The same but different: stable isotopes reveal two distinguishable, yet similar, neighbouring food chains in a coral reef - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the Marine Biological Association of the UK Année : 2018

The same but different: stable isotopes reveal two distinguishable, yet similar, neighbouring food chains in a coral reef

Baptiste Lebourg
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Yves Letourneur
Daniela Bănaru
Jean Blanchot
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  • PersonId : 957953
Cristele Chevalier
Benoit Lebreton
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M. Pagano
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  • IdHAL : marc-pagano

Résumé

Stable isotope compositions were studied in particulate organic matter (POM), zooplankton and different trophic groups of teleosts to compare food chains based on plankton at two sites (lagoon and outer slope) in a New Caledonian coral reef. For each trophic compartment, d 13 C values were always lower in the outer slope than in the lagoon. This result may be explained by potential differences in POM composition between the two environments, suggesting that the two food chains are based on different primary sources of carbon. In contrast, d 15 N values did not vary between the lagoon and the outer slope, indicating that these two food chains presented similar length and trophic levels, despite being distinguishable.
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Dates et versions

hal-02015534 , version 1 (12-02-2019)

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Baptiste Lebourg, Yves Letourneur, Daniela Bănaru, Jean Blanchot, Cristele Chevalier, et al.. The same but different: stable isotopes reveal two distinguishable, yet similar, neighbouring food chains in a coral reef. Journal of the Marine Biological Association of the UK, 2018, 98 (7), pp.1589-1597. ⟨10.1017/S0025315417001370⟩. ⟨hal-02015534⟩
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