Abundance and pigment type composition of picocyanobacteria in Barguzin Bay, Lake Baikal

Katano, Toshiya; Nakano, Susumu; Mitamura, Osamu; Yoshida, Haruko; Azumi, Hisayuki; Matsuura, Yoshiki; Tanaka, Yuji; Maezono, Hiraku; Satoh, Yasuhiro; Satoh, Takeshi; Sugiyama, Yuko; Watanabe, Yasunori; Mimura, Tetsuro; Akagashi, Yuki; Machida, Hiroshi; Drucker, Valentin; Тихонова, И. В.; Белых, О. И.; Fialkov, V. A.; Han, Moonsik; Kang, Sung‐Ho; Sugiyama, Masahito

doi:10.1007/s10201-008-0239-3

Cited by 11 publications

(9 citation statements)

References 37 publications

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“…Similar result was also found in Suruga Bay, Japan (Shimada et al, 1995). This group was phycocyanobilin (PC)-rich syn (Shimada et al, 1995) and was introduced into the marine water column by river inputs, which mainly consisted of Synechococcus from the river freshwater (Katano et al, 2008;Olson et al, 1988).…”

Section: Spatial Distribution Of Picophytoplankton and Nanophytoplanksupporting

confidence: 83%

Distribution of microbial populations and their relationship with environmental variables in the North Yellow Sea, China

Bai

Wang

Liang

et al. 2012

J. Ocean Univ. China

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In order to understand the large-scale spatial distribution characteristics of picoplankton, nanophytoplankton and virioplankton and their relationship with environmental variables in coastal and offshore waters, flow cytometry (FCM) was used to analyze microbial abundance of samples collected in summer from four depths at 36 stations in the North Yellow Sea (NYS). The data revealed spatial heterogeneity in microbial populations in the offshore and near-shore waters of the NYS during the summer. For the surface layer, picoeukaryotes were abundant in the near-shore waters, Synechococcus was abundant in the offshore areas, and bacterial and viral abundances were high in the near-shore waters around the Liaodong peninsula. In the near-shore waters, no significant vertical variation of picophytoplankton (0.2-2μm) abundance was found. However, the nanophytoplankton abundance was higher in the upper layers (from the surface to 10 m depth) than in the bottom layer. For the offshore waters, both pico-and nanophytoplankton (2-20μm) abundance decreased sharply with depth in the North Yellow Sea Cold Water Mass (NYSCWM). But, for the vertical distribution of virus and bacteria abundance, no significant variation was observed in both near-shore and offshore waters. Autotrophic microbes were more sensitive to environmental change than heterotrophic microbes and viruses. Viruses showed a positive correlation with bacterial abundance, suggesting that the bacteriophage might be prominent for virioplankton (about 0.45μm) in summer in the NYS and that viral abundance might play an important role in microbial loop functions.

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Section: Spatial Distribution Of Picophytoplankton and Nanophytoplanksupporting

confidence: 83%

Distribution of microbial populations and their relationship with environmental variables in the North Yellow Sea, China

Bai

Wang

Liang

et al. 2012

J. Ocean Univ. China

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“…Reasons for this may be the presence of favourable nutrient, temperature or light conditions, or ecological niches in a wider sense (Postius & Ernst, ), for example, substrates or biofilms (Becker et al ., ). Furthermore, near‐shore lake water may provide better growth conditions for PC‐rich APP cells, as was demonstrated in Lake Baikal (Katano et al ., ). Pelagic PC‐rich Synechococcus isolates from Lake Constance were shown to respond to N‐deprivation by exudation of high‐molecular weight polysaccharides, a feature not detectable in PE‐rich strains (Postius & Böger, ).…”

Section: Resultsmentioning

confidence: 97%

“…This may also hold true in the littoral areas of lakes, where high light conditions may lead to the dominance of certain PC‐rich Synechococcus genotypes (e.g. in biofilms on macrophytes in the surf zone), and where the presence of certain nutrient (Katano et al ., ) or physical conditions such as temperature regimes (Sommer, ; Schweizer, ; Gaedke & Weisse, ), and substrates (Becker et al ., ) might provide suitable conditions in the littoral habitat as well.…”

