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The goal of this task was to identify and characterise novel methods for biodiversity monitoring, and to assess their suitability for large scale deployment across Europe. To address this goal we combined extensive literature searches with expert consultation, namely using a survey and through an online workshop. The outcome of our searches is summarised in a metadatabase, which includes 282 methods or method components, which have been classified according to EBV classes addressed, target taxa, and broad method type the method relates to. We then consulted experts within the EuropaBON network and beyond, on the advantages and challenges associated with each of these novel methods, as well as their technology readiness level. In combination, our approaches revealed a wealth of novel methods and a highly active research field, with extensive emerging innovation on several fronts. However, it also revealed high variability in technology readiness, with lack of validation being a prevalent hurdle yet to be overcome for many applications of these methods (i.e. for some taxa and in some environments). Moreover, the opportunities for expansion in observations created by these novel approaches open new challenges associated to the standardisation, integration and storage of biodiversity monitoring data. Finally, the expansion of observations should take a designed approach, in order to deliver on its potential to improve representation and resolution of biodiversity monitoring, and should aim to complement rather than replace human observations.

Financial factors are among the most widely cited bottlenecks around biodiversity monitoring but are relatively poorly studied, compared to monitoring methodologies. The existing body of literature on the cost-effectiveness of monitoring focuses heavily on the hypothetical costs of generating data rather than the practical realities of undertaking and managing monitoring. To address this we used a combination of surveys and semi-structured interviews with 67 biodiversity monitoring managers to provide an in-depth exploration of 1) what are the main rivers of their costs, 2) how different factors affect their cost-effectiveness in generating biodiversity monitoring data, 3) What is the scale and economic value of volunteer labor and 4) what are the main cost bottlenecks and spending priorities. Analysis of these responses demonstrates that monitoring efforts are able to generate more data at a lower cost when they have a) higher numbers of volunteers, b) greater densities of sites and c) monitor a wider range of taxa and habitats. Volunteer labour was worth millions of Euros to these organizations, sometimes more than their total costs. Total budgets and volunteer recruitment and retention were the main cost related bottlenecks among respondents, while staff recruitment was the highest priority for new spending. The results and discussion around them highlight the challenges faced by biodiversity monitoring organizations, particularly in recruiting and retaining qualified staff for the long-term. We produce a series of nine key messages and six recommendations for policy-markers and funders going forward.

In order to assess user and policy needs related to biodiversity monitoring and data, the EuropaBON project invited national experts to fill in this survey in August 2021. The survey was tailored to the national level and aimed at identifying current monitoring efforts, data flows from collection to reporting, data uptake by policymaking, challenges and roadblocks, as well as biodiversity variables and indicators for a desirable future. On behalf of the European Commission (DG Environment) and EuropaBON, the surveys were sent out to all national focal points of the European Environment Information and Observation Network (Eionet) as well as key national agencies. Eionet is a partnership network of the European Environment Agency (EEA) and its 38 member and cooperating countries to gather and develop data, knowledge, and advice to policy makers about Europe's environment. The results of our surveys form the basis for the analysis of the EuropaBON User and Policy Needs Assessment (DOI) and inform the design of the Europa Biodiversity Observation Network and its work programme. We published the original responses of survey sections A and B in the annex of the User and Policy Needs Assessment. Responses of section C were synthesised in the assessment.

In order to assess user and policy needs related to biodiversity monitoring and data, the EuropaBON project invited European experts to fill in this survey in August 2021. The survey was tailored to the European level and aimed at identifying current monitoring efforts, data flows from collection to reporting, data uptake by policymaking, challenges and roadblocks, as well as biodiversity variables and indicators for a desirable future. On behalf of the European Commission (DG Environment) and EuropaBON, the surveys were sent out to key European agencies (e.g., DG ENV, DG AGRI, DG CLIMA, EEA, Eurostat, Biodiversa+). The results of our surveys form the basis for the analysis of the EuropaBON User and Policy Needs Assessment (DOI) and inform the design of the Europa Biodiversity Observation Network and its work programme. We published the original responses of survey sections A and B in the annex of the User and Policy Needs Assessment. Responses of section C were synthesised in the assessment.

The EuropaBON project seeks to design a European Biodiversity Observation Network to monitor the status and trends of European biodiversity and ecosystems in the coming years. To accomplish this, the project has brought together biodiversity monitoring experts and other relevant stakeholders from various sectors (policy, NGO, academia, business, citizen science) from all over Europe. These have agreed on a list of 70 Essential Biodiversity Variables (Deliverable 4.1) that should enable tracking the progress of biodiversity-oriented policy instruments and provide information on changes in biodiversity at different levels.

The co-design of a European Observatory Observation Network requires information on the existing monitoring capacity in Europe, including the quantity and quality of the data available to generate the Essential Biodiversity Variables (EBVs) identified in Task 4.1 at the spatial- and temporal resolutions desired by users and policy. In this document, we provide a framework to identify the main monitoring gaps to produce European-wide EBVs. Specifically, we provide a detailed and spatially explicit information (country-level) on monitoring gaps for the production of 44 EBVs by analyzing the data flowing to current and past monitoring integration initiatives according to the defined criteria (country coverage; taxonomic/ecosystem coverage; standardized monitoring; time-series data; long-term monitoring; ongoing monitoring; sampling frequency; spatial coverage density; minimum sampling unit; raw data available). Results are presented in factsheets for each EBV and summarized across EBV classes and realms.

EuropaBON harnesses the power of modelling Essential Biodiversity Variables (EBVs) to integrate different reporting streams, data sources, and monitoring schemes, and measure biodiversity change across multiple dimensions in space and time. Therefore, EBVs are at the core of the project and form the basis for several of the tasks feeding into the co-design of a biodiversity monitoring system for Europe. In this document, we describe the stepwise process of identifying and specifying the EBVs in the EBV list presented in this deliverable. We further provide a summary of the characteristics of the EBVs identified for EuropaBON, in terms of their desired spatial- and temporal resolutions, as well as the taxonomic/ ecosystem scope to be measured.