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Response of Deeproot Sedge (Cyperus entrerianus) to Herbicide and Prescribed Fire in Texas Coastal Prairie

  • Jonathan R. King (a1), Andrew J. Bennett (a1), Warren C. Conway (a1), David J. Rosen (a2) and Brian P. Oswald (a1)...

Abstract

Introduced accidentally from South America, deeproot sedge is rapidly expanding in a variety of habitats throughout the southeastern United States. Of particular concern is its rapid expansion, naturalization, and formation of monocultures in Texas coastal prairie, one of the most imperiled temperate ecoregions in North America. The objective of this research was to examine how deeproot sedge responds to prescribed fire, to the herbicide imazapic, and to treatment combinations of both. Combinations of prescribed fire and imazapic treatments and imazapic-only treatments effectively reduced deeproot sedge cover and frequency. However, plots exposed to dormant season fires (with no imazapic) had greater deeproot sedge cover after burn treatments were applied, indicating that coastal prairie management using only dormant season prescribed fire will not work toward reduction or management of this exotic invasive species. Although deeproot sedge cover was often reduced in fire–imazapic treatment combinations, it was still present in treatment plots. Moreover, desirable functional plant groups (i.e., native bunchgrasses) did not respond positively to the fire–imazapic treatments, but in some instances, woody plant coverage increased. Repeated, long-term approaches using integrated and coordinated efforts with multiple treatment options will be necessary to restore community structure to desired compositional levels. Such integrated approaches should be effective in reducing deeproot sedge frequency, cover, and extent to more manageable levels throughout its introduced geographic range.

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Corresponding author

Corresponding author's E-mail: warren.conway@ttu.edu

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Current address: Southwest Louisiana National Wildlife Refuge Complex, Bell City, LA 70630

Current address: Department of Natural Resources Management, Texas Tech University, Lubbock, TX 79409-2125

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References

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Keywords

Response of Deeproot Sedge (Cyperus entrerianus) to Herbicide and Prescribed Fire in Texas Coastal Prairie

  • Jonathan R. King (a1), Andrew J. Bennett (a1), Warren C. Conway (a1), David J. Rosen (a2) and Brian P. Oswald (a1)...

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