Ecoregions of Texas
What Is An Ecoregion?
• Ecoregion - a major ecosystem with
distinctive geography, characteristic plants and
animals, ecosy...
Where Are They?
• Region 1: Pineywoods
• Region 2: Cross Timbers or Oak Woods
and
Prairies
• Region 3: Blackland Prairies
...
Where Are They?
• Region 6: South Texas Brush Country
• Region 7: Edwards Plateau
• Region 8: Llano Uplift
• Region 9: Rol...
Region 1
Piney Woods
• Climate: average annual rainfall of 36 to 50 inches is fairly
uniformly distributed throughout the ...
Region 2
Cross Timbers or Oak Woods & Prairies
•Climate: Average annual rainfall averages 28 to 40 inches
per year
•Soil: ...
Region 3
Blackland Prairies
•Climate: average annual rainfall ranges from 28 to 40
inches. May is the peak rainfall month ...
Region 4
Gulf Coast Prairies and Marshes
•Climate: annual rainfall varies from 30 to 50 inches per
year, high humidity and...
Region 5
Coastal Sand Plains
•Climate: Average annual rainfall is 24 to 28 inches per
year
•Soil: primarily sands
•Elevati...
Region 6
South Texas Brush Country
•Climate: average annual rainfall of 16 to 35 inches
increases from west to east. Summe...
Region 7
Edwards Plateau
•Climate: average annual rainfall ranges from 15 to 34
inches
•Soil: usually shallow with a varie...
Region 8
Llano Uplift
•Climate: averages about 24 to 32 inches per year
•Soil: coarse textured sands, produced from weathe...
Region 9

Rolling Plains
•Climate: average annual rainfall is 20 to 28 inches; dry
summers with high temperatures and high...
Region 10
High Plains
•Climate: extended droughts have occurred several times
this century
•Soil: surface texture of soils...
Region 11
Trans Pecos
Climate: 9-15 inches of rain; semi-arid, warm, dry winters
Soil: generally shallow, saline, and unpr...
My Ecoregion
• Which region do you live in?
• Have you ever visited another region?
12 s070502 h_ecoregions of texas ppt1(1)
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12 s070502 h_ecoregions of texas ppt1(1)

