Invasive plant species in urban green spaces: risk perception and change in species occurrence**

外来入侵植物不仅对环境造成严重影响，而且给人类社会带来巨大的经济损失。一旦成功建立，就不可能根除一些入侵植物物种。因此，预防工作被认为是今后减少影响的最佳战略。预防工作只有得到公众的支持才能有效。我们建议进行风险认知分析，评估公众对入侵物种的知识和风险认知。调查结果将为改进入侵物种传播的预防奠定基础，因为它们将告知管理人员他们应该针对谁进行宣传和教育工作。随着市政当局对城市绿色空间中入侵物种的发生进行反复调查，他们的任务是量化和解释观察到的变化。然而，目前没有关于报告这些变化的标准。拟议的入侵物种发生变化量化评估将提高入侵物种发生的报告标准。最终，拟议的工作将使钻石头咨询公司能够为城市管理者改进其入侵物种管理战略。他们将能够为客户提供1）统计上合理的入侵物种发生变化的分析，以及2）如何改进其推广和教育工作以防止入侵物种传播的策略。关于如何评估入侵物种发生的变化以及如何改进宣传和教育工作的拟议方法可以适用于不列颠哥伦比亚省和加拿大其他城市地区。

Invasive plants exert not only adverse impacts on the environment, but also economic costs on human society. Once successfully established, it can be impossible to eradicate some invasive plant species. Thus, prevention efforts are considered the best strategy for future impact reduction. Prevention efforts are only effective if they are supported by the general public. We propose to perform a risk perception analysis that assesses the public's knowledge and risk perception about invasive species. The results of the survey will lay the groundwork improving prevention of invasive species spread as they will inform managers about who they should target for their outreach and education efforts. As municipalities conduct repeated surveys of invasive species occurrence in urban green spaces, they are tasked with quantifying and interpreting observed changes. Yet, there are currently no standards on reporting these changes. The proposed assessment on quantifying changes in invasive species occurrence will improve reporting standards of invasive species occurrence. Ultimately, the proposed work will allow Diamond Head Consulting to improve its invasive species management strategies for urban managers. They will be able to provide their clients with 1) analysis of change in invasive species occurrence that is statistically sound, and 2) strategies on how to refine their outreach and education efforts to prevent invasive species spread. The proposed approach on how to assess changes in invasive species occurrence and how to improve outreach and education efforts can then be adapted to other urban areas in BC and across Canada.