FN Archimer Export Format
PT J
TI Isotopic niches of diadromous fishes inform on interspecific competition in an obstructed catchment
BT 
AF Lizé, Anne
   Teichert, Nils
   Roussel, Jean-Marc
   Acou, Anthony
   Feunteun, Eric
   Carpentier, Alexandre
AS 1:1,2,3;2:1,2;3:4;4:5,6;5:1,2,7;6:1,8;
FF 1:;2:;3:;4:;5:;6:;
C1 UMR 8067 BOREA (MNHN, CNRS, IRD, SU, UCN, UA), Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques, Paris, France
   MNHN, Station Marine de Dinard, CRESCO, Dinard, France
   School of Life Sciences, University of Liverpool, Liverpool, United Kingdom
   UMR DECOD (Ecosystem Dynamics and Sustainability), INRAE, Institut Agro, IFREMER, Rennes, France
   MIAME, Gestion des migrateurs amphihalins dans leur environnement, OFB, INRAE, Institut Agro, Université Pau et Pays de l’Adour, Rennes, France
   Centre d’expertise et données sur le patrimoine naturel, PatriNat OFB-MNHN-CNRS IRD, Station marine de Dinard, Dinard, France
   CGEL (EPHE-PSL), Dinard, France
   Université de Rennes, Rennes, France
C2 MNHN, FRANCE
   MNHN, FRANCE
   UNIV LIVERPOOL, UK
   INRAE, FRANCE
   INST AGRO RENNES-ANGERS, FRANCE
   OFB, FRANCE
   EPHE, FRANCE
   UNIV RENNES, FRANCE
UM DECOD
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3
TC 1
UR https://archimer.ifremer.fr/doc/00863/97478/106403.pdf
   https://archimer.ifremer.fr/doc/00863/97478/106404.zip
LA English
DT Article
DE ;diadromous fishes;stable isotopes;trophic niche;competition;dam;catchment
AB Competition arises when species share a limited resource, but this can be avoided through niche partitioning. Despite the large body of literature on diadromous fishes, very few studies have focused on niche partitioning when competing for resources. Diadromous fishes are suffering a global decline throughout their range in part due to their peculiar life history traits as they migrate from the sea to freshwater to spawn or the reverse. They are particularly sensitive to river fragmentation induced by barriers. Dams for instance are expected to alter the spatial distribution and resource exploitation of diadromous fishes as well as other organisms. Here, we studied the ecological niche of six taxa of diadromous fishes, temporally co-occurring in the same land–sea continuum obstructed by two river dams. We used Bayesian mixing models run on C and N isotopes to infer the various habitats used and the origin of the trophic carbon in muscle and scale tissues of diadromous fishes. Results showed that the sub-adults of Anguilla anguilla, juveniles of Petromyzon marinus, and Salmo trutta exploit mainly the freshwater, or marine part for adults of Lampetra fluviatilis, whereas juveniles of Platichthys flesus and Mugilidae use all the habitats of the land–sea continuum. In the freshwater habitat, the microphytobenthos and biofilm are the main sources of carbon used, while in the marine habitat, the basal carbon sources are more diverse. The analyses of niche overlaps between diadromous fishes demonstrate that the widest isotopic niches, observed for A. anguilla and P. flesus, also have more impact within the community. Results are discussed in terms of intra- and interspecific competition between these diadromous fishes and their generalist/specialist strategies in an obstructed catchment. 
PY 2023
PD NOV
SO Frontiers In Ecology And Evolution
SN 2296-701X
PU Frontiers Media
VL 11
UT 001122458300001
DI 10.3389/fevo.2023.1242452
ID 97478
ER

EF