Unveiling species diversity within the toxic diatom genus Pseudo-nitzschia from the fjords and channels of Magallanes (48º-51º S), Chile
Research output: Contribution to journal › Journal article › peer-review
Species of the potentially toxic diatom genus Pseudo-nitzschia are common components of the phytoplankton community in the fjords and channel systems of the Magallanes Subantarctic region. Despite Pseudo-nitzschia species forming recurrent harmful algal blooms (HABs) in this region, Chilean monitoring programs have his-torically simply grouped species of this genus into two groups (P. group seriata and P. group delicatissima) ac-cording to basic cell morphology under light microscopy, or as Pseudo-nitzschia spp. Based on ultrastructural features obtained from scanning electron microscopy (SEM), this study revealed more diversity within the genus than previously thought, identifying six Pseudo-nitzschia species in the Magallanes Subantarctic region (48 degrees-56 degrees S) from samples collected during a 11-year period (2006-2017). Most importantly, the study: 1) represent the first report on diversity and distribution of Pseudo-nitzschia species in this Patagonian region; 2) expanded the known distribution of P. australis and P. fraudulenta along the Chilean coast (down to 50 degrees S); 3) confirmed previous records of P. pungens and P. cf. delicatissima; and 4) formally confirm the presence of P. heimii and P. calliantha in subantartic waters.
Original language | English |
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Article number | 102957 |
Journal | Progress in Oceanography |
Volume | 211 |
Number of pages | 13 |
ISSN | 0079-6611 |
DOIs | |
Publication status | Published - 2023 |
- Harmful algal blooms, Chilean Patagonia, Fjords and channels, Toxin, P, australis, SP-NOV BACILLARIOPHYCEAE, DOMOIC ACID, COMPLEX BACILLARIOPHYCEAE, MOLECULAR PHYLOGENY, MALAYSIAN BORNEO, MORPHOLOGY, STRAIT, WATERS, COAST, ATLANTIC
Research areas
ID: 337591846