University of the Aegean – Department of Marine Sciences CIMPAL: a new index for the mapping of cumulative impacts of invasive alien species on marine habitats Stelios Katsanevakis, Fernando Tempera, Heliana Teixeira 1

University of the Aegean – Department of Marine Sciences 2 Policy makers: “Scientists will give us anything except an answer”

University of the Aegean – Department of Marine Sciences 3 grid cell Developing a cumulative impact index  A i :status of invasive alien species (IAS) i  H j :index of the extent of habitat j  w i,j :impact weight for IAS i and habitat j  n:number of invasive alien species  m: number of marine habitats [0, 1]

University of the Aegean – Department of Marine Sciences 4 w ij : impact weights for species i and habitat j Impact MinimalMinorModerateMajorMassive Strength of Evidence Robust Medium Low 00012

University of the Aegean – Department of Marine Sciences 5 w ij : impact weights for species i and habitat j Impact MinimalMinorModerateMajorMassive Strength of Evidence Robust Medium Low no or negligible individual fitness population level community level reversible community level irreversible

University of the Aegean – Department of Marine Sciences 6 w ij : impact weights for species i and habitat j Impact MinimalMinorModerateMajorMassive Strength of Evidence Robust Medium Low no or negligible individual fitness population level community level reversible community level irreversible experiments modelling observations correlations ex. judgement

University of the Aegean – Department of Marine Sciences 7 w ij : impact weights for species i and habitat j Impact MinimalMinorModerateMajorMassive Strength of Evidence Robust Medium Low any other way of deciding on weights can be used!

University of the Aegean – Department of Marine Sciences 8 Katsanevakis et al Invading European Seas: assessing pathways of introduction of marine aliens. Ocean & Coastal Management 76: 64–74. EASIN (European Alien Species Information Network) - Distribution and pathways of marine aliens grid cell 10 km

University of the Aegean – Department of Marine Sciences 9 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014)

University of the Aegean – Department of Marine Sciences 10 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Giakoumi et al Ecoregion-based conservation planning in the Mediterranean: dealing with large-scale heterogeneity. PLoS ONE 8(10): e grid cell 10 km

University of the Aegean – Department of Marine Sciences 11 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Giakoumi et al Ecoregion-based conservation planning in the Mediterranean: dealing with large-scale heterogeneity. PLoS ONE 8(10): e grid cell 10 km

University of the Aegean – Department of Marine Sciences 12 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Katsanevakis et al Impacts of marine invasive alien species on ecosystem services and biodiversity: a pan-European review. Aquatic Invasions 9(4): 391–423.

University of the Aegean – Department of Marine Sciences 13 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Katsanevakis et al Impacts of marine invasive alien species on ecosystem services and biodiversity: a pan-European review. Aquatic Invasions 9(4): 391–423.

University of the Aegean – Department of Marine Sciences 14 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Katsanevakis et al Impacts of marine invasive alien species on ecosystem services and biodiversity: a pan-European review. Aquatic Invasions 9(4): 391–423. Review of all reported invasive alien species in Europe DAISIE ‘100 of the worst’ list NOBANIS factsheets SEBI ‘List of worst invasive alien species’ CABI’s Invasive Species Compendium + literature, expert opinion of the authors

University of the Aegean – Department of Marine Sciences 15 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Katsanevakis et al Impacts of marine invasive alien species on ecosystem services and biodiversity: a pan-European review. Aquatic Invasions 9(4): 391–423. Bibliographic search Using keywords  >20,000 articles After first screening  >2,500 articles In the end  329 articles that reported impacts

University of the Aegean – Department of Marine Sciences 16 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) Katsanevakis et al Impacts of marine invasive alien species on ecosystem services and biodiversity: a pan-European review. Aquatic Invasions 9(4): 391–423.

University of the Aegean – Department of Marine Sciences 17 Application in the Mediterranean  13 habitats  60 invasive alien species (Katsanevakis et al. 2014) EASIN – European Alien Species Information Network - Distribution of Caulerpa cylindracea

University of the Aegean – Department of Marine Sciences 18 Cumulative impact score: 13 habitats, 60 invasive aliens

University of the Aegean – Department of Marine Sciences 19 Disaggregation by pathway: shipping

University of the Aegean – Department of Marine Sciences 20 Disaggregation by pathway: aquaculture

University of the Aegean – Department of Marine Sciences 21 Disaggregation by pathway: Suez canal

University of the Aegean – Department of Marine Sciences 22 Disaggregation by habitat: coralligenous communities

University of the Aegean – Department of Marine Sciences 23 Mediterranean: Ranking species by impact

University of the Aegean – Department of Marine Sciences 24 Mediterranean: Ranking species by impact

University of the Aegean – Department of Marine Sciences 25 Possible improvements  account for interactions  better habitat maps  abundance or coverage instead of presence/absence  improved impact assessments

University of the Aegean – Department of Marine Sciences CIMPAL: a new index for the mapping of cumulative impacts of invasive alien species on marine habitats Stelios Katsanevakis, Fernando Tempera, Heliana Teixeira 26