FN Archimer Export Format
PT J
TI Variability of amphidromous organism isotopic niches in three Guadeloupe rivers affected by damming and water catchment
BT 
AF Frotté, Lou
   Michel, Loic
   Lepoint, Gilles
   Cordonnier , Sébastien
   Bezault, Étienne
   Monti, Dominique
AS 1:1;2:2;3:3;4:1;5:1;6:1,4;
FF 1:;2:PDG-REM-EEP-LEP;3:;4:;5:;6:;
C1 UMR BOREA, UA.MNHN.SU.IRD.CNRS.UCN, Universite des Antilles, BP 592, 97157 Pointe.a.Pitre, Guadeloupe, France
   Ifremer, Centre de Bretagne, REM/EEP, Laboratoire Environnement profond, Plouzané, France
   Laboratory of Oceanology, MARE Centre, UR FOCUS, University of Liège, 15 allée du six août, B-4000 Liège, Belgium.
   Institut de Systematique, Evolution, Biodiversite (ISYEB), Universite des Antilles, MNHN, CNRS, SU, EPHE, BP 592, 97157 Pointe.a.Pitre, Guadeloupe, France
C2 UNIV ANTILLES, FRANCE
   IFREMER, FRANCE
   UNIV LIEGE, BELGIUM
   UNIV ANTILLES, FRANCE
SI BREST
SE PDG-REM-EEP-LEP
IN WOS Ifremer UPR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 1.059
TC 0
UR https://archimer.ifremer.fr/doc/00703/81514/85945.pdf
LA English
DT Article
DE ;Amphidromous species;stable isotopes;tropical stream;West Indies
AB Native fauna of the tropical volcanic part of Guadeloupe is amphidromous: juveniles born in rivers but that grow in the sea need to migrate upstream to colonise their adult habitat in rivers. This migration is affected by any human-made obstacles placed in their way. Moreover, on volcanic tropical islands, streams are the main source of water catchment for the human population. This deeply affects river hydrology and characteristics. Both damming and water catchment potentially affect community diversity and species demography, but they may also alter the trophic ecology of the river fauna. Using stable isotopes and the stable isotope Bayesian ellipses approach in R (SIBER), this study aimed to assess the isotopic niche variability of riverine fauna of three persistent small rivers of Basse-Terre Island (Guadeloupe) affected by damming and water catchment. Using electrofishing, decapods and fishes (gobies) of three rivers were sampled upstream and downstream of dams. Our results demonstrated that the variability of the isotopic niches was extremely high between rivers but varied less between stations of the same river. Our results revealed complex and river-specific effects and a pattern merged with natural variability. Our two hypotheses (i.e., increase of resources upstream of dams and differential responses of trophic guilds to damming and water catchment) were only weakly supported and never in an unambiguous manner. Our study showed that it is necessary to consider the ‘noise’ generated by natural variability to observe and understand changes in the trophic ecology of associated fauna in relation to damming and water catchment. 
PY 2021
SO Belgian Journal Of Zoology
SN 0777-6276
PU Royal Belgian Institute of Natural Sciences (RBINS)
VL 151
UT 000662895000001
BP 63
EP 80
DI 10.26496/bjz.2021.86
ID 81514
ER

EF