The Experts below are selected from a list of 6816 Experts worldwide ranked by ideXlab platform
Daniel Grzebyk - One of the best experts on this subject based on the ideXlab platform.
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influences of sedimentation and hydrodynamics on the spatial distribution of alexandrium catenella tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
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Influences of sedimentation and hydrodynamics on the spatial distribution of Alexandrium catenella/tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
Thierry Laugier - One of the best experts on this subject based on the ideXlab platform.
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Dynamics of phytoplankton communities in eutrophying tropical shrimp ponds affected by vibriosis
Marine pollution bulletin, 2016Co-Authors: Hugues Lemonnier, Claude Courties, François Lantoine, Delphine Guillebault, Elizabeth Nézan, Nicolas Chomérat, Karine Escoubeyrou, Christian Galinié, Bernard Blockmans, Thierry LaugierAbstract: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).
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influences of sedimentation and hydrodynamics on the spatial distribution of alexandrium catenella tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
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Influences of sedimentation and hydrodynamics on the spatial distribution of Alexandrium catenella/tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
Benjamin Genovesi - One of the best experts on this subject based on the ideXlab platform.
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influences of sedimentation and hydrodynamics on the spatial distribution of alexandrium catenella tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
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Influences of sedimentation and hydrodynamics on the spatial distribution of Alexandrium catenella/tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
Sébastien Monchy - One of the best experts on this subject based on the ideXlab platform.
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Winter–Summer Succession of Unicellular Eukaryotes in a Meso-eutrophic Coastal System
Microbial Ecology, 2014Co-Authors: Urania Christaki, Konstantinos A. Kormas, Savvas Genitsaris, Clément Georges, Télesphore Sime-ngando, Eric Viscogliosi, Sébastien MonchyAbstract:The objective of this study was to explore the succession of planktonic unicellular eukaryotes by means of 18S rRNA gene tag pyrosequencing in the eastern English Channel (EEC) during the winter to summer transition. The 59 most representative (>0.1 %, representing altogether 95 % of total reads), unique operational taxonomic units (OTUs) from all samples belonged to 18 known high-level taxonomic groups and 1 unaffiliated clade. The five most abundant OTUs (69.2 % of total reads) belonged to Dinophyceae, Cercozoa, Haptophyceae, marine alveolate group I, and Fungi. Cluster and network analysis between samples distinguished the winter, the pre-bloom, the Phaeocystis globosa bloom and the post-bloom early summer conditions. The OTUs-based network revealed that P. globosa showed a relatively low number of connections—most of them negative—with all other OTUs. Fungi were linked to all major taxonomic groups, except Dinophyceae. Cercozoa mostly co-occurred with the Fungi, the Bacillariophyceae and several of the miscellaneous OTUs. This study provided a more detailed exploration into the planktonic succession pattern of the EEC due to its increased depth of taxonomic sampling over previous efforts based on classical monitoring observations. Data analysis implied that the food web concept in a coastal system based on predator–prey (e.g. grazer–phytoplankton) relationships is just a part of the ecological picture; and those organisms exploiting a variety of strategies, such as saprotrophy and parasitism, are persistent and abundant members of the community.
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Winter-summer succession of unicellular eukaryotes in a meso-eutrophic coastal system
Microbial Ecology, 2014Co-Authors: Urania Christaki, Konstantinos A. Kormas, Savvas Genitsaris, Clément Georges, Télesphore Sime-ngando, Eric Viscogliosi, Sébastien MonchyAbstract:The objective of this study was to explore the succession of planktonic unicellular eukaryotes by means of 18S rRNA gene tag pyrosequencing in the eastern English Channel (EEC) during the winter to summer transition. The 59 most representative (>0.1 %, representing altogether 95 % of total reads), unique operational taxonomic units (OTUs) from all samples belonged to 18 known high-level taxonomic groups and 1 unaffiliated clade. The five most abundant OTUs (69.2 % of total reads) belonged to Dinophyceae, Cercozoa, Haptophyceae, marine alveolate group I, and Fungi. Cluster and network analysis between samples distinguished the winter, the pre-bloom, the Phaeocystis globosa bloom and the post-bloom early summer conditions. The OTUs-based network revealed that P. globosa showed a relatively low number of connections--most of them negative--with all other OTUs. Fungi were linked to all major taxonomic groups, except Dinophyceae. Cercozoa mostly co-occurred with the Fungi, the Bacillariophyceae and several of the miscellaneous OTUs. This study provided a more detailed exploration into the planktonic succession pattern of the EEC due to its increased depth of taxonomic sampling over previous efforts based on classical monitoring observations. Data analysis implied that the food web concept in a coastal system based on predator-prey (e.g. grazer-phytoplankton) relationships is just a part of the ecological picture; and those organisms exploiting a variety of strategies, such as saprotrophy and parasitism, are persistent and abundant members of the community.
David Mouillot - One of the best experts on this subject based on the ideXlab platform.
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influences of sedimentation and hydrodynamics on the spatial distribution of alexandrium catenella tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
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Influences of sedimentation and hydrodynamics on the spatial distribution of Alexandrium catenella/tamarense resting cysts in a shellfish farming lagoon impacted by toxic blooms
Harmful Algae, 2013Co-Authors: Benjamin Genovesi, Annie Fiandrino, Thierry Laugier, Andre Vaquer, Mohamed Laabir, David Mouillot, Daniel GrzebykAbstract:Abstract Since resting cysts are a potential seeding source for blooms, the presence of these cysts in sediments is a marker of an established population for a number of harmful algal species. The spatial patterns of cyst density in relation to sediment characteristics and hydrodynamics are still largely misunderstood. This study investigated the spatial distribution of resting cysts belonging to the Alexandrium tamarense species complex (Dinophyceae) in sediments of a Mediterranean coastal lagoon (Thau Lagoon, France). This lagoon, hosting shellfish farming, is regularly impacted by toxic Alexandrium catenella blooms. The average cyst density across the whole lagoon was rather low,
