In:
PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 2 ( 2021-2-17), p. e0247071-
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0247071
DOI:
10.1371/journal.pone.0247071.g001
DOI:
10.1371/journal.pone.0247071.g002
DOI:
10.1371/journal.pone.0247071.g003
DOI:
10.1371/journal.pone.0247071.g004
DOI:
10.1371/journal.pone.0247071.g005
DOI:
10.1371/journal.pone.0247071.g006
DOI:
10.1371/journal.pone.0247071.g007
DOI:
10.1371/journal.pone.0247071.g008
DOI:
10.1371/journal.pone.0247071.g009
DOI:
10.1371/journal.pone.0247071.g010
DOI:
10.1371/journal.pone.0247071.g011
DOI:
10.1371/journal.pone.0247071.t001
DOI:
10.1371/journal.pone.0247071.t002
DOI:
10.1371/journal.pone.0247071.s001
DOI:
10.1371/journal.pone.0247071.s002
DOI:
10.1371/journal.pone.0247071.s003
DOI:
10.1371/journal.pone.0247071.s004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2021
detail.hit.zdb_id:
2267670-3
Permalink