Balcones Canyonlands
IUCN VNational Wildlife Refuge
109 km²
County · USA
Travis
United States
CfaTemperate, no dry season, hot summer(100 %)
Species observed
10 324
Observations
4 662 516
Area
2 673,7km²
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 Travis : 26 espèces reliées par 73 interactions GloBI sur 3 types (connectance 12.3%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
35
Interactions affichées
73
Connectance
0.123
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
10 324 distinct species · 4 662 516 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
19,9°C
Annual rain
886mm
Warmest m°
34,6°C
Coldest m°
6,1°C
Elevation: 221 m on average (min 119 m, max 395 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
19,9°C
Annual rain
886mm
Warmest month
34,6°C
Coldest month
6,1°C
Mean alt.
221m
Min
119m
Max
395m
Std. dev.
61m
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
7,1
Org. C
21,9g/kg
Clay
32,9%
Sand
29,0%
Silt
38,1%
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
7,0
Org. C
37,5g/kg
Clay
32,0%
Sand
29,5%
Silt
38,6%
5–15 cm
pH H₂O
7,1
Org. C
17,2g/kg
Clay
32,9%
Sand
28,9%
Silt
38,2%
15–30 cm
pH H₂O
7,1
Org. C
11,0g/kg
Clay
33,9%
Sand
28,5%
Silt
37,6%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest35.7%
Crops6.2%
Built-up4.5%
Bare soil1.5%
Other (grassland, water…)52.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology11 basins · 9 lakes · 52 rivers
Hydrology metrics for this exact territory
Stream length here
664,3km
Lake surface here
55,30km²
Basins crossed
11
Max stream order
6
Max drainage
100 261km²
Discharge in basins
169,2m³/s
Mean precip.
835mm/an
Mean T°
19,5°C
Moisture idx
-0,43
Mean runoff
188mm/an
Mean elev. (basins)
238m
Watersheds crossing here
- Bassin de Colorado Riversub-area1 545,5 km²overlap1352.16 km²51%
- Bassin de Colorado Riversub-area1 475,8 km²overlap750.95 km²28%
- Bassin de Onion Creeksub-area857 km²overlap305.56 km²11%
- Bassin de Pedernales Riversub-area145,7 km²overlap103.88 km²4%
- Bassin de Walnut Creeksub-area890,8 km²overlap75.90 km²3%
- Bassin de Colorado Riversub-area927,9 km²overlap42.83 km²2%
- Bassin de Plum Creeksub-area1 009,3 km²overlap16.89 km²1%
- Bassin de Brushy Creeksub-area1 308,8 km²overlap14.76 km²1%
- Bassin de Cypress Creeksub-area208,2 km²overlap7.29 km²0%
Lakes (9, top by area)
- Lake Travisarea51,3 km²avg depth77.5 m
- Decker Lakearea4 km²avg depth14.1 m
- Lake Austinarea2,1 km²avg depth42.7 m
- Lac 1065810area0,8 km²avg depth3.7 m
- Lac 1065832area0,6 km²avg depth2.8 m
- Lac 1065830area0,4 km²avg depth2.0 m
- Lac 1065797area0,3 km²avg depth1.9 m
- Lac 1065806area0,3 km²avg depth2.1 m
- Lac 1065863area0,1 km²avg depth2.5 m
Rivers / streams (52, ord ≥ 4)
- Colorado Riverord 6len here111.75 km6%total1874 km
- Barton Creekord 2len here43.58 km72%total61 km
- Dry Creekord 4len here35.41 km63%total56 km
- Gilleland Creekord 2len here34.90 km100%total35 km
- Wilbarger Creekord 3len here31.47 km83%total38 km
- Cottonwood Creekord 4len here30.56 km74%total41 km
- Williamson Creekord 3len here23.41 km100%total23 km
- Walnut Creekord 3len here21.85 km23%total95 km
- Onion Creekord 6len here21.00 km24%total87 km
- Maha Creekord 1len here19.91 km64%total31 km
- Slaughter Creekord 2len here18.39 km100%total18 km
- Commons Ford Creekord 6len here17.34 km100%total17 km
40 more river segmentssorted by Strahler order + length
- Pedernales Riverord 4len here16.62 km9%total181 km
- Elm Creekord 4len here16.52 km13%total128 km
- Big Sandy Creekord 2len here15.37 km30%total51 km
- Cottonwood Branchord 1len here14.70 km64%total23 km
- Kincheon Branchord 1len here14.19 km100%total14 km
- Cypress Creekord 2len here12.33 km32%total39 km
- Hog Pen Creekord 6len here11.19 km100%total11 km
- Bear Creekord 4len here11.00 km14%total79 km
- Foster Branchord 1len here10.68 km100%total11 km
- Bee Creekord 2len here10.49 km41%total26 km
- Bloody Holloword 2len here9.51 km100%total10 km
- Bull Creekord 3len here8.90 km11%total79 km
- Harris Branchord 1len here8.22 km100%total8 km
- North Fork Dry Creekord 1len here8.10 km100%total8 km
- Flat Creekord 6len here7.90 km21%total38 km
- Wells Branchord 1len here7.50 km100%total8 km
- Limekiln Branchord 1len here6.15 km100%total6 km
