Event Abstract Back to Event Characterisation of the lonely Zostera marina meadows in North Africa and a deep one of the Mediterranean (south to the strait of Gibraltar, Morocco) Loubna Boutahar1*, Free Espinosa Torre2, Yassine R. Sghaier3, Atef Ouerghi3, Mohamed MAANAN4, Jonathan Richir5, Sylvie Gobert5, Gilles Lepoint5 and Hocein Bazairi1 1 Mohammed V University, Morocco 2 University of Seville, Spain 3 Regional Activity Centre for Specially Protected Areas (RAC/SPA), Tunisia 4 Université de Nantes, France 5 University of Liège, Belgium Zostera marina ecosystems are key components of the marine environment. The dramatic widespread loss of this vascular plant has been well documented and may be due to natural processes and/or anthropogenic disturbances and stress. The only Z. marina meadows which still exist in the Moroccan coast are those of Oued El Marsa and Belyounech bays in the site of ‘Jbel Moussa’ (southern the Strait of Gibraltar). The present study aimed to provide baseline quantitative data on these two deep eelgrass meadows of the Mediterranean (lower limit at -17 m in depth). The Belyounech meadow has a wide continuous distribution whereas that of Oued El Marsa is very fragmented. Shoot density and aboveground biomass were consequently higher in Belyounech bay. Seagrass cover (%) showed significant differences only between the border and the central parts while it remained comparable between both sites. The percentage cover of Caulerpa cylindracea algae was higher throughout the margins parts and especially in Ouad El Marsa bay where the meadow is fragmented. Roots serve as the main bioaccumulator organ of 28 chemical elements with low transition to rhizomes and leaves. %C and %N were both higher in leaves comparing to belowground parts. The results obtained were compared to other regions in the Mediterranean to assess the quality and the health of the deep eelgrass meadows of Jbel Moussa. Keywords: Zostera marina,, Moroccan Mediterranean coast, seagrass characterisation, bioaccumulation, elementary content, conservation Conference: XX Iberian Symposium on Marine Biology Studies (SIEBM XX) , Braga, Portugal, 9 Sep - 12 Sep, 2019. Presentation Type: Poster Presentation Topic: Ecology, Biodiversity and Vulnerable Ecosystems Citation: Boutahar L, Espinosa Torre F, Sghaier YR, Ouerghi A, MAANAN M, Richir J, Gobert S, Lepoint G and Bazairi H (2019). Characterisation of the lonely Zostera marina meadows in North Africa and a deep one of the Mediterranean (south to the strait of Gibraltar, Morocco). Front. Mar. Sci. Conference Abstract: XX Iberian Symposium on Marine Biology Studies (SIEBM XX) . doi: 10.3389/conf.fmars.2019.08.00089 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 14 Sep 2019; Published Online: 27 Sep 2019. * Correspondence: PhD. Loubna Boutahar, Mohammed V University, Rabat, Morocco, boutaharloubna@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Loubna Boutahar Free Espinosa Torre Yassine R Sghaier Atef Ouerghi Mohamed MAANAN Jonathan Richir Sylvie Gobert Gilles Lepoint Hocein Bazairi Google Loubna Boutahar Free Espinosa Torre Yassine R Sghaier Atef Ouerghi Mohamed MAANAN Jonathan Richir Sylvie Gobert Gilles Lepoint Hocein Bazairi Google Scholar Loubna Boutahar Free Espinosa Torre Yassine R Sghaier Atef Ouerghi Mohamed MAANAN Jonathan Richir Sylvie Gobert Gilles Lepoint Hocein Bazairi PubMed Loubna Boutahar Free Espinosa Torre Yassine R Sghaier Atef Ouerghi Mohamed MAANAN Jonathan Richir Sylvie Gobert Gilles Lepoint Hocein Bazairi Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.