Vertical distribution of the prokaryotic cell size in the Mediterranean Sea

Ferla, Rosabruna La; Maimone, Giovanna; Azzaro, Maurizio; Conversano, Fabio; Brunet, Christophe; Cabral, Anderson S.; Paranhos, Rodolfo

doi:10.1007/s10152-012-0297-0

Cited by 32 publications

(21 citation statements)

References 81 publications

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“…The corresponding cellular carbon contents of LNA and HNA cells using Norland's (1993) equation ranged between 12.3 and 16.6, and 11.8 and 21.5 fg C cell -1 , respectively, resulting in total bacterial cellular carbon content of 12.6 to 18.7 fg C cell -1 (mean 14.6 fg C cell -1 ), similar to previous studies in the Mediterranean and elsewhere (cf. Table 5 in La Ferla et al, 2012), but much lower than the recent estimates provided by these authors for epipelagic waters (46 fg C cell -1 ) after image analysis of DAPI-stained samples (La Ferla et al, 2012). This discrepancy may be partially attributable to our assumption that all cells had spherical forms.…”

Section: Empirical Assessment Of the Linkage Between Bacteria And Pricontrasting

confidence: 50%

Heterotrophic bacterial responses to the winter–spring phytoplankton bloom in open waters of the NW Mediterranean

Gomes

Gasol

Estrada

et al. 2015

Deep Sea Research Part I: Oceanographic Research Papers

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. were temporally opposite in the study periods, with maxima in March and September, respectively. Different relationships were found between physiological structure and bottom-up variables, with HNA bacteria apparently more responsive to phytoplankton only during the bloom, coinciding with larger average cell sizes of LNA bacteria.Moderate phytoplankton-bacterioplankton coupling of biomass and activity was only observed in the bloom and post-bloom phases, while relationships between both compartments were not significant under stratification. With all data pooled, bacteria were only weakly bottom-up controlled. Our analyses show that the biomass and 3 production of planktonic algae and bacteria followed opposite paths in the transition from bloom to oligotrophic conditions.

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Section: Empirical Assessment Of the Linkage Between Bacteria And Pricontrasting

confidence: 50%

Heterotrophic bacterial responses to the winter–spring phytoplankton bloom in open waters of the NW Mediterranean

Gomes

Gasol

Estrada

et al. 2015

Deep Sea Research Part I: Oceanographic Research Papers

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“…The picoprokaryotes domain is composed of two genera of cyanobacteria, i.e. Synechococcus and Prochlorococcus, while picoeukaryotes domain is mainly represented by Haptophytes and Pelagophytes (Garczarek et al, 2007;Mella-Flores et al, 2011;La Ferla et al, 2012). The nano-and micro-phytoplankton fraction accounts for about 20% of the total chl a and Dvchl a on average, and is mainly represented by Haptophytes, Pelagophytes and diatoms.…”

Section: Phytoplanktonic Datamentioning

confidence: 99%

“…picoeukarytotes and picoprokaryotes, which account about for 80% of the total chlorophyll a on average in the Mediterranean Sea. Specifically, the picoprokaryotes domain is composed by Synechococcus and Prochlorococcus (HL-ecotype and LL-ecotype), while picoeukaryotes domain is mainly represented by Haptophytes and Pelagophytes (Garczarek et al, 2007;Mella-Flores et al, 2011;La Ferla et al, 2012).…”

Section: Five-population Modelmentioning

confidence: 99%

“…Moreover, nitrate, nitrite, silicate and phosphate concentrations, were collected in polyethylene vials and stored at À20 8C during all cruises except the MedSudMed-06 Oceanographic Survey. Finally, the nutrient concentrations were obtained by using classical methods of measurement (Ribera d'Alcalà et al, 2009;La Ferla et al, 2012;Grasshoff, 1976).…”

Section: Environmental Datamentioning

confidence: 99%

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Stochastic models for phytoplankton dynamics in Mediterranean Sea

Valenti

Denaro

Spagnolo

et al. 2016

Ecological Complexity

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“…Specifically, the picoprokaryote domain is composed of two genera of cyanobacteria, i.e. Synechococcus and Prochlorococcus (HL-ecotype and LL-ecotype), while the picoeukaryote domain is mainly represented by Haptophytes and Pelagophytes [49][50][51][52][53].…”

Section: J Stat Mech (2016) 054044mentioning

confidence: 99%

The role of noise on the steady state distributions of phytoplankton populations

et al. 2016

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Abstract. The spatio-temporal behaviour of total chlorophyll concentration is investigated in the middle of the Tyrrhenian Sea by using a stochastic approach. The study is based on a reaction-diusion-taxis model, which is used to analyse the dynamics of five phytoplankton groups, responsible for about 80% of the total chlorophyll a inside the euphotic zone of the water column. The analysis is performed by considering: (i) the intraspecific competition of the phytoplanktonic groups for limiting factors, i.e. light intensity and nutrient concentration, (ii) the seasonal changes of environmental variables, and (iii) the random fluctuations of the components of the velocity field and temperature. Specifically, we investigate the eects of external perturbations, both deterministic and random, on the dynamics of phytoplankton populations, by inserting a term of multiplicative noise into the dierential equation of the nutrient dynamics. the chi-square test, show that the vertical distributions of total chlorophyll concentration are in a good agreement with the experimental data. Finally, we observe that the high intensity of environmental noise strongly modifies the steady spatial distributions of two phytoplankton groups usually localized in deeper layers, causing algal blooms in surface water.

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Vertical distribution of the prokaryotic cell size in the Mediterranean Sea

Cited by 32 publications

References 81 publications

Heterotrophic bacterial responses to the winter–spring phytoplankton bloom in open waters of the NW Mediterranean

Heterotrophic bacterial responses to the winter–spring phytoplankton bloom in open waters of the NW Mediterranean

Stochastic models for phytoplankton dynamics in Mediterranean Sea

The role of noise on the steady state distributions of phytoplankton populations

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