Gulf Coast Prairies and Marshes

By: Kade, Peyton, Carson, Kenzie, and Kelsey

Our Ecoregion

The Gulf Coast Prairies and Marshes stretch over 9,500,000 acres of Texas. It is less than 150 feet in elevation, riddled by rivers and small aquatic bodies. This ecoregion contains salt grass marshes, tall grass prairies, some oak parklands, and barrier islands along the coastline.

Abiotic Factors

Rainfall: This ecoregion receives around 30-50 inches of rain annually, and generally is equal among the area.

Landforms: Covered with beaches (obviously), and contains many landforms such as the Rio Grande, Balcones Fault, and is scattered with forests.

Elevation: The region is for the most part level, at its highest reaching around 150 feet above sea level, and at its lowest around the beaches, where its about sea level

Biotic Factors

There are many living things that make up the ecoregion, and the fauna include:

~A diverse population of aquatic animals, which contains fish, shrimp, alligators, and turtles.

~The land-living animals include coyote, frogs, mink, muskrat, and the occasional snake

~This region also contains many endangered animals, such as the ocelot, brown pelican, peregrine falcon, and Texas scarlet snake.

There is an even more diverse flora population, of which the following is included:

~Trees such as sugarberry, willow oak, and American elm.

~Grasses include eastern grammagrass, Gulf cordgrass, and inland sea-oats.

Agriculture and Economy

There is very little farming, with that being cotton, grain sorghum, and rice. Cattle ranches and fishing dominate the economy of the region. A part of the economy includes oil and natural gas, plastics, fertilizer, and petrochemical industries are a major factor. Shipping is also a major player in the ecoregion's economy, due the the proximity of the Gulf of Mexico.

Cities and Towns

Cities in this region include:

~Corpus Christi



~South Padre


Weathering, Erosion, and Deposition


Caused by the abrasion of the wind and sand, and physical weathering is caused by the moisture and water.


Caused by the tide, the occasional hurricane, the rivers and streams, most of which lead to the ocean, and the rain and wind.


Sediments and sand from the plains affect the coastlines and deltas, the latter being a direct product of this process.

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