FN Archimer Export Format PT J TI Inferences to estimate consumer’s diet using stable isotopes: Insights from a dynamic mixing model BT AF Ballutaud, Marine Travers-Trolet, Morgane Marchal, Paul Dubois, Stanislas Giraldo, Carolina Parnell, Andrew C. Nuche-Pascual, M. Teresa Lefebvre, Sebastien AS 1:1;2:2;3:3;4:4;5:3;6:5;7:1;8:1; FF 1:;2:PDG-RBE-HALGO-EMH;3:PDG-RBE-HMMN-LRHBL;4:PDG-ODE-DYNECO-LEBCO;5:PDG-RBE-HMMN-LRHBL;6:;7:;8:; C1 Univ. Lille, Univ. Littoral Côte d’Opale, CNRS, IRD, UMR 8187 Laboratoire d’Océanologie et de Géosciences, Lille, France EMH, Centre Atlantique, Ifremer, Nantes, France Channel and North Sea Fisheries Research Unit, Ifremer, Boulogne-sur-Mer, France Laboratory of Coastal Benthic Ecology, DYNECO, Ifremer, Plouzané, France Hamilton Institute, Insight Centre for Data Analytics, Maynooth University, Maynooth, Ireland C2 UNIV LILLE, FRANCE IFREMER, FRANCE IFREMER, FRANCE IFREMER, FRANCE UNIV MAYNOOTH, IRELAND SI NANTES BOULOGNE BREST SE PDG-RBE-HALGO-EMH PDG-RBE-HMMN-LRHBL PDG-ODE-DYNECO-LEBCO UM DECOD IN WOS Ifremer UPR WOS Ifremer UMR DOAJ copubli-france copubli-europe copubli-univ-france IF 3.7 TC 5 UR https://archimer.ifremer.fr/doc/00750/86215/91500.pdf https://archimer.ifremer.fr/doc/00750/86215/91501.pdf https://archimer.ifremer.fr/doc/00750/86215/91502.pdf https://archimer.ifremer.fr/doc/00750/86215/91503.pdf LA English DT Article AB Stable isotope ratios are used to reconstruct animal diet in trophic ecology via mixing models. Several assumptions of stable isotope mixing models are critical, i.e., constant trophic discrimination factor and isotopic equilibrium between the consumer and its diet. The isotopic turnover rate (λ and its counterpart the half-life) affects the dynamics of isotopic incorporation for an organism and the isotopic equilibrium assumption: λ involves a time lag between the real assimilated diet and the diet estimated by mixing models at the individual scale. Current stable isotope mixing model studies consider neither this time lag nor even the dynamics of isotopic ratios in general. We developed a mechanistic framework using a dynamic mixing model (DMM) to assess the contribution of λ to the dynamics of isotopic incorporation and to estimate the bias induced by neglecting the time lag in diet reconstruction in conventional static mixing models (SMMs). The DMM includes isotope dynamics of sources (denoted δs), λ and frequency of diet-switch (ω). The results showed a significant bias generated by the SMM compared to the DMM (up to 50% of differences). This bias can be strongly reduced in SMMs by averaging the isotopic variations of the food sources over a time window equal to twice the isotopic half-life. However, the bias will persist (∼15%) for intermediate values of the ω/λ ratio. The inferences generated using a case study highlighted that DMM enhanced estimates of consumer’s diet, and this could avoid misinterpretation in ecosystem functioning, food-web structure analysis and underlying biological processes. PY 2022 PD FEB SO Plos One SN 1932-6203 PU Public Library of Science (PLoS) VL 17 IS 2 UT 000805530700031 DI 10.1371/journal.pone.0263454 ID 86215 ER EF