  1. 1. Ecoregions of Texas
  2. 2. What Is An Ecoregion? • Ecoregion - a major ecosystem with distinctive geography, characteristic plants and animals, ecosystems, and receiving uniform solar radiation and moisture – Sometimes called an ecological region or bioregion – Smaller than a biome
  3. 3. Where Are They? • Region 1: Pineywoods • Region 2: Cross Timbers or Oak Woods and Prairies • Region 3: Blackland Prairies • Region 4: Gulf Coast Prairies and Marshes • Region 5: Coastal Sand Plains
  4. 4. Where Are They? • Region 6: South Texas Brush Country • Region 7: Edwards Plateau • Region 8: Llano Uplift • Region 9: Rolling Plains • Region 10: High Plains • Region 11: Trans Pecos
  5. 5. Region 1 Piney Woods • Climate: average annual rainfall of 36 to 50 inches is fairly uniformly distributed throughout the year, and humidity and temperatures are typically high • Soil: generally acidic and mostly pale to dark gray sands or sandy loams • Elevation: ranges from 200 to 500 feet above sea level • Geography: rolling terrain • Vegetation: pine and oak tall hardwood forests with scattered areas of cropland, planted pastures, native pastures, and rich bottomlands
  6. 6. Region 2 Cross Timbers or Oak Woods & Prairies •Climate: Average annual rainfall averages 28 to 40 inches per year •Soil: Upland soils are light colored, acidic sandy loam or sands. Bottomland soils may be light brown to dark gray and acidic with textures ranging from sandy loams to clays •Elevation: ranges from 300 to 800 feet above sea level •Geography: gently rolling to hilly terrain •Vegetation: oak savannah, where patches of oak woodland alternate with grassland
  7. 7. Region 3 Blackland Prairies •Climate: average annual rainfall ranges from 28 to 40 inches. May is the peak rainfall month for the northern end of the region; however, the south-central part has a fairly uniform rainfall throughout the year. •Soil: soils are uniformly dark-colored alkaline clays interspersed with some gray acidic sandy loams. •Elevation: ranges from 300 to 800 feet above sea level •Geography: gently rolling to nearly level terrain •Vegetation: food and forage crops
  8. 8. Region 4 Gulf Coast Prairies and Marshes •Climate: annual rainfall varies from 30 to 50 inches per year, high humidity and warm temperatures •Soil: acidic sands and sandy loams, with clays occurring in the river bottoms •Elevation: nearly level, less than 150 feet above sea level, cut by streams and rivers flowing into the Gulf of Mexico •Geography: barrier islands along the coast, marshes near bays and estuaries, and prairies •Vegetation: salt grass, tallgrass prairies, live oak woodlands, mesquite and acacias, oaks scattered along the coast, and tall woodlands in the river bottomlands
  9. 9. Region 5 Coastal Sand Plains •Climate: Average annual rainfall is 24 to 28 inches per year •Soil: primarily sands •Elevation: fairly level with elevations less than 150 feet above sea level •Geography: windblown sands and unstable dunes with grasslands, stands of oak, and salt marshes •Vegetation: tallgrass prairie with live oak woodlands, mesquite savannah, and salt marshes
  10. 10. Region 6 South Texas Brush Country •Climate: average annual rainfall of 16 to 35 inches increases from west to east. Summer temperatures are high, with very high evaporation rates •Soil: alkaline to slightly acidic clays and clay loams and shallow caliche soils •Elevation: ranges from sea level to 1000 feet •Geography: flat plains to gently rolling terrain •Vegetation: thorny shrubs, trees, and cactus scattered with patches of palms and subtropical woodlands
  11. 11. Region 7 Edwards Plateau •Climate: average annual rainfall ranges from 15 to 34 inches •Soil: usually shallow with a variety of surface textures, underlain by limestone •Elevation: ranges from slightly less than 100 feet to over 3,000 feet above sea level •Geography: many springs, stony hills, and steep canyons and caves; several river systems dissect the surface, creating a rough and well-drained landscape •Vegetation: grasslands, juniper/oak woodlands, and plateau live oak or mesquite savannah
  12. 12. Region 8 Llano Uplift •Climate: averages about 24 to 32 inches per year •Soil: coarse textured sands, produced from weathered granite over thousands of years •Elevation: ranges from 825 to 2,250 feet above sea level •Geography: some of the oldest rocks in Texas, the region contains unique minerals and rock formations and large granite domes; hilly to rolling landscape •Vegetation: oak-hickory or oak-juniper woodlands, mesquite-mixed brush savannah, and grasslands
  13. 13. Region 9 Rolling Plains •Climate: average annual rainfall is 20 to 28 inches; dry summers with high temperatures and high evaporation rates •Soil: vary from coarse sands along outwash terraces by streams, to clays and shales •Elevation: ranges from 800 to 3,000 feet above sea level •Geography: gently rolling hills and broad flats are cut by several rivers and their tributaries •Vegetation: mesquite and shortgrass savannah; various hardwood species along streams, juniper on steep slopes along rivers
  14. 14. Region 10 High Plains •Climate: extended droughts have occurred several times this century •Soil: surface texture of soils ranges from clays in the north to sands in the south; Caliche underlies these surface soils at depths of two to five feet •Elevation: ranges from 3,000 to 4,500 feet above sea level •Geography: relatively level high plateau •Vegetation: mostly irrigated cropland; native vegetation includes mesquite and juniper
  15. 15. Region 11 Trans Pecos Climate: 9-15 inches of rain; semi-arid, warm, dry winters Soil: generally shallow, saline, and unproductive Elevation: 2,000 feet to mountain ranges, highest peak is 8,751 feet above sea level Geography: salt basins, sand hills, rugged plateaus, mountain slopes Vegetation: desert grassland, desert scrub, coniferous and mixed hardwood forests at mountain peaks
  16. 16. My Ecoregion • Which region do you live in? • Have you ever visited another region?

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