TY - JOUR T1 - Plasticity of trophic interactions in fish assemblages results in temporal stability of benthic-pelagic couplings A1 - Timmerman,Charles-Andre A1 - Giraldo,Carolina A1 - Cresson,Pierre A1 - Ernande,Bruno A1 - Travers-Trolet,Morgane A1 - Rouquette,Manuel A1 - Denamiel,Margaux A1 - Lefebvre,Sebastien AD - Ifremer, HMMN, Centre Manche - Mer du Nord, BP 669, F-62 321, Boulogne-sur-Mer, France AD - MARBEC, Univ. Montpellier, IFREMER, CNRS, IRD, F-34 090, Montpellier, France AD - IIASA, Evolution and Ecology Program, Schloßplatz 1, A-2361, Laxenburg, Austria AD - Ifremer, EMH, Centre Atlantique, BP 21105, F-44 300, Nantes, France AD - Ifremer, LERBN, Station Ifremer de Dinard, BP 70134, F-35 801, Dinard, France AD - Univ. Lille, CNRS, Univ. Littoral Côte d’Opale, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, station marine de Wimereux, F-59000, Lille, France UR - https://doi.org/10.1016/j.marenvres.2021.105412 DO - 10.1016/j.marenvres.2021.105412 KW - Food webs KW - Stable isotopes KW - Biomass KW - Isotopic functional indices KW - Flux N2 - This study addresses the temporal variability of couplings between pelagic and benthic habitats for fish assemblages at five periods in a shallow epicontinental sea, the Eastern English Channel (EEC). Organic matter fluxes fueling fish assemblages and the relative contribution of their different sources were assessed using stable isotope analysis and associated isotopic functional metrics. Couplings between benthic and pelagic realms appeared to be a permanent feature in the EEC, potentially favored by shallow depth and driven by the combination of two trophic processes. First, trophic interactions exhibited plasticity and revealed resource partitioning. Second, changes in the composition of fish assemblages did not impact benthic-pelagic couplings, as most dominant species were generalists during at least one time period, allowing complete use of available resources. Examining both unweighted and biomass-weighted indices was complementary and permitted a better understanding of trophic interactions and energy fluxes. Y1 - 2021/08 PB - Elsevier BV JF - Marine Environmental Research SN - 0141-1136 VL - 170 ID - 81730 ER -