Dynamics of phytoplankton communities in eutrophying tropical shrimp ponds affected by vibriosis
|Author(s)||Lemonnier Hugues1, Lantoine Francois2, Courties Claude2, Guillebault Delphine2, 3, Nezan Elisabeth4, Chomerat Nicolas4, Escoubeyrou Karine5, Galinie Christian6, Blockmans Bernard6, Laugier Thierry1|
|Affiliation(s)||1 : IFREMER LEAD, BP 2059, Noumea 98846, New Caledonia.
2 : Univ Paris 06, Sorbonne Univ, LECOB, Observ Oceanol,UMR 8222, F-66650 Banyuls Sur Mer, France.
3 : Microbia Environm, Observ Oceanol Banyuls, F-66650 Banyuls Sur Mer, France.
4 : IFREMER, LER BO, Stn Biol Marine, Pl Croix,BP 40537, F-29185 Concarneau, France.
5 : Univ Paris 06, Sorbonne Univ, MRS, Observ Oceanol, Plate Forme Bio2Mar, F-66650 Banyuls Sur Mer, France.
6 : ORPHELINAT, GFA, 1 Rue Dame Lechanteur, Noumea 98800, New Caledonia.
|Source||Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2016-09 , Vol. 110 , N. 1 , P. 449-459|
|WOS© Times Cited||12|
|Keyword(s)||Tropical aquaculture pond, Litopenaeus stylirostris, Vibriosis, Eutrophication, Phytoplankton, Harmful algae|
|Abstract||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).|