葫芦影

Houston鈥檚 coastal prairies and wetlands are vital ecosystems that support diverse wildlife, filter water, and help prevent floods. Coastal prairies, rich in native grasses and wildflowers, are among the most endangered habitats, while wetlands act as natural sponges, protecting against erosion and providing crucial wildlife habitat. Conservation is key to preserving their ecological benefits amid urbanization and climate change.

Coastal Prairie

While the UH Coastal Center contains multiple types of habitat, coastal prairie is the highlight. At the core is the 100-acre Aumann Prairie, named in memory of Dr. Glenn Aumann, a former UH provost and former UH Natural Sciences & Mathematics dean, who was an enthusiastic supporter of UHCC.

The Aumann Prairie, which has never been plowed, represents a slice of what used to be a vast expanse of coastal prairie habitat along the Texas and Louisiana Gulf Coast. It is estimated that of the 6.5 million acres of coastal prairie originally blanketing the Texas Gulf Coast, less than 1% remains. The high-quality Aumann Prairie is where UHCC鈥檚 coastal prairie management program began and represents the goal of our ongoing restoration work.

High Level of Plant Biodiversity

The hallmark of coastal prairie is the domination of the relatively flat space by native perennial grass species and a marked absence of trees, except along riparian or wetland areas or as isolated clumps. The UHCC coastal prairie contains all of the 鈥淏ig Four鈥� of coastal tallgrass prairie: Big Bluestem, Little Bluestem, Switchgrass, and Yellow Indiangrass. However, as a representative of high-quality coastal prarie, UHCC is home to a high level of plant biodiversity. Over 364 species of plants have been identified at UHCC. Our herbarium collection includes representatives of most of these.

Big Bluestem (Andropogon gerardii)

Little Bluestem (Schizachyrium scoparium)

Yellow Indiangrass (Sorghastrum nutans)

Switchgrass (Panicum virgatum). Courtesy of Dr. John Lienhard

Coastal Prairie Habitat Management

Currently, just over 300 acres at UHCC are actively managed as coastal prairie habitat or in the process of restoration. We employ mowing, herbiciding, and prescribed burning to manage our restored coastal prairie units. Areas which were once coastal prairie and which have been degraded by invasive species undergo restoration through a series of treatments involving initial mechanical removal of invasive woody species. This treatment is followed by a combination of shredding, herbiciding, mowing, and prescribed burning.

In areas heavily infested by dense, tall stands of Chinese tallow trees, aerial application of selective herbicide is an option as the initial restoration step. However, the total of suitable acreage to be sprayed and the costs of equipment mobilization are decisive factors in determining whether this methodology is economically feasible.

The exact combination and timing of restorative actions depends upon site characteristics.

The UHCC lies within the Highland Bayou watershed and has experienced recent and historic flooding. During winter months when grasses and forbs are dormant, it is common to see standing water on parts of the prairie. Yet during the summer, when rainfall is sparse, coastal prairie plants can still survive, thrive, and set seed to begin another seasonal cycle. This is because one of the benefits of coastal prairie habitat is that their native plant species evolved to withstand climate conditions ranging from flooding to drought.

Prairies also evolved with fire and grazing by bison, which is why we are able to successfully utilize prescribed fire as one of our coastal prairie management tools. Within days of a prescribed burn, the coastal prairie will return to green from black. A coastal prairie burned at the beginning of the year will experience a succession of flowering species鈥攆orbs and grasses鈥攊n subsequent months of the year, all of which will set seed in preparation for another cycle of seasonal plant succession the following year.

A 360-degree photo of the Aumann Prairie taken five months after a prescribed burn. Courtesy of Jaime Gonzalez, Texas Nature Conservancy.

Wetlands

The 葫芦影业 Coastal Center and its Institute encompasses more than healthy coastal prairie and coastal prairie under restoration. Within our 925 acres, we have wetland and forested wetland that forms a mosaic with the coastal prairie. This enhances the opportunities for research and education and provides greater diversity of habitat to support wildlife.

Wetland areas

All the wetland areas at 葫芦影业 Coastal Center are manmade. Two were constructed by the Coastal Center. The larger of the two is about five acres. It has gradually become more naturalized with emergent vegetation and is ringed by trees. A smaller wetland was excavated somewhat deeper and is less naturalized. However, both support a fish population and provide a water source for wildlife. 

             

Additional wetland areas are relicts from the 葫芦影业 Coastal Center鈥檚 history. The key factor responsible for the current hydrology at 葫芦影业 Coastal Center is its history as the site of Camp Wallace during World War 2. Before the construction of Camp Wallace in 1940, the site was coastal prairie rangeland and a wet prairie. Camp Wallace required   construction of roads and drainage systems that radically altered site hydrology. The construction of 17 miles of oyster shell roads and parallel ditches changed the flow of water across the landscape. Although historic maps of the camp do not show any excavated wetlands, they are obviously manmade. We believe that they were part of the drainage system that was installed when Camp Wallace was constructed. Now, they serve as wildlife resources. 葫芦影业 Coastal Center recognizes that most of the wetland areas could be enhanced to provide greater wildlife benefits. Wetland enhancement is included in the long-range restoration plans.

Forested Wetland 

There is also a small, forested area with large, prominent live oaks. We cannot be certain whether the live oaks trees grew naturally or if they were planted during the Camp Wallace era. During the winter months, the area tends to collect rainfall, also a consequence of the Camp Wallace road network. Especially during the summer, this forested area is a shelter and shade haven for wildlife as it is located directly across the road from a sunny coastal prairie area.

Although all the wetland areas鈥攁nd maybe even the live oaks鈥攁re due to human manipulation, they contribute greatly to habitat diversity at the Coastal Center, allowing a richer diversity of wildlife and plant species. The 葫芦影业 Coastal Center plans to maintain and enhance these areas for their wetland and forest habitat  contributions.