Introductory: Eutrophication Gradients in Coastal Lagoons as Exemplified by the Bassin d'Arcachon and the Etang du Prevost; J. Castel, et al. Part I: Eutrophication Effects on Population Dynamics, Biodiversity and Trophic Relationships in Coastal Lagoons. Heterotrophic Bacterial Activity and Bacterial Diversity in Two Coastal Lagoons as Detected by Culture and 16S rRNA Genes PCR Amplification and Partial Sequencing; S. Benlloch, et al. Description of Prokaryotic Biodiversity Along the Salinity Gradient of a Multipond Solar Saltern by Direct PCR Amplification of 16S RDNA; S. Benlloch, et al. Anoxygenic Phototrophic Bacteria in Eutrophic Coastal Lagoons of the French Mediterranean and Atlantic Coasts (Prevost Lagoon, Arcachon Bay, Certes Fishponds); R. Guyoneaud, et al. Zooplankton Variability Related to Environmental Changes in a Eutrophic Coastal Lagoon in the Po Delta; S. Sei, et al. A Field Experiment on the Effect of Two Types of Sediment Disturbance on the Rate of Recovery of a Meiobenthic Community in a Eutrophicated Lagoon; M.A. Colangelo, et al. Diel and Seasonal Vertical Distribution of Meiobenthic Copepods in Muddy Sediments of a Eutrophic Lagoon (Fish Ponds of Arcachon Bay); E. Buffan, J. Castel. The Role of Phototrophic Sulfur Bacteria as Food for Meiobenthic Harpacticoid Copepods Inhabiting Eutrophic Coastal Lagoons; L.P. Souza-Santos, et al. Part II: Eutrophication Effects on Biogeochemistry of Nitrogen and Sulfur in Coastal Lagoons. Growth of the Seaweed Ulva rigida C. Agardh in Relation to Biomass Densities, Internal Nutrient Pools and External Nutrient Supply in the Sacca di Goro Lagoon (Northern Italy); P. Viaroli, et al. Macrophyte Communities and Their Impact on Benthic Fluxes of Oxygen, Sulphide and Nutrients in Shallow Eutrophic Environments; P. Viaroli, et al. Differential Anaerobic Decomposition of Seagrass (Zostera noltii) and Macroalgal (Monostroma obscurum) Biomass from Arcachon Bay; S. Bourgues, et al. Nitrification, Denitrification, and Nitrate Ammonification in Sediments of Two Coastal Lagoons in Southern France; S. Risgaard, et al. Benthic Oxygen Respiration, Ammonium and Phosphorus Regeneration in Surficial Sediments of the Sacca Di Goro (Northern Italy) and Two French Coastal Lagoons; M. Bartoli, et al. Seasonal Variation in Rates of Heterotrophic Nitrogen Fixation (Acetylene Reduction) in Zostera noltii Meadows and Uncolonised Sediments of the Bassin d'Arcachon, South-West France; D.T. Welsch, et al. Relationship Between Porewater Organic Carbon Content, Sulphate Reduction and Nitrogen Fixation (Acetylene Reduction) in the Rhizosphere of Zostera Noltii; D.T. Welsch, et al. The Biogeochemistry of Two Eutrophic Marine Lagoons and its Effect on Microphytobenthic Communities; L.J. Stal, et al. Sulfur Bacteria in Sediments of Two Coastal Ecosystems: The Bassin d'Arcachon and the Etang du Prevost, France; B.E.M. Schaub, H. Van Gemerden (Part contents).