- Taylor Slough Northord 6len here5.83 km100%total6 km
- Tannehill Branchord 1len here5.33 km100%total5 km
- Long Holloword 1len here4.83 km100%total5 km
- Hurst Creekord 1len here4.69 km100%total5 km
- Post Oak Creekord 6len here4.69 km36%total13 km
- Hamilton Creekord 4len here4.48 km22%total20 km
- Pool Canyonord 6len here4.29 km100%total4 km
- Johnson Branchord 6len here4.02 km100%total4 km
- West Bull Creekord 2len here3.61 km100%total4 km
- Mustang Branchord 3len here2.93 km19%total16 km
- Little Bear Creekord 1len here2.82 km17%total16 km
- Cow Creekord 4len here2.61 km39%total7 km
- South Boggy Creekord 1len here2.60 km100%total3 km
- Cherry Holloword 1len here2.41 km100%total2 km
- Long Branchord 2len here2.38 km31%total8 km
- Shoal Creekord 6len here1.41 km100%total1 km
- Grape Creekord 3len here1.38 km5%total28 km
- Panther Holloword 1len here1.38 km100%total1 km
- Danz Creekord 1len here1.32 km100%total1 km
- Heinz Branchord 4len here1.07 km100%total1 km
- Marble Creekord 1len here0.92 km100%total1 km
- Brushy Creekord 3len here0.32 km0%total135 km
- Roy Creekord 1len here0.08 km4%total2 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
4hab/km²
Night light
10,3nW
Built-up
448,4%
Pesticides
9,0kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas71
IUCN V · 71
Balcones Canyonlands
IUCN VPreserve · 1974
75 km²
Shield Ranch
IUCN VEasement · 1998
19 km²
Barton Creek Macrosite Fee
IUCN VPrivate Conservation Land · 1994
16 km²
Walnut Creek
IUCN VGreenbelt
4 km²
Barton Creek
IUCN VGreenbelt
3 km²
Complete list71 protected areas
- Balcones CanyonlandsNational Wildlife RefugeIUCN V109 km²
- Balcones CanyonlandsPreserveIUCN V197475 km²
- Shield RanchEasementIUCN V199819 km²
- Barton Creek Macrosite FeePrivate Conservation LandIUCN V199416 km²
- Walnut CreekGreenbeltIUCN V4 km²
- Barton CreekGreenbeltIUCN V3 km²
- Balcones Canyonlands Preserve SystemPreserveIUCN V2 km²
- Canyon CkLocal Conservation AreaIUCN V2 km²
- Decker Tallgrass PrairiePreserveIUCN V1 km²
- IndiangrassWildlife SanctuaryIUCN V1 km²
- Lake PflugervilleCity LakeIUCN V20091 km²
- Camp ChautauquaRegional PreserveIUCN V1 km²
- Hamilton PoolPreserveIUCN V19901 km²
- Bright LeafNatural AreaIUCN V1 km²
- Onion CreekGreenbeltIUCN V1 km²
- Upper Bull CreekGreenbeltIUCN V1 km²
- Onion CreekWildlife SanctuaryIUCN V1 km²
- Blowing Sink Research MaCity PreserveIUCN V1 km²
- Cypress Creek Macrosite FeePrivate Conservation LandIUCN V19941 km²
- Stephenson Nature Preserve & Outdoor Education CenterNature PreserveIUCN V1 km²
- Latta BranchGreenbeltIUCN V1 km²
- Lower Bull CreekGreenbeltIUCN V1 km²
- Grassland Reserve Program (GRP), Travis, TXReserve ProgramIUCN V20130 km²
- Gaines CreekGreenbeltIUCN V0 km²
- Sunset ValleyNatural AreaIUCN V0 km²
- Williamson Creek EastGreenbeltIUCN V0 km²
- Colorado/WalnutGreenbeltIUCN V0 km²
- CanyonlandsParkIUCN V0 km²
- Shoal CreekGreenbeltIUCN V0 km²
- Williamson Creek CentralGreenbeltIUCN V0 km²
- St. EdwardsGreenbeltIUCN V0 km²
- ZilkerNature PreserveIUCN V0 km²
- Williamson Creek WestGreenbeltIUCN V0 km²
- East Boggy CreekGreenbeltIUCN V0 km²
- Hielscher TractGreenbeltIUCN V0 km²
- AARAL Corp.City PreserveIUCN V20080 km²
- Boggy CreekGreenbeltIUCN V0 km²
- Big Walnut CreekNature PreserveIUCN V0 km²
- Colorado River Park WIldlifeSanctuaryIUCN V0 km²
- South Park MeadowsGreenbeltIUCN V0 km²
- Blunn CreekNature PreserveIUCN V0 km²
- Steck ValleyGreenbeltIUCN V0 km²
- Timber CreekCounty PreserveIUCN V0 km²
- North Cat MountainGreenbeltIUCN V0 km²
- Marble CreekGreenbeltIUCN V0 km²
- Old San AntonioGreenbeltIUCN V0 km²
- Deer Park at Maple RunPreserveIUCN V0 km²
- Twin CreeksGreenbeltIUCN V20100 km²
- MayfieldNature PreserveIUCN V0 km²
- Stillhouse HollowNature PreserveIUCN V0 km²
- North StarGreenbeltIUCN V0 km²
- West Bouldin CreekGreenbeltIUCN V0 km²
- Johnson CreekGreenbeltIUCN V0 km²
- Blunn CreekGreenbeltIUCN V0 km²
- Nuckols Crossing of Slaughter CreekGreenbeltIUCN V0 km²
- Slaughter Creek at Twin OaksGreenbeltIUCN V0 km²
- Shinoak ValleyGreenbeltIUCN V0 km²
- Wells CreekGreenbeltIUCN V0 km²
- South Boggy CreekGreenbeltIUCN V0 km²
- Goat Cave KarstNature PreserveIUCN V0 km²
+ 11 protected areas (top 60 shown)
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN