MuertasSanctuaryIUCN V0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN