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Linking basin-scale connectivity, oceanography and population dynamics for the conservation and management of marine ecosystems ArchiMer
Dubois, Melodie; Rossi, Vincent; Ser-giacomi, Enrico; Arnaud-haond, Sophie; Lopez, Cristobal; Hernandez-garcia, Emilio.
Aim Assessing the spatial structure and dynamics of marine populations is still a major challenge in ecology. The need to manage marine resources from ecosystem and large-scale perspectives is recognized, but our partial understanding of oceanic connectivity limits the implementation of globally pertinent conservation planning. Based on a biophysical model for the entire Mediterranean Sea, this study takes an ecosystem approach to connectivity and provides a systematic characterization of broad-scale larval dispersal patterns. It builds on our knowledge of population dynamics and discusses the ecological and management implications. Location The semi-enclosed Mediterranean Sea and its marine ecosystems are used as a case study to investigate broad-scale...
Tipo: Text Palavras-chave: Larval dispersal; Local retention; Marine connectivity; Marine ecosystems; Marine protected areas; Mediterranean Sea; Population dynamics; Population genetics; Self-recruitment; Source; Sink dynamics.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00311/42201/41534.pdf
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Comparison between Eulerian diagnostics and finite-size Lyapunov exponents computed from altimetry in the Algerian basin ArchiMer
D'Ovidio, Francesco; Isern-fontanet, Jordi; Lopez, Cristobal; Hernandez Garcia, Emilio; Garcia Ladona, Emilio.
Transport and mixing properties of surface currents can be detected from altimetric data by both Eulerian and Lagrangian diagnostics. In contrast with Eulerian diagnostics, Lagrangian tools like the local Lyapunov exponents have the advantage of exploiting both spatial and temporal variability of the velocity field and are in principle able to unveil subgrid filaments generated by chaotic stirring. However, one may wonder whether this theoretical advantage is of practical interest in real-data, mesoscale and sub-mesoscale analysis, because of the uncertainties and resolution of altimetric products, and the non-passive nature of biogeochemical tracers. Here we compare the ability of standard Eulerian diagnostics and the finite-size Lyapunov exponent in...
Tipo: Text Palavras-chave: Lagrangian dynamics; Mediterranean circulation; Altimetry; Filaments; Sub mesoscale.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6136.pdf
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