Fish food-web structure of a southern Mediterranean lagoon (El Mellah Lagoon, Algeria): what we can learn from stable isotope analysis
| Autor: | JEREMY DENIS, RYM BOUAZIZ, BRAHIM DRAREDJA, JEAN MARIE MUNARON, ABDELLAH BORHANE DJEBAR, RACHID AMARA, FRANÇOIS LE LOC’H, FRIDA BEN RAIS LASRAM |
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| Přispěvatelé: | Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Nord]), Université Badji Mokhtar Annaba (UBMA), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), Université du Littoral Côte d'Opale (ULCO) |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Environmental Engineering
stable isotopes Trophic position Aquatic Science niche overlap Niche overlap Oceanography trophic position Mediterranean Marine Science trophic position Isotopic niches δ13C [SDE.BE]Environmental Sciences/Biodiversity and Ecology Ichthyofauna Benthic and pelagic invertebrates Food sources Ecology Evolution Behavior and Systematics δ15N |
| Zdroj: | Mediterranean Marine Science; Τόμ. 24 Αρ. 2 (2023): VOL 24, No 2 (2023); 211-228 Mediterranean Marine Science; Vol. 24 No. 2 (2023): VOL 24, No 2 (2023); 211-228 Mediterranean Marine Science Mediterranean Marine Science, 2023, 24 (2), pp.211-228. ⟨10.12681/mms.30180⟩ Mediterranean Marine Science (1108-393X) (Hellenic Centre for Marine Research), 2023, Vol. 24, N. 2, P. 211-228 |
| ISSN: | 1108-393X 1791-6763 |
| DOI: | 10.12681/mms.30180⟩ |
| Popis: | The structure of a fish food-web was described for the first time in a coastal lagoon in the southern Mediterranean Sea by analysing stable carbon and nitrogen isotopes of fish species and their potential food sources. The El Mellah Lagoon (EML) located in extreme north-eastern Algeria, is the only coastal lagoon in the southern Mediterranean with low human pressure due to few human activities and its protected status under the Ramsar Convention. We investigated the structure of the fish food-web in the spring at four stations in the lagoon that differed in their proximity to rivers and the channel, which connects to the sea. The results provided insight into ecological functions of EML as a feeding area for all fish species caught in the lagoon, in particular marine migrant juveniles and resident species. The δ13C results highlighted the importance of marine organic matter on the functioning of the EML fish food-web, to which organic matter in marine sediments and likely microphytobenthos contribute most. Our study also revealed the importance of seagrass (Ruppia sp.) for detritivorous fish (i.e., Mugilidae species) and for their potential to shelter a wide variety of benthic invertebrates that are potential food sources for benthivorous fish. Our study revealed the small influence of freshwater inputs on the functioning of the EML food-web and that juvenile marine fish may use the lagoon for reasons other than feeding, most likely to avoid predation and obtain physiological advantages. |
| Databáze: | OpenAIRE |
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