EPA Science Inventory

Wetland and riparian plant communities at risk of invasion by transgenic-resistant Agrostis stolonifera in Central Oregon

Citation:

BOLLMAN, M. A., M. STORM, G. KING, AND L. S. WATRUD. Wetland and riparian plant communities at risk of invasion by transgenic-resistant Agrostis stolonifera in Central Oregon. Plant Ecology. Springer Netherlands, , Netherlands, 213:355-370, (2012).

Description:

Creeping bentgrass (Agrostis stolonifera) and redtop (A. gigantea) are introduced turfgrasses that are naturalized throughout the northern U.S. Interest in creeping bentgrass has risen following the 2003 escape of a genetically modified (GM), herbicide-resistant cultivar near Madras, Oregon. The objectives of this study were to characterize the floristic attributes of the plant communities associated with naturalized Agrostis populations in the Madras area, and to identify plant communities at risk of invasion by transgenic Agrostis. Vegetation data collected from 62 stratified random vegetation plots with and without A. stolonifera and A. gigantea identified 11 distinct plant communities. Community composition was strongly correlated with an indirect soil moisture index based on the wetland status of individual species. Results indicate that wetland plant communities are at the highest risk of invasion by transgenic A. stolonifera. Also, inter-specific gene flow to A. gigantea could affect additional habitats and plant communities where A. stolonifera is not found. Both A. stolonifera and A. gigantea were invasive in wetland and riparian settings in the Madras study area, and introducing glyphosate (e.g., Roundup®, Rodeo®) herbicide tolerance into these populations would eliminate the primary means of control for these species.

Purpose/Objective:

Creeping bentgrass (Agrostis stolonifera) and redtop (A. gigantea) are two introduced turfgrasses that are widely naturalized throughout the northern U.S. Interest in creeping bentgrass has risen following the 2003 escape of a genetically modified (GM), herbicide (Roundup®) resistant cultivar near Madras, Oregon, and the continued persistence of GM plants in the environment.

URLs/Downloads:

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 01/24/2012
Completion Date: 01/24/2012
Record Last Revised: 10/29/2012
Record Created: 03/30/2011
Record Released: 03/30/2011
OMB Category: Other
Record ID: 234409

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

WESTERN ECOLOGY DIVISION

ECOLOGICAL EFFECTS BRANCH