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Diversity of harmful unarmoured dinoflagellates from the Catalan coast, NW Mediterranean Sea

AuthorsReñé, Albert ; Camp, Jordi ; Garcés, Esther
Issue Date29-Oct-2014
CitationICHA New Zealand 2014. Abstract book: 59 (2014)
AbstractUnarmoured species represent ~25% of the described dinoflagellates. However, their identification is challenging because the lack of a theca results in their deformation when fixed, and several of their key characters are difficult to observe in live specimens under the light microscope. Consequently, in analyses of fixed samples, unarmoured dinoflagellates, which include several harmful and/or toxic species, often remain unidentified or undetected. Although the composition of the phytoplankton along the Catalan coast, NW Mediterranean Sea, has been well studied since the 1960s, the applied methodologies usually impeded or hindered the identification of unarmoured dinoflagellates. In the present work, the diversity of unarmoured dinoflagellates in this geographic area was studied during 2011-2013 combining morphological observations of live specimens and genetic methods (single-cell PCR). This approach resulted in the detection of 60 unarmoured species, nine of which were potentially toxic species and six were high-biomass bloom producers. Karenia umbella and Cochlodinium fulvescens were reported for the first time in the Mediterranean, and Cochlodinium polykrikoides, Karenia mikimotoi, and K. cf. papilionacea along the Catalan coast. The blooms detected for Barrufeta bravensis, Gymnodinium impudicum, Gymnodinium litoralis, and Karlodinium armiger, whose type locality is in the NW Mediterranean Sea, highlight the importance of these unarmoured dinoflagellates and the need for further efforts to understand their role in the study area. Moreover, although the efforts conducted during the last decades, our findings point out the lack of knowledge about the worldwide distribution of many toxic and harmful species
DescriptionThe 16th International Conference on Harmful Algae (ICHA 2014 New Zealand), Advancement Through Shared Science, 27-31 October 2014, Wellington, New Zealand.-- 1 page
Publisher version (URL)http://www.icha2014nz.com/?page_id=36
Appears in Collections:(ICM) Comunicaciones congresos
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