Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems

Cresson, Pierre; Chouvelon, Tiphaine; Bustamante, Paco; Bănaru, Daniela; Baudrier, Jérôme; Loc’h, François Le; Mauffret, A.; Benoit, Mialet; Spitz, Jérôme; Wessel, Nathalie; Briand, Marine J.; Denamiel, Margaux; Doray, Mathieu; Guillou, Gaël; Jadaud, Angélique; Lazard, Coline; Prieur, Solène; Rouquette, Manuel; Saraux, Claire; Serre, Sandrine; Timmerman, Charles-André; Vérin, Yves; Harmelin-Vivien, Mireille

doi:10.1016/j.pocean.2020.102343

Cited by 41 publications

(36 citation statements)

References 105 publications

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“…The large abundance of Clupeidae in large whiting stomachs reflects that the winter spawning migration of these species in the EEC represents an important trophic opportunity for whiting during a nutrient-poor period. Previous studies reported a particularly high energetic value for these species [ 63 , 76 ]. Energy content analyzes performed on 78 species taken from the northeast Atlantic Ocean thus revealed that C .…”

Section: Discussionmentioning

confidence: 99%

Seasonal and ontogenetic variation of whiting diet in the Eastern English Channel and the Southern North Sea

et al. 2020

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An accurate description of trophic interactions is crucial to understand ecosystem functioning and sustainably manage marine ecosystems exploitation. Carbon and nitrogen stable isotopes were coupled with stomach content analyses to investigate whiting (Merlangius merlangus, Linnaeus, 1758) feeding behavior in the Eastern English Channel and Southern North Sea. Whiting juveniles and adults were sampled in autumn and winter to investigate both ontogenetic and seasonal changes. In addition, queen scallops (Aequipecten opercularis) samples were collected along with fish to be used as isotopic benthic baseline. Results indicated an ontogenetic diet change from crustaceans to fish and cephalopods. In autumn, δ 15 N values generally increased with fish size while in winter, a decrease of δ 15 N values with fish size was observed, as a potential result of spatial variation in baseline δ 15 N values. In winter, a nutrient-poor period, an increase in feeding intensity was observed, especially on the copepod Temora longicornis. This study provides further insights into whiting trophic ecology in relation to ontogenetic and seasonal variations, and it confirms the importance of combining several trophic analysis methods to understand ecosystem functioning.

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Section: Discussionmentioning

confidence: 99%

Seasonal and ontogenetic variation of whiting diet in the Eastern English Channel and the Southern North Sea

et al. 2020

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“…Isotopic difference between the species may support this assumption. Less negative δ 13 C value is commonly interpreted as a higher dependency on benthic-derived organic matter (Carlier et al, 2007;Cresson et al, 2020;Duffill Telsnig et al, 2019;Kopp et al, 2015;Le Loc'h et al, 2008). Isotopic ratios measured for sole can thus track the dependency of this species on the organic matter from the soft bottom sediment, potentially processed by the microbial pathway.…”

Section: Influence Of Diet and Feeding Habitat On Hg Species Concentr...mentioning

confidence: 99%

Distribution of mercury species in different tissues and trophic levels of commonly consumed fish species from the south Bay of Biscay (France)

Mille

Bisch

Caill-Milly

et al. 2021

Marine Pollution Bulletin

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“…Compared with prior knowledge, EcoDiet revealed higher contributions of benthic and invertebrate compartments to the diet of most species, resulting in lower TLs for many predators and lower importance of the pelagic pathways in biomass flows. This suggests that the overall functioning of the Celtic Sea may be closer to that of the neighboring English Channel than that of the pelagic‐dominated Bay of Biscay (Cresson et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

EcoDiet: A hierarchical Bayesian model to combine stomach, biotracer, and literature data into diet matrix estimation

Hernvann

Gascuel

Kopp

et al. 2022

Ecological Applications

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Although quantifying trophic interactions is a critical path to understanding and forecasting ecosystem functioning, fitting trophic models to field data remains challenging. It requires flexible statistical tools to combine different sources of information from the literature and fieldwork samples. We present EcoDiet, a hierarchical Bayesian modeling framework to simultaneously estimate food‐web topology and diet composition of all consumers in the food web, by combining (1) a priori knowledge from the literature on both food‐web topology and diet proportions; (2) stomach content analyses, with frequencies of prey occurrence used as the primary source of data to update the prior knowledge on the topological food‐web structure; (3) and biotracers data through a mixing model (MM). Inferences are derived in a Bayesian probabilistic rationale that provides a formal way to incorporate prior information and quantifies uncertainty around both the topological structure of the food web and the dietary proportions. EcoDiet was implemented as an open‐source R package, providing a user‐friendly interface to execute the model, as well as examples and guidelines to familiarize with its use. We used simulated data to demonstrate the benefits of EcoDiet and how the framework can improve inferences on diet matrix by comparison with classical network MM. We applied EcoDiet to the Celtic Sea ecosystem, and showed how combining multiple data types within an integrated approach provides a more robust and holistic picture of the food‐web topology and diet matrices than the literature or classical MM approach alone. EcoDiet has the potential to become a reference method for building diet matrices as a preliminary step of ecosystem modeling and to improve our understanding of prey–predator interactions.

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Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems

Cited by 41 publications

References 105 publications

Seasonal and ontogenetic variation of whiting diet in the Eastern English Channel and the Southern North Sea

Seasonal and ontogenetic variation of whiting diet in the Eastern English Channel and the Southern North Sea

Distribution of mercury species in different tissues and trophic levels of commonly consumed fish species from the south Bay of Biscay (France)

EcoDiet: A hierarchical Bayesian model to combine stomach, biotracer, and literature data into diet matrix estimation

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