Invasive alien species – framework for the identification of invasive alien species of EU concern
Year: 2014
Type: report
Abstract: Invasive alien species (IAS) are considered to be one of the greatest threats to biodiversity, particularly through their interactions with other drivers of change (MEA 2005, GBO 2011). In recent years the European Commission (EC) has intensified their commitment to provide a comprehensive, problem-oriented, well-balanced and manageable solution to IAS in Europe. The text of a European Union (EU) Regulation is expected to be adopted soon. A core component of the Regulation is a list of “IAS of EU concern” that will be drawn up together with European Member States (MS), based on scientifically robust risk assessments as laid down in the Regulation. \nRisk assessment is the technical and objective process of evaluating biological or other scientific and economic evidence to identify potentially invasive alien species and determine the level of invasion risk associated with a species or pathway and specifically whether an alien species will become invasive. An effective and robust risk assessment method is seen as an essential component of IAS management (Shine, Kettunen et al. 2010) and a fundamental element of an early warning and information system in Europe (Genovesi, Scalera et al. 2010). \nThe purpose of this project was to provide a review of available IAS risk analysis protocols and use this, coupled with expert opinion, to inform the development of minimum standards necessary to ensure effective risk assessment methods for the EU. Additionally we considered gaps in knowledge and scope of existing risk analysis methods. Thus, we provide recommendations for developing existing risk analysis methods within a framework of minimum standards. Methods compliant with the minimum standards will be of value for supporting the development of a draft list of “IAS of EU concern”. Such a list should include species that are already established within the EU but also be extended to a scoping study to consider species that are not yet established but that may present a significant threat to Europe in the near future. \nTask 1: Literature review and critical assessment of existing risk assessment methodologies on IAS \nThe purpose of the review was to critically assess the scope, robustness and effectiveness of current risk assessment methods and to provide information for their further development in the context of the study particularly underpinning the derivation of minimum standards. \nMore than 100 relevant publications were derived through a literature search. Only 70 publications provided original risk assessment protocols and their applications and of these 29 were selected through filtering to eliminate those which simply described the implementation of an existing protocol to a given geographic region or specific taxonomic groups without modification of the assessment protocol. These 29 protocols were examined further to derive key attributes of the risk assessment method to inform the development of minimum standards. Basic information for all 29 risk assessment methods was provided. Case studies for 14 of these protocols were included to provide further context for subsequent tasks. The 14 protocols included as case studies were selected on the basis of a number of criteria: relevance of the protocol to Europe, taxonomic breadth and/or geographic breadth, likely compliance with minimum standards and availability of experts with key involvement in the protocol to provide the case study. \nAt both the international and regional-level as well as among countries, there is huge variation in how the risks posed by alien species are assessed. Indeed risk assessment protocols vary widely in approach, objective, implementation and taxa covered, the majority are based on qualitative methods, even though the need to develop quantitative risk assessments has been recognised. Major hurdles preventing the use of quantitative risk assessment methods are the lack of data and challenges in interpretation and communication. \nTwo critical gaps were identified through this task: consideration of ecosystem services and evaluation of user-friendliness and consistency of outcomes. Very few risk assessment protocols reviewed specifically considered impacts on ecosystem services. Consistency in risk analysis has been recently discussed and assessed for pest risk analyses in the EU-funded project PRATIQUE and methods to improve consistency have been developed. PRATIQUE only considered the EPPO decision support scheme (EPPO DSS), however this work will be extended through consideration of additional risk assessments within the current EU-funded COST Action Alien Challenge. \nTask 2: Develop minimum standards for risk assessment methodologies \nThe review of characteristics of risk assessments through task 1 resulted in a long-list of attributes. The derived attributes ranged from broad consideration of general characteristics including description of the species through to criteria relevant to the invasion process including likelihood of arrival, establishment and spread. Impacts were classified broadly and included biodiversity and socio-economic impacts alongside perspectives