3. Pineywoods The timber industry is the largest source of jobs and income in the region. 4. Gulf Prairies and MarshesAgriculture is veryprevalent in this region. 5. Post Oak Savannah The Post Oak Savannah is atransition zone between the blackland prairies to thewest and the Pineywoods tothe east. Oak Savannah ecoregion. Post Oak Savannah. State Parks, WMA s and. National. Wildlife Refuges. T Y. 60. In his. Texas Natural. History: A Century of Change, he calls the region both post oak savannah and post oak woodland. These woodlands, he notes, occupy a strip no. Trading card issued as part of the Geocache Challenge program for Purtis Creek. State Park, depicting a slice of a tree on a field of clover, with labels marking certain rings. There is information about the region on the back. The district is bordered by the Cross Timbers and Prairies Ecoregion to the west, and the Pineywoods Ecoregion to the east. The western 13 counties, or portions thereof (see Texas Ecoregion Map fall within the Blackland Prairie Ecoregion. The remaining 18 counties fall within the Post Oak Savannah Ecoregion. Average). Vegetation Description. The Post Oak Savannah is dominated by native bunch grasses and forbs with scattered post oaks and some plateau live oak, black hickory, and blackjack oak. In recent times this historical vegetation has been replaced by species such as yaupon holly, cedar elm, sugarberry, and eastern red cedar.
The Post Oak Savannah is a transition zone between the blackland prairies to the west and the Pineywoods to the east. This ecosystem is part of a historic. These plants have been identified as particularly worrisome terrestrial invasive species in the Post Oak Savannah ecoregion. Click on their scientific names to go to.