5 documents found, page 1 of 1
Effect of temperature on growth and yessotoxin production of protoceratium reti...
Barbosa, Miguel; Reis Costa, Pedro; David, Helena; Lage, Sandra; Amorim, AnaThe dinoflagellates Protoceratium reticulatum and Lingulodinium polyedra are potential yessotoxin (YTX) producers, which have been associated with blooms responsible for economic, social, and ecological impacts around the world. They occur in Iberian waters, but in this region, little is known of their ecophysiology and toxin profiles. This study investigated the growth and toxin production of two strains of ea...
Ocurrence of Ostreopsis in two temperate coastal bays (SW iberia): Insights fro...
Santos, Mariana; Oliveira, Paulo B.; Moita, Maria Teresa; David, Helena; Caeiro, Maria Filomena; Zingone, Adriana; Amorim, Ana; Silva, AlexandraThe benthic genus Ostreopsis contains toxic-bloom forming species and is an important cause of concern in warm-temperate and tropical waters. On the coast of Portugal, NE Atlantic, the occurrence of Ostreopsis cf. siamensis and Ostreopsis cf. ovata has been reported since 2008 and 2011, respectively. This work aims to understand the favorable conditions for high concentrations of Ostreopsis cells in the plankto...
Ocurrence of Ostreopsis in two temperate coastal bays (SW iberia): Insights fro...
Santos, Mariana; Oliveira, Paulo B.; Calixto De Jesus Moita Garnel, Maria Teresa; David, Helena; Caeiro, Maria Filomena; Zingone, Adriana; Amorim, AnaThe benthic genus Ostreopsis contains toxic-bloom forming species and is an important cause of concern in warm-temperate and tropical waters. On the coast of Portugal, NE Atlantic, the occurrence of Ostreopsis cf. siamensis and Ostreopsis cf. ovata has been reported since 2008 and 2011, respectively. This work aims to understand the favorable conditions for high concentrations of Ostreopsis cells in the plankto...
Physiological response of Prorocentrum lima (Dinophyceae) to varying light inte...
David, Helena; Laza-Martínez, Aitor; Kromkamp, Jacco C; Orive, EmmaThe benthic dinoflagellate Prorocentrum lima is among the most common toxic morphospecies with a cosmopolitan distribution. This study explored if strains from different environments and different morphotypes, isolated from three locations in the Atlantic Iberian Peninsula and two from the Mediterranean Sea, showed different responses to varying light regimes, after confirming that all strains belonged to the s...
Phylogeny and species delineation in the marine diatom Pseudo-nitzschia (Bacill...
Lim, Hong Chang; Tan, Suh Nih; Teng, Sing Tung; Lundholm, Nina; Orive, Emma; David, Helena; Quijano-Scheggia, Sonia; Leong, Sandric Chee YewAnalyses of the mitochondrial cox1, the nuclear-encoded large subunit (LSU), and the internal transcribed spacer 2 (ITS2) RNA coding region of Pseudo-nitzschia revealed that the P. pseudodelicatissima complex can be phylogenetically grouped into three distinct clades (Groups I-III), while the P. delicatissima complex forms another distinct clade (Group IV) in both the LSU and ITS2 phylogenetic trees. It was elu...