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Trends in Biodiversity: Impacts, Catch Data, and Survey Trends

This review explores the impacts on biodiversity and trends in catch and survey data. It assesses options for evaluating invertebrates biodiversity, identifies indicators, and discusses the spatial scale and case studies. Deliverables include relevance of catch data, biodiversity indicators, and patterns of distributions from surveys. Links with the Marine Strategy Framework Directive (MSFD) are examined, particularly the descriptors related to biological diversity, sea-floor integrity, and marine litter.

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Trends in Biodiversity: Impacts, Catch Data, and Survey Trends

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  1. WP6 trends in biodiversity • - Review impacts • Explore trends in catch data • Explore trends in survey data • Options for assessing trends in invertebrates • Identification of indicators

  2. WP6 contributors/objectives Participants Objectives • - review impacts • explore trends (landings/catch/surveys) • options for invertebrates biodiversity • selection of biodiversity indicators • spatial scale: Case study + Case studies

  3. WP6 deliverables • D6.1 Relevance of commercial catch data (18) • D6.2 Biodiversity indicators: trends, monitoring evaluation of information (24) • D6.3 Patterns of distributions from survey (from some CSs)

  4. Links with MarineStrategy Framework Directive (MSFD) • Descriptors of MSFD: • 1 - Biological diversity is maintained. [...] quality and occurrence of habitats [...] distribution and abundance of species are in line with [...] geographic and climatic conditions • 4 - Marine food web [...] normal abundance and diversity [...] • 6 - Sea-floor integrity [...] structure and functions [...] safeguarded [...] benthic ecosystems [...] not adversely affected • 10 - [...] marine litter do not cause harm

  5. Example: descriptor marine litter • 10 - [...] marine litter do not cause harm

  6. MSFD descriptors addresed in WP6 • 1: biological diversity (species diversity metrics) • 4: food web, not addressed (*) • 6: sea floor: can be addressed with VMS (availability?) • proportion of the seafloor impacted? • use of EU-CoralFISH results • 10: marine litter: no data. • Define protocol for on-board observations in the long term monitoring strategy ? • part of task 7.3: Prototype short- and long-term management and monitoring framework for deep-water fisheries and stocks in the NE Atlantic (*) preys mainly mesopelagic with little data

  7. List of indicators • Taxonomic distinctness, other diversity metrics from surveys • Simple indicators (landings/catch/survey): • S (richness) • proportion of large species, small species, chondrichthyans , vulnerable species (e.g. from observer data), etc • Discard rate • Number of discarded species • Invertebrates: • Is it a matter of monitoring diversity or conservation of VMEs ? • Relevant spatial scale • Footprint approach: distribution of fishing effort frozen to current (VMS) ? Catch: on-board observations

  8. Links with other WPs • WP5: BRPs and HCRs • Fish diversity and invertebrates in HCRs • Include in HCRs ? • Use as constraint to choose HCRs with lesser diversity impact ? • .... • WP7: Managements strategies • If footprint approach for invertebrates/VMEs, how to integrate in management strategies ? • How to account for fish species diversity in MS ? • ...

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