February 1st to 5th 2016
Olhão, Portugal
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Linking environmental, climatic and human-induced impacts on a Mediterranean semi-enclosed embayment (Amvrakikos Gulf, Greece): a food-web modelling approach

Scientific Exhibition
Biodiversity Effects
Thursday, February 4, 2016 -
17:30 to 19:30

Moutopoulos, D.K. 1 Libralato, S. 2 Piroddi, C. 3 Gonzalvod, J. 4

1Department of Fisheries-Aquaculture Technology, Technological Education Institute of Western Greece, Mesolonghi, Greece
2Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Oceanography Division
3Institute of Marine Science, Spanish Research Council, Passeig Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
4Tethys Research Institute, Viale G. B. Gadio 2, 20121 Milan, Italy

Understanding the functioning and the response of food webs to multiple stressors is essential for defining their good ecological status (GES), particularly in the context of the Marine Strategy Framework Directive (MSFD). Ecosystem modelling tools have been increasingly used worldwide because they can assess the dynamics and interactions between different levels of biological organization (either species or functional groups), the main drivers and stressors and provide indicators useful for conservation and management issues. In this respect, we developed a food web model to assess and quantify the health status of a semi-enclosed embayment, Amvrakikos Gulf, the only in the Mediterranean Sea that is characterized by a fjord-like oceanographic regime. The first aim of the study was to investigate dynamics of marine resources over the last three decades considering the effects of rivers runoff, climatic induced changes, development of fish and shellfish farming and modernization of fisheries as the major drivers impacting the system. Moreover, the second aim was to assess biodiversity, structural and functional ecosystem changes through time using indicators derived from temporal simulations. Here, we will present results obtained from simulations tuned for the period during 1980-2013 showing a selected set of model derived indicators from diversity to network analysis and fisheries related indicators. Overall the approach is for supporting the planning and implementation of the MSFD, which requires the assessment of all European marine ecosystems and pressures associated, as well as the establishment of environmental targets (e.g., indicators) to achieve "Good Environmental Status" by 2020.
keywords: 
food web model, fisheries-climatic interaction, human activities, Amvrakikos gulf, Mediterranean Sea

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