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Evaluation of the taxonomic composition of phytoplankton using microscopy and CHEMTAX in Todos Santos Bay (Baja California, México) during 2017-2018

dc.contributorConsejo Nacional de Ciencia y Tecnología (CONACyT, México)en-US
dc.contributorNF-POGOen-US
dc.creatorRamírez-Altamirano, Yessica Lizbeth
dc.creatorGonzález-Silvera, Adriana
dc.creatorLópez-Calderón, Jorge
dc.creatorSantamaria-del-Angel, Eduardo
dc.date2023-04-30
dc.date.accessioned2023-05-09T15:57:04Z
dc.date.available2023-05-09T15:57:04Z
dc.identifierhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol51-issue2-fulltext-2988
dc.identifier10.3856/vol51-issue2-fulltext-2988
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/225394
dc.descriptionThis study analyzes the spatial and temporal variability of phytoplankton biomass and taxonomic composition in the surface waters of Todos Santos Bay, a semi-enclosed bay within the upwelling zone of the Baja California peninsula (México). Two methodological approaches (microscopy and chemotaxonomy [CHEMTAX]) were used to describe the variability of some genera and species (observed under the microscope) and the importance of those groups that cannot be observed microscopically. Phytoplankton biomarker pigments were measured with high-resolution liquid chromatography and used as input to run the CHEMTAX software to determine the contribution of the main phytoplankton groups to chlorophyll-a (Chl-a). The microscopic analyses showed that diatoms and dinoflagellates comprised 65 and 33% of the total cells, respectively. Dinoflagellates were most abundant in the inner bay and during cold months; the most frequent and abundant genera were Tripos, Protoperidinium, and Prorocentrum. Among diatoms, the most frequent genera were Cylindrotheca, Guinardia, Navicula, Pseudo-nitzschia, and Chaetoceros. CHEMTAX indicated that, together with diatoms, the flagellates prymnesiophytes and chlorophytes contributed a median of 80% to Chl-a, with chlorophytes as the most important group (29.9%). The high contribution of these flagellates suggests that they are represented by small-sized cells not visible by the light microscopy used. However, CHEMTAX largely underestimated the contribution of dinoflagellates (due to the presence of many mixotrophic species). Hence, our results emphasize the importance of using both techniques for a more detailed evaluation of the taxonomic composition of phytoplankton in this and other coastal regions.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherPontificia Universidad Católica de Valparaísoen-US
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol51-issue2-fulltext-2988/1702
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol51-issue2-fulltext-2988/2405
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol51-issue2-fulltext-2988/2406
dc.rightsCopyright (c) 2023 Latin American Journal of Aquatic Researchen-US
dc.sourceLatin American Journal of Aquatic Research; Vol 51, No 2 (2023); 218-237en-US
dc.sourcePlataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 51, No 2 (2023); 218-237es-ES
dc.source0718-560X
dc.source0718-560X
dc.subjectphytoplankton; pigments; CHEMTAX; coastal waters; temporal variabilityen-US
dc.titleEvaluation of the taxonomic composition of phytoplankton using microscopy and CHEMTAX in Todos Santos Bay (Baja California, México) during 2017-2018en-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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