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Towards a framework for assessment and management of cumulative human impacts on marine food webs Giakoumi, S.; Halpern, B.; Michel, L.N.; Gobert, S.; Sini, M.; Boudouresque, C.; Gambi, M.; Katsanevakis, S.; Lejeune, P.; Montefalcone, M.; Pergent, G.; Pergent-Martini, C.; Sanchez-Jerez, P.; Velimirov, B.; Vizzini, S.; Abadie, A.; Coll, M.; Guidetti, P.; Micheli, F.; Possingham, H. (2015). Towards a framework for assessment and management of cumulative human impacts on marine food webs. Conserv. Biol. 29(4): 1228-1234. https://dx.doi.org/10.1111/cobi.12468 In: Conservation Biology. Wiley: Boston, Mass.. ISSN 0888-8892; e-ISSN 1523-1739

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Beschikbaar in	Auteurs
VLIZ: Non-open access 346490 [ aanvragen ]

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Trefwoord

Marien/Kust

Author keywords

conservation actions; ecosystem-based management; expert knowledgeelicitation; multiple threats; seagrass; vulnerability; acciones deconservacion; amenazas multiples; manejo con base en los ecosistemas;obtencion de conocimiento de expertos; pastos marinos; vulnerabilidad

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Auteurs		Top
Giakoumi, S. Halpern, B. Michel, L.N. Gobert, S. Sini, M. Boudouresque, C. Gambi, M.	Katsanevakis, S. Lejeune, P. Montefalcone, M. Pergent, G. Pergent-Martini, C. Sanchez-Jerez, P. Velimirov, B.	Vizzini, S. Abadie, A. Coll, M. Guidetti, P. Micheli, F. Possingham, H.

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Abstract

Effective ecosystem-based management requires understanding ecosystem responses to multiple human threats, rather than focusing on single threats. To understand ecosystem responses to anthropogenic threats holistically, it is necessary to know how threats affect different components within ecosystems and ultimately alter ecosystem functioning. We used a case study of a Mediterranean seagrass (Posidonia oceanica) food web and expert knowledge elicitation in an application of the initial steps of a framework for assessment of cumulative human impacts on food webs. We produced a conceptual seagrass food web model, determined the main trophic relationships, identified the main threats to the food web components, and assessed the components' vulnerability to those threats. Some threats had high (e.g., coastal infrastructure) or low impacts (e.g., agricultural runoff) on all food web components, whereas others (e.g., introduced carnivores) had very different impacts on each component. Partitioning the ecosystem into its components enabled us to identify threats previously overlooked and to reevaluate the importance of threats commonly perceived as major. By incorporating this understanding of system vulnerability with data on changes in the state of each threat (e.g., decreasing domestic pollution and increasing fishing) into a food web model, managers may be better able to estimate and predict cumulative human impacts on ecosystems and to prioritize conservation actions.

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