Article (Scientific journals)
Variability of amphidromous organism isotopic niches in three Guadeloupe rivers affected by damming and water catchment
Frotté, Lou; Michel, Loïc; Lepoint, Gilles et al.
2021In Belgian Journal of Zoology, 151 (1)
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The Belgian Journal of Zoology is a diamond open access journal publishing high-quality research papers in English that are original, of broad interest and hypothesis-driven. Manuscripts on all aspects of zoology are considered, including anatomy, behaviour, developmental biology, ecology, evolution, genetics, genomics and physiology. Manuscripts on veterinary topics are outside of the journal’s scope. The Belgian Journal of Zoology also welcomes reviews, especially from complex or poorly understood research fields in zoology. The Belgian Journal of Zoology does no longer publish purely taxonomic papers. Surveys and reports on novel or invasive animal species for Belgium are considered only if sufficient new biological or biogeographic information is included. All published papers and short notes in the Belgian Journal of Zoology are made available through this journal website. All manuscripts (including short notes) are peer reviewed by at least two referees and should be sent electronically to the editorial office at bjz@naturalsciences.be. Please always check the Author Guidelines before submitting. The Belgian Journal of Zoology is published online only from 2017 onwards in one volume with 2 issues. A print-on-demand version can be purchased from the editorial office.


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Keywords :
freshwater decapods; stable isotopes; damming; diadromous; lesser antilles
Abstract :
[en] 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.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Zoology
Environmental sciences & ecology
Aquatic sciences & oceanology
Author, co-author :
Frotté, Lou;  Université des Antilles
Michel, Loïc  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Cordonnier, Sébastien;  Université des Antilles
Bezault, Etienne;  Université des Antilles
Monti, Dominique;  Université des Antilles
Language :
English
Title :
Variability of amphidromous organism isotopic niches in three Guadeloupe rivers affected by damming and water catchment
Publication date :
09 June 2021
Journal title :
Belgian Journal of Zoology
ISSN :
0777-6276
eISSN :
2295-0451
Publisher :
Koninklijke Belgische Vereniging voor Dierkunde, Belgium
Volume :
151
Issue :
1
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Réponses démographique et adaptative aux perturbations de continuité écologique chez les espèces amphidromes (Gobiidae et Palaemonidae) (2016-05/projet227).
Funders :
French Biodiversity Office [FR]
Available on ORBi :
since 09 June 2021

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