Lower Rio Grande Valley National Wildlife Refuge
IUCN IVMarine Protected Area · 1979
397 km²
County · USA
Starr
United States
BShArid, steppe, hot(100 %)
Species observed
2 229
Observations
367 155
Area
3 142,6km²
Ecological tissue
Sample of 32 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 Starr : 23 espèces reliées par 64 interactions GloBI sur 3 types (connectance 12.9%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
32
Interactions affichées
64
Connectance
0.129
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
2 229 distinct species · 367 155 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
23,8°C
Annual rain
598mm
Warmest m°
36,6°C
Coldest m°
11,5°C
Elevation: 108 m on average (min 40 m, max 174 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
23,8°C
Annual rain
598mm
Warmest month
36,6°C
Coldest month
11,5°C
Mean alt.
108m
Min
40m
Max
174m
Std. dev.
29m
Köppen-Geiger (dominant)
BShArid, steppe, hot(100 %)Arid
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
7,7
Org. C
11,0g/kg
Clay
24,3%
Sand
50,3%
Silt
25,4%
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
7,7
Org. C
15,0g/kg
Clay
22,8%
Sand
51,5%
Silt
25,7%
5–15 cm
pH H₂O
7,7
Org. C
10,9g/kg
Clay
23,8%
Sand
50,6%
Silt
25,6%
15–30 cm
pH H₂O
7,8
Org. C
7,1g/kg
Clay
26,3%
Sand
48,6%
Silt
25,0%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest13.9%
Crops16.8%
Built-up0.3%
Bare soil6.3%
Other (grassland, water…)62.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology10 basins · 1 lakes · 20 rivers
Hydrology metrics for this exact territory
Stream length here
392,7km
Lake surface here
3,37km²
Basins crossed
10
Max stream order
7
Max drainage
470 916km²
Discharge in basins
497,6m³/s
Mean precip.
564mm/an
Mean T°
22,9°C
Moisture idx
-0,66
Mean runoff
16mm/an
Mean elev. (basins)
106m
Watersheds crossing here
- Bassin de Los Olmos Creeksub-area1 376,7 km²overlap1105.51 km²35%
- Bassin de Río Bravo / Rio Grandesub-area913,1 km²overlap600.43 km²19%
- Basin #91370sub-area761,9 km²overlap450.51 km²14%
- Bassin de Río Bravo / Rio Grandesub-area751,7 km²overlap311.07 km²10%
- Bassin de la Joya Creeksub-area388,7 km²overlap216.07 km²7%
- Basin #91740sub-area1 026,9 km²overlap215.95 km²7%
- Bassin de Río Bravo / Rio Grandesub-area388,2 km²overlap208.25 km²7%
- Bassin de Arroyo del Tigre Chiquitasub-area650,2 km²overlap18.86 km²1%
- Bassin de Río Bravo / Rio Grandesub-area34 km²overlap15.93 km²1%
1 more basinssorted by overlap
Lakes (1, top by area)
Rivers / streams (20, ord ≥ 4)
- Los Olmos Creekord 4len here82.85 km98%total85 km
- Río Bravo / Rio Grandeord 7len here62.31 km2%total3249 km
- Garcias Creekord 7len here61.49 km100%total62 km
- Las Escobas Creekord 2len here29.12 km100%total29 km
- La Joya Creekord 3len here23.26 km60%total38 km
- Remadura de Sandia Creekord 3len here22.52 km62%total36 km
- Arroyo la Minitaord 2len here21.26 km100%total21 km
- Olmitos Creekord 1len here20.30 km98%total21 km
- El Chapote Creekord 3len here18.46 km100%total18 km
- Arroyo Morterosord 7len here9.75 km69%total14 km
- Salado Creekord 2len here8.59 km11%total80 km
- El Sauz Creekord 3len here6.83 km100%total7 km
8 more river segmentssorted by Strahler order + length
- Del Puerto Creekord 1len here5.79 km100%total6 km
- Remadura de Charco Largo Creekord 1len here4.83 km24%total20 km
- Retamoso Creekord 1len here4.67 km100%total5 km
- Rio Grandeord 7len here4.07 km0%total1320 km
- Arroyo Quemadoord 1len here2.97 km100%total3 km
- Ramirez Creekord 1len here2.32 km100%total2 km
- Río Bravoord 7len here1.26 km25%total5 km
- Río San Juanord 6len here0.01 km0%total499 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,7nW
Built-up
29,0%
Pesticides
26,9kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas3
IUCN IV · 2IUCN V · 1🌊 Marine · 3
Lower Rio Grande Valley
IUCN IVNational Wildlife Refuge
391 km²
Las Palomas
IUCN VWildlife Management Area
14 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN