Distribution and diversity of marine picocyanobacteria community: Targeting of Prochlorococcus ecotypes in winter conditions (southern Adriatic Sea)

Babić, Ivana; Petrić, Ines; Bosak, Sunčica; Mihanović, Hrvoje; Radić, Iris Dupčić; Ljubešić, Zrinka

doi:10.1016/j.margen.2017.05.014

Cited by 14 publications

(13 citation statements)

References 56 publications

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“…Prochlorococcus showed the highest diversity (58 strains) among the picocyanobacteria in the bay, although the genus comprised only 4% of the total sequences. The majority of the sequences belong to the clades with adaptations to intense light (HL II), in agreement with the literature for tropical and subtropical marine surface waters (e.g., Rocap et al, 2002 ; Bouman et al, 2006 ; Zwirglmaier et al, 2008 ; Biller et al, 2014 ; Babić et al, 2017 ). The increase in Prochlorococcus sequences during high tides suggests that cells are transported from ocean waters to the interior of the bay in these periods (Figure 3A ).…”

Section: Discussionsupporting

confidence: 89%

Metagenomic Analysis of Cyanobacteria in an Oligotrophic Tropical Estuary, South Atlantic

et al. 2018

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This study assessed the species composition, distribution, and functional profiles of cyanobacteria in Camamu Bay, a tropical oligotrophic estuarine system on the northeast coast of Brazil, using shotgun metagenomic sequencing. Surface-water samples were evaluated in two different rainfall periods (rainy and dry seasons), at nine stations in the three hydrodynamic regions of the bay. At a fixed sampling station, on each season, samples were taken over a tidal cycle at 3-h intervals over 12 h. A total of 219 cyanobacterial taxa were identified, demonstrating a diverse community of freshwater, euryhaline, and marine cyanobacteria. The genera of greater relative abundance, Synechococcus and Prochlorococcus, corresponded to the picoplankton fraction. Although Camamu Bay has conspicuous marine characteristics, the contribution of freshwater during the rainy season caused variation in cyanobacteria community, with an increase in species richness. Due the high prevalence of Synechococcus (90% of the sequences), the functional analysis revealed only minor differences in gene content between the dry and rainy seasons. In both rainy and dry seasons, an increase in Prochlorococcus relative abundance occurred during high tide, demonstrating the tidal influence in the bay. The environmental characteristics of the bay provide niche conditions for a wide variety of cyanobacteria, including freshwater, euryhaline, and marine strains.

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Section: Discussionsupporting

confidence: 89%

Metagenomic Analysis of Cyanobacteria in an Oligotrophic Tropical Estuary, South Atlantic

et al. 2018

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“…This was supported by chlorophyll a concentrations, that peaked after the first week of incubation reflecting an increase in total autotrophic biomass, mainly diatoms (in the NPSi-C treatment) and dinoflagellates (in the NP-C treatment) (Pearman et al, 2016). Prochlorococcus was a less abundant or minor component of the initial community, as reported for surface waters in other oligotrophic coastal areas (Veldhuis and Kraay, 1993;Babiae et al, 2017;Pearman et al, 2017), and did not respond to nutrient additions as expected by its higher preference for ammonium instead of nitrate (Berube et al, 2015;Biller et al, 2015). On the other hand, the lack of nutrient addition in the control treatment precluded the development of phytoplankton and of Synechococcus.…”

Section: Discussionsupporting

confidence: 67%

Picocyanobacteria Community and Cyanophage Infection Responses to Nutrient Enrichment in a Mesocosms Experiment in Oligotrophic Waters

et al. 2020

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Prochlorococcus and Synechococcus are pico-sized cyanobacteria that play a fundamental role in oceanic primary production, being particularly important in warm, nutrient-poor waters. Their potential response to nutrient enrichment is expected to be contrasting and to differ from larger phytoplankton species. Here, we used a metagenomic approach to characterize the responses to nutrient enrichment in the community of picocyanobacteria and to analyze the cyanophage response during a mesocosms experiment in the oligotrophic Red Sea. Natural picoplankton community was dominated by Synechococcus clade II, with marginal presence of Prochlorococcus (0.3% bacterial reads). Increased nutrient input triggered a fast Synechococcus bloom, with clade II being the dominant, with no response of Prochlorococcus growth. The largest bloom developed in the mesocosms receiving a single initial input of nutrients, instead of daily additions. The relative abundances of cyanophage sequences in cellular metagenomes increased during the experiment from 12.6% of total virus reads up to 40% in the treatment with the largest Synechococcus bloom. The subsequent collapse of the bloom pointed to a cyanophage infection on Synechococcus that reduced its competitive capacity, and was then followed by a diatom bloom. The cyanophage attack appears to have preferentially affected the most abundant Synechococcus clade II, increasing the evenness within the host population. Our results highlight the relevance of host-phage interactions on determining population dynamics and diversity of Synechococcus populations.

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“…At a global scale, their higher abundances were observed in warm waters as demonstrated by Flombaum et al (2013). Nevertheless, several studies reported abundances of 10 3 -10 4 cells mL −1 in the winter (temperature < 15°C) in the Mediterranean Sea (Vaulot and Partensky 1990;Babić et al 2017;Salhi et al 2017). Prochlorococcus has even been detected within temperatures ranging from 6.33 to 26.93°C in the Adriatic Sea (Šantić et al 2011).…”

Section: Syn1 Prochlmentioning

confidence: 99%

Pico- and Nanophytoplankton Dynamics in Two Coupled but Contrasting Coastal Bays in the NW Mediterranean Sea (France)

Delpy

Serranito

Jamet

et al. 2018

Estuaries and Coasts

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Due to its ecological context, the Toulon bay represents a site of scientific interest to study temporal plankton distribution, particularly pico-and nanophytoplankton dynamics. A monthly monitoring was performed during a two-year cycle (October 2013-December 2015) at two coupled sampling sites, referred to as Little and Large bays, which had different morphometric characteristics and human pressures. Flow cytometry analyses highlighted the fact that pico-and nanophytoplankton were more abundant in the eutrophic Little bay. Furthermore, it evidenced two community structures across the Toulon bays: at times, a co-dominance of picoeukaryotes, nanoeukaryotes, Synechococcus 1-like cells and Prochlorococcus-like cells was found, and at other times, a Synechococcus 1like dominated community existed. The alternation of one structure or the other can be explained by a combined action of temperature regime, nutrient conditions and degree of contamination. This study showed that pico-and nanophytoplankton dynamics were mainly driven by temperature in both sites, as in other temperate Mediterranean regions. Thus, the community was mainly composed of picoeukaryotes and Prochlorococcus-like cells in the winter (< 15 °C), while it was dominated by Synechococcus 1-like cells in the summer (> 20 °C). Additionally, the multiple human stressors in the Little bay seemed to affect the increase in abundance of Synechococcus 1-like cells as they were preferentially observed in the Large bay.

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Distribution and diversity of marine picocyanobacteria community: Targeting of Prochlorococcus ecotypes in winter conditions (southern Adriatic Sea)

Cited by 14 publications

References 56 publications

Metagenomic Analysis of Cyanobacteria in an Oligotrophic Tropical Estuary, South Atlantic

Metagenomic Analysis of Cyanobacteria in an Oligotrophic Tropical Estuary, South Atlantic

Picocyanobacteria Community and Cyanophage Infection Responses to Nutrient Enrichment in a Mesocosms Experiment in Oligotrophic Waters

Pico- and Nanophytoplankton Dynamics in Two Coupled but Contrasting Coastal Bays in the NW Mediterranean Sea (France)

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