Phytoplankton of the northern coastal and shelf waters of the Yucatan Peninsula, southeastern Gulf of Mexico, Mexico

Merino-Virgilio, Fany del Carmen; Okolodkov, Yuri B.; Aguilar-Trujillo, Ana C.; Silveira, Jorge A. Herrera

doi:10.15560/9.4.771

Cited by 24 publications

(11 citation statements)

References 13 publications

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“…Although these two heterotrophic and unarmored genera were occasionally found in this study, some individuals showed large dimensions (e.g., >200 μm in diameter for Noctiluca ); hence, only a few cells per liter could be suffient to yield significant carbon biomass for these organisms. Large specimens of Noctiluca scintillans (~300–2,000 μm in diameter) have been previously reported in coastal waters of Veracruz and Tabasco [ 3 ] and in continental shelf waters of the Yucatan Peninsula [ 15 ]. Besides, considering the important role of this species in other marine ecosystems as a consumer of some potentially toxic algal blooms [ 45 ], its carbon content and biomass estimated in this work may be useful for trophic ecology studies in SGoM waters.…”

Section: Resultsmentioning

confidence: 99%

“…Both were represented mostly by small-sized and low-carbon-content genera, such as the unarmored dinoflagellates Gymnodinium and Gyrodinium , and the diatoms Nitzschia and Navicula ( Fig 6 ). These genera have been frequently recorded in different seasons of the year in several regions of the SGoM ecosystem [ 7 , 8 , 11 , 15 , 18 , 31 ]. Although both groups have a low carbon content per cell ( S2 Fig ), the high abundance of Gymnodiniales made a significant contribution to total dinoflagellate biomass (47–64% of total carbon), while pennate diatoms only made as much as 25% of total diatom biomass ( Fig 8 ).…”

Section: Resultsmentioning

confidence: 99%

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Cell carbon content and biomass assessments of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico

Linacre¹,

Sánchez-Robles²,

Mirabal-Gómez³

et al. 2021

PLoS ONE

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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.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Cell carbon content and biomass assessments of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico

Linacre¹,

Sánchez-Robles²,

Mirabal-Gómez³

et al. 2021

PLoS ONE

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“…The highest density and diversity were registered at the westernmost stations (i.e. stations 3 and 6), which are framed by the three marine inlets and featured environmental conditions most similar to marine ones (Ghinaglia, Herrera-Silveira, & Comín, 2004;Merino-Virgilio, Okolodkov, Aguilar-Trujillo, & Herrera-Silveira, 2013). Marine salinity, the potential exchange of water with the sea and the presence of considerable proportions of subaquatic vegetation that provide a broad spectrum of habitats (Giangrande, 1988;Hernández-Alcántara et al, 2011) may interact to explain such fauna patterns.…”

Section: Discussionmentioning

confidence: 99%

Polychaete assemblages in a tropical hypersaline coastal lagoon of the southeastern Gulf of Mexico during the rainy season

Dávila-Jiménez.

Papiol

Hernández‐Alcántara

et al. 2019

RBT

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Introduction: The Río Lagartos lagoon, located in the Ría Lagartos Biosphere Reserve, Yucatán, Gulf of Mexico, is a coastal hypersaline system ca. 80 km long (east-west). It comprises three basins: western (close to Río Lagartos fishermen village), middle (Las Coloradas) and eastern (close to El Cuyo fishermen village), that communicate through very narrow natural channels. Despite several studies have been performed on the vertebrate fauna, the aquatic invertebrates, and especially polychaetes, remain largely unknown. Objective: The objective of this study is to describe the composition and distribution of the benthic polychaete community, and to analyse potential environmental drivers. Methods: The biological material was collected in 16 stations distributed along the lagoon during the rainy season (September 2017). Two replicates per station were obtained using a Ponar standard dredge or cores (6” diameter). Environmental variables such as grain size, organic carbon content in the sediments, and salinity, among others, were measured. Results: A total of 827 specimens belonging to 26 species and 16 families were identified. Of these, 23 species are new records for the Río Lagartos lagoon. Community composition changed between the different basins associated with strong gradients in salinity, subaquatic vegetation (algae and seagrasses) proportions in the samples and grain size. No polychaetes were recorded at the easternmost basin (El Cuyo basin), where salinity was between 67-80 psu. In the rest of the lagoon, the distribution of polychaetes was heterogeneous, especially near the mouth (western basin), where the highest and lowest density, species richness and diversity were recorded. The highest density was found at station 6, where dense algal mats of the genus Avrainvillea dominated. The families Syllidae and Nereididae were the most abundant and widely distributed families in the lagoon. The species Syllis lagunae and Nereis pelagica dominated the western basin and Prionospio heterobranchia and Sphaerosyllis taylori dominated the middle basin. Conclusions: The salinity records associated with some species were well above the top limits previously reported, establishing the euryhaline character of many species in the region.

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“…[84][85][86] However, data recorded for the Veracruz Reef System indicated a greater concentration of dinoflagellates in December and January, mainly of species of the genera Protoperidinium and Dinophysis. [87,88] These authors recorded the presence of Dinophysis ovum, a species that was also recorded in great swarms in the northern GM in January and February of 2008.…”

Section: Relationships Between Dms Dmspd and Dmspp And Chlorophyll-mentioning

confidence: 99%

Spatial variability of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) in the southern Gulf of Mexico

et al. 2016

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Environmental context. Dimethylsulfide (DMS), the main biogenic sulfur compound in the atmosphere, is produced by the marine biosphere and plays an important role in the atmospheric sulfur cycle. This study recorded the spatial variability of DMS and dissolved and particulate dimethylsulfoniopropionate (DMSP) in the water column of the southern Gulf of Mexico. The results suggest that the spatial variability of DMS and DMSP is directly related to the hydrodynamics of the study area.Abstract. The spatial variability of dimethylsulfide (DMS) and dissolved and particulate dimethylsulfoniopropionate (DMSPd and DMSPp) was recorded in the southern Gulf of Mexico at three different depths (10, 30 and 60 m) in January 2013. DMS and DMSP values were recorded through solid-phase microextraction coupled to gas chromatography. Average concentrations of DMS (2.8 AE 1.5 nM), DMSPd (1.7 AE 0.9 nM) and DMSPp (352 AE 157 nM) were significantly correlated with chlorophyll-a concentrations and the depth of the mixed layer. Vertical concentration profiles were similar, indicating a well-mixed water column with a thermocline at a depth of 50-100 m. Average DMS sea-to-air flux was 5.0 AE 1.7 mmol m À2 day À1 . The greatest fluxes were recorded at the stations in the western region of the study area, owing to the combined effect of high DMS concentrations (3.7-7.21 nM) and a high wind speed (4.4-6.8 m s À1 ). The greatest concentrations were recorded at the stations nearest the coast. The distribution of DMS and DMSP was apparently related to the oceanic hydrodynamics.

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Phytoplankton of the northern coastal and shelf waters of the Yucatan Peninsula, southeastern Gulf of Mexico, Mexico

Cited by 24 publications

References 13 publications

Cell carbon content and biomass assessments of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico

Cell carbon content and biomass assessments of dinoflagellates and diatoms in the oceanic ecosystem of the Southern Gulf of Mexico

Polychaete assemblages in a tropical hypersaline coastal lagoon of the southeastern Gulf of Mexico during the rainy season

Spatial variability of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) in the southern Gulf of Mexico

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