Five Ecoregions of Texas. What Is An Ecoregion? Ecoregion – a major ecosystem with distinctive...
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Transcript of Five Ecoregions of Texas. What Is An Ecoregion? Ecoregion – a major ecosystem with distinctive...
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Five Ecoregions of TexasFive Ecoregions of Texas
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What Is An Ecoregion?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 bioregionSmaller than a biome
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Where Are They?Where Are They?
Region 1: Pineywoods
Region 2: Gulf Coast Prairies and Marshes
Region 3: Edwards Plateau
Region 4: High Plains
Region 5: Trans Pecos
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Region 1Region 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
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Region 2Region 2
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
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Region 3Region 3Edwards 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
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Region 4Region 4
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
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Region 5Region 5
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