Título
Cell carbon content and biomass assessments of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico
Autor
LORENA PATRICIA LINACRE ROJAS
Colaborador
CITLALLI SANCHEZ ROBLES (Colaborador)
URIEL MIRABAL GOMEZ (Colaborador)
JOSE RUBEN LARA LARA (Colaborador)
María del Carmen Bazán Guzmán (Colaborador)
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: https://doi.org/10.1371/journal.pone.0247071
Materias
Resumen o descripción
This study assessed the cell carbon content and biomass for genera of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico. Carbon content estimates were based on biovolume calculations derived from linear dimension measurements of individual cells and the approximate geometric body shape of each genus. Then, biomass assessments were performed for both groups in two gulf regions (Perdido and Coatzacoalcos) using these carbon content factors and cell abundances. After four seasonal cruises, 11,817 cells of dinoflagellates and 3,412 cells of diatoms were analyzed. Diverse body shapes and cell sizes were observed among 46 dinoflagellate genera and 37 diatom genera. Nano-cells of dinoflagellates (68% <20 μm) and micro-cells of diatoms (77% 20–200 μm, mostly 50–75 μm) were predominant. According to this cell-size structure, on average, diatoms contained 40% more carbon per cell than dinoflagellates. Contrasting carbon content estimates were observed within the genera of both microalgae. Large carbon averages (>10,000 pg C cell-1) were attributed to Gonyaulacal and some occasional genera of dinoflagellates (e.g., Pyrocystis and Noctiluca) and centric diatoms. In contrast, values up to 3 orders of magnitude lower were found for Peridinial and Gymnodinial dinoflagellates and pennate diatoms. Based on these carbon content estimates, which can be considered representative for most of this oceanic ecosystem, seasonal and regional differences were found in the biomass assessments conducted for these functional groups. Overall, dinoflagellates (mostly low-carbon Gymnodinales) had larger depth-integrated biomass than diatoms (mainly rich-carbon centric forms) within the euphotic zone. An exception to it was the late-summer cruise at the Coatzacoalcos region when a surface bloom of centric diatoms was observed in stations influenced by river runoff. This work contributes useful reference information for future ecological studies and models for understanding the biogeochemical functioning of this open-ocean ecosystem. © 2021 Linacre et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Fecha de publicación
2021
Tipo de publicación
Objeto de congreso
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
PLoS ONE, Vol.16, No.2, Pags. 1-27
Idioma
Inglés
Sugerencia de citación
Linacre L, Sánchez-Robles C, Mirabal-Gómez U, Lara-Lara JR, Bazán-Guzmán C (2021) Cell carbon content and biomass assessments of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico. PLoS ONE 16(2): e0247071. https://doi.org/10.1371/journal.pone.0247071
Repositorio Orígen
Repositorio Institucional CICESE
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