Understanding the ways in which alien taxa threaten human well-being, beyond purely monetary costs, can be difficult as impacts differ vastly across social, cultural, and economic contexts. Failure to capture impacts outside of monetary costs means that impacts are unfairly weighted towards those that can be easily monetised, which is unlikely to be a realistic measure of how alien species truly affect human well-being. To address this issue, the Socio-Economic Impact Classification for Alien Taxa (SEICAT) was developed with the intention to facilitate standardised classifications and comparisons of the impacts of alien taxa on human well-being and livelihood. The framework measures impacts by assessing to what extent alien taxa have altered human activities, so has application across a broad range of reported impacts associated with different constituents of human well-being. Although in their original paper, Bacher et al. (2018) provided an overview of the SEICAT framework, comprehensive guidelines that enable assessors to overcome potential ambiguities were, until now, unavailable. This may be preventing the broad application of the framework due to reduced usability. Here, we provide clarification and guidance for the application of SEICAT to facilitate standardised, consistent assessments. In particular, we address uncertainties stemming from unclear definitions of impacted communities and activities, as well as the spatial and temporal scales of relevance. We clarify these key issues and give explicit recommendations, whilst encouraging the collection of additional contextual information to be recorded for each assessed impact report, to generate more practical information for end-users of SEICAT data. Further, we recommend adopting an alternative terminology for the impact categories to reduce the potential misuse of the current descriptors. The intended outcome of this work is to aid the broad application of the SEICAT framework in a consistent and transparent manner.

中文翻译：

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关于使用外来分类单元社会经济影响分类 (SEICAT) 框架的澄清和指导

 除了纯粹的货币成本之外，了解外来类群威胁人类福祉的方式可能很困难，因为不同社会、文化和经济背景的影响存在巨大差异。未能捕捉到货币成本之外的影响意味着影响不公平地偏向那些可以轻松货币化的影响，这不太可能成为衡量外来物种如何真正影响人类福祉的现实衡量标准。为了解决这个问题，制定了外来类群社会经济影响分类（SEICAT），旨在促进外来类群对人类福祉和生计影响的标准化分类和比较。该框架通过评估外来类群在多大程度上改变了人类活动来衡量影响，因此适用于与人类福祉不同组成部分相关的广泛报告影响。尽管在他们的原始论文中，Bacher 等人。(2018) 概述了 SEICAT 框架，但迄今为止，还没有使评估人员能够克服潜在歧义的综合指南。由于可用性降低，这可能会阻碍该框架的广泛应用。在这里，我们为 SEICAT 的应用提供澄清和指导，以促进标准化、一致的评估。我们特别要解决因受影响的社区和活动的定义不明确以及相关的时空尺度而产生的不确定性。我们澄清这些关键问题并给出明确的建议，同时鼓励收集额外的背景信息以记录每个评估影响报告，以便为 SEICAT 数据的最终用户生成更多实用信息。此外，我们建议对影响类别采用替代术语，以减少当前描述符的潜在误用。这项工作的预期成果是以一致和透明的方式帮助 SEICAT 框架的广泛应用。