TY - JOUR T1 - Dynamics of phytoplankton communities in eutrophying tropical shrimp ponds affected by vibriosis A1 - Lemonnier,Hugues A1 - Lantoine,Francois A1 - Courties,Claude A1 - Guillebault,Delphine A1 - Nezan,Elisabeth A1 - Chomerat,Nicolas A1 - Escoubeyrou,Karine A1 - Galinie,Christian A1 - Blockmans,Bernard A1 - Laugier,Thierry AD - IFREMER LEAD, BP 2059, Noumea 98846, New Caledonia. AD - Univ Paris 06, Sorbonne Univ, LECOB, Observ Oceanol,UMR 8222, F-66650 Banyuls Sur Mer, France. AD - Microbia Environm, Observ Oceanol Banyuls, F-66650 Banyuls Sur Mer, France. AD - IFREMER, LER BO, Stn Biol Marine, Pl Croix,BP 40537, F-29185 Concarneau, France. AD - Univ Paris 06, Sorbonne Univ, MRS, Observ Oceanol, Plate Forme Bio2Mar, F-66650 Banyuls Sur Mer, France. AD - ORPHELINAT, GFA, 1 Rue Dame Lechanteur, Noumea 98800, New Caledonia. UR - https://doi.org/10.1016/j.marpolbul.2016.06.015 DO - 10.1016/j.marpolbul.2016.06.015 KW - Tropical aquaculture pond KW - Litopenaeus stylirostris KW - Vibriosis KW - Eutrophication KW - Phytoplankton KW - Harmful algae N2 - Tropical shrimp aquaculture systems in New Caledonia regularly face major crises resulting from outbreaks of Vibrio infections. Ponds are highly dynamic and challenging environments and display a wide range of trophic conditions. In farms affected by vibriosis, phytoplankton biomass and composition are highly variable. These conditions may promote the development of harmful algae increasing shrimp susceptibility to bacterial infections. Phytoplankton compartment before and during mortality outbreaks was monitored at a shrimp farm that has been regularly and highly impacted by these diseases. Combining information from flow cytometry, microscopy, pigment and phylogenetic analysis, the presence of Picocyanobacteria, Prasinophyceae and Diatomophyceae were detected as dominant phytoplankton groups and Cryptophyceae, Prymnesiophyceae and Dinophyceae as minor components. At the onset of the first shrimp mortalities, Bacillariophyceae increased while Cyanobacteria, Prymnesiophyceae and Dinophyceae decreased in the water column, followed by proliferation of Prasinophyceae. Several taxa were identified as potential harmful algae (Cyanobacteria, dinoflagellates and Phaeocystis). Y1 - 2016/09 PB - Pergamon-elsevier Science Ltd JF - Marine Pollution Bulletin SN - 0025-326X VL - 110 IS - 1 SP - 449 EP - 459 ID - 45411 ER -