Sources de matière organique

Table des matières

Remerciements
AVANT-PROPOS
Contribution des auteurs
RESUME
TABLE DES MATIÈRES
LISTE DES TABLEAUX
LISTE DES FIGURES
INTRODUCTION GÉNÉRALE
Macroinvertébrés benthiques
Sources de matière organique
Couplages en milieu lacustre
Hétérogénéité au sein des systèmes lacustres
Approche de l’analyse en isotopes stables (AIS)
Projet à l’étude
SPATIAL AND TEMPORAL VARIABILITY IN ISOTOPIC SIGNATURES OF BENTHIC MACROINVERTEBRATES OF A BOREAL LAKE: INFERENCES FROM CARBON (Ôl3C) AND NITROGEN (Ô15N) STABLE ISOTOPES
Summary
Introduction
·Methods
Study area
Sampling
Sample preparation and analysis
Statistical analyses and linear mixing models
Results
Between habitat variability in isotopie signatures
Link between isotopie signatures of benthie macroinvertebrates andfood sources
Between sites variability in isotopie signatures
Organie matter fluxes and temporal variability
Discussion
Spatial variability: Deeoupling between littoral and profundal habitats
Spatial variability: Variations of isotopie signatures at a larger seale
The use of linear mixing models
Temporal variability: Looking at organie matter fluxes
Conclusions
Acknowledgements
CONCLUSION GÉNÉRALE ET PERSPECTIVES
BIBLIOGRAPHIE