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Assessing Stakeholder Perspectives on Invasive Plants to Inform Risk Analysis

Published online by Cambridge University Press:  20 January 2017

Emily J. Kapler ,
Janette R. Thompson  and
Mark P. Widrlechner
Emily J. Kapler
Affiliation:
Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA 50011
Janette R. Thompson*
Affiliation:
Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA 50011
Mark P. Widrlechner
Affiliation:
USDA-ARS Horticulturist (North Central Regional Plant Introduction Station, retired) Departments of Ecology, Evolution, and Organismal Biology and Horticulture, Iowa State University, Ames, IA 50011
*
Corresponding author's E-mail: jrrt@iastate.edu
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Abstract

Conservation and land management decisions often are based primarily on natural science, but could be more successful if human influences were effectively integrated into decision making. This is especially true for efforts to manage invasive plants, whose arrival is usually the product of deliberate human introduction. Risk-assessment models that predict the probability that a nonnative plant will naturalize or invade are useful tools for managing invasive plants. However, decisions based on such models could affect stakeholders differently. Careful assessment of risk-analysis methodologies should consider the importance of stakeholder participation. We surveyed the perceptions of four stakeholder groups (conservation professionals, master gardeners, professional horticulturists, and woodland landowners) in Iowa about invasive plants, general management approaches, and risk-assessment models. We also examined whether or not a stakeholder's nature relatedness plays a role in shaping his or her responses. Stakeholder perceptions varied less than expected across all four groups. Eighty-seven percent of respondents agreed invasive plants are a problem, and 88.4% agreed that we have a responsibility to manage them to protect natural areas. Support for the use of risk-assessment models also was high, with 78.7% of respondents agreeing that their use has potential to prevent plant invasions. Nature relatedness scores for all groups were correlated with respondent perspectives on invasive plants. Respondents believed biologically significant error rates (errors that might introduce a new invasive plant) should not exceed 5 to 10%. Respondents were more tolerant of horticulturally limiting errors (errors that restrict sale/use of a plant that would not have become invasive), reporting rates of 10 to 20% as acceptable. Researchers developing risk-assessment models might wish to aim for error rates within these bounds. General agreement among these stakeholder groups suggests potential support for future risk-management efforts related to invasive plants.

Keywords

Nature relatednessinvasive awarenessrisk-assessment modelssurvey
Type
Research Article
Information
Invasive Plant Science and Management , Volume 5 , Issue 2 , June 2012 , pp. 194 - 208
Copyright
Copyright © Weed Science Society of America 

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