influencing impacts such as climate change. Additional consideration was given to implementation of the protocol including quality assurance and alignment with agreed international standards and policies such as the World Trade Organisation (WTO) and relevant EU Directives including the EU Marine Strategy Framework Directive (MSFD) and EU Water Framework Directive (WFD). \nFrom the long-list the core project team developed and selected a draft short-list of attributes that were considered to be relevant for performing risk assessments of IAS. The short-list of minimum standards was agreed by the project team and preliminarily reviewed through a pre-workshop survey in Task 3. \nTask 3: Risk assessment workshop \nThe overarching aim of the risk assessment workshop (27-28th March 2014) was to peer-review the derived short-list of minimum standards. The derived minimum standards are required to underpin evaluation of existing risk assessments and ensure they are fit for the purpose of supporting the development of a list of “IAS of EU concern”. \nWe aimed to distil the critical components of a risk assessment that, through expert opinion and consensus, are agreed necessary to achieve overarching, robust and rigorous assessment of the risk of an IAS, regardless of the specific approach taken. Additionally consideration was given to recognized international guidelines and recommendations with relevance to the development of minimum standards for risk assessments. \nThe workshop included participants from the project team (23 experts from nine organisations) and 12 additional invited experts. The invited experts and those from within the team represented a breadth of expertise from a variety of perspectives including taxonomic (all taxa, including pathogens), environmental (freshwater, marine and terrestrial), impacts (environmental, socio-economic and health) and disciplines (ecologists, economist, conservation practitioners, scientists, policy-makers, risk assessors). Many of the experts had been actively involved in the development, testing and implementation of risk assessment protocols for IAS. \nThe experts were invited to review and refine the list of attributes derived through Tasks 1 and 2 for inclusion as potential minimum standards. The long list of attributes of risk assessments derived through Task 1 and 2 were circulated in the form of a pre-workshop survey (using Survey Monkey) in which the experts were asked to rank the importance of each as a potential minimum standard on a scale of 1 (low importance) to 5 (high importance). Experts were also asked to provide additional attributes that were not apparent from the long-list. \nThe pre-workshop survey revealed a high level of consensus between all experts for most of the attributes. However one-third of the experts stated that a totally new EU-wide risk assessment system tailored for the new IAS Regulation should be developed. Attributes aligning with socio-economic aspects also appeared to cause division in responses by the experts. Furthermore, questions relating to cost-benefit led to a high degree of uncertainty with more than a third of participants responding “unsure”. The disagreement or uncertainty expressed by respondents on these specific themes highlighted the need to ensure that socio-economic considerations were included as a substantial component of the workshop programme. \nClarity is an overarching requirement of risk assessment protocols to ensure consistency. It is of utmost importance that a protocol asks questions that are sufficiently clear and understandable for assessors. This is essential to ensure that responses (accompanied by an indication of level of uncertainty) deliver similar assessments for the same species in the same area, irrespective of the identity of the assessors – as long as these have the necessary expertise or are provided with the necessary information. \nFourteen criteria were agreed, through consensus methods, to represent the minimum standards. The minimum standards are: \n1.\tDescription (Taxonomy, invasion history, distribution range (native and introduced), geographic scope, socio-economic benefits) \n2.\tIncludes the likelihood of entry, establishment, spread and magnitude of impact \n3.\tIncludes description of the actual and potential distribution, spread and magnitude of impact \n4.\tHas the capacity to assess multiple pathways of entry and spread in the assessment, both intentional and unintentional \n5.\tCan broadly assess environmental impact with respect to biodiversity and ecosystem patterns and processes \n6.\tCan broadly assess environmental impact with respect to ecosystem services \n7.\tBroadly assesses adverse socio-economic impact&
Authors: Helen E. Roy, Karsten Schönrogge, Hannah Dean, Jodey Peyton, Étienne Branquart, Sonia Vanderhoeven, Gordon H. Copp, Paul Stebbing, Marc Kenis, Wolfgang Rabitsch, Franz Essl, Stefan Schindler, Sarah Brunel, Marianne Kettunen, Leonardo Mazza, Ana Nieto, J. F. Kemp, Piero Genovesi, Riccardo Scalerà, Alan J. A. Stewart
Language: English
Subfield: Nature and Landscape Conservation
Field: Environmental Science
Domain: Physical Sciences
SDG: Life on land
Open Access status: green
Funder: European Commission
OpenAlex ID: W1483498389