Section: Resultsmentioning

confidence: 99%

Spatio-temporal niche partitioning of closely related picocyanobacteria clades and phycocyanin pigment types in Lake Constance (Germany)

Becker

Sánchez‐Baracaldo

Singh

et al. 2012

FEMS Microbiol Ecol

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We found that the clade-specific abundance dynamics of Synechococcus type picocyanobacteria in the pelagic and littoral zone macro-habitats of Lake Constance (Germany) challenge the hypothesis of a regular annual succession of picocyanobacteria genotypes in temperate zone lakes. Methods used in this study were quantitative Taq nuclease assays (TNA), denaturing gradient gel electrophoresis (DGGE), a 19-month time series analysis (with two isothermal and two stratified periods) and genotyping of a new littoral phycocyanin (PC)-rich Synechococcus strain collection. The recorded differences between the two macro-habitats and between seasons or years, and the observed effect of water column mixis in winter on the inversion of clade-specific dominance ratios in Lake Constance might explain the known inter-annual differences in abundance and dynamics of the autotrophic picoplankton (APP) in lakes. The APP in Lake Constance shows a high genetic diversity with a low overall abundance, similar to the APP in the Baltic Sea, but different from Lake Biwa in Japan or lakes in the UK. Our results indicate that APP bloom events in both macro-habitats of Lake Constance are driven by phycoerythrin-rich Synechococcus genotypes of the Subalpine Cluster I. DGGE revealed the presence of a diverse periphyton (biofilm) community of the PC-rich Synechococcus pigment type in the littoral zone in early spring, when no such community was detectable in the pelagic habitat. A more sensitive and quantitative approach with TNA, however, revealed an intermittent presence of one PC-rich genotype in the plankton. We discuss the seasonal development of the pelagic and littoral PC-rich community, and while we cannot rule out a strain isolation bias, we found that isolated PC-rich strains from the pelagic habitat have different genotypes when compared to new littoral strains. We also observed littoral substrates colonized by specific PC-rich Synechococcus genotypes.

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“…Moreover, it has been suggested that PC-type Synechococcus strains have a greater ability to deal with salinity variation than marine PE-type Synechococcus (4,55). Although high abundance of PC-type Synechococcus strains was often found in estuarine waters (56,57), only a few studies have reported their community composition at the molecular level. In this study, we found that PC-type Synechococcus assemblages in Hong Kong estuarine waters were composed of marine-source Synechococcus (subcluster 5.2, represented by Synechococcus sp.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the Seasonal Variations of Synechococcus Assemblage Structures in Estuarine Waters and Coastal Waters of Hong Kong

Xia

Vidyarathna

Palenik

et al. 2015

Appl Environ Microbiol

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bSeasonal variation in the phylogenetic composition of Synechococcus assemblages in estuarine and coastal waters of Hong Kong was examined through pyrosequencing of the rpoC1 gene. Sixteen samples were collected in 2009 from two stations representing estuarine and ocean-influenced coastal waters, respectively. Synechococcus abundance in coastal waters gradually increased from 3.6 ؋ 10 3 cells ml ؊1 in March, reaching a peak value of 5.7 ؋ 10 5 cells ml ؊1 in July, and then gradually decreased to 9.3 ؋ 10 3 cells ml ؊1 in December. The changes in Synechococcus abundance in estuarine waters followed a pattern similar to that in coastal waters, whereas its composition shifted from being dominated by phycoerythrin-rich (PE-type) strains in winter to phycocyanin-only (PC-type) strains in summer owing to the increase in freshwater discharge from the Pearl River and higher water temperature. The high abundance of PC-type Synechococcus was composed of subcluster 5.2 marine Synechococcus, freshwater Synechococcus (F-PC), and Cyanobium. The Synechococcus assemblage in the coastal waters, on the other hand, was dominated by marine PE-type Synechococcus, with subcluster 5.1 clades II and VI as the major lineages from April to September, when the summer monsoon prevailed. Besides these two clades, clade III cooccurred with clade V at relatively high abundance in summer. During winter, the Synechococcus assemblage compositions at the two sites were similar and were dominated by subcluster 5.1 clades II and IX and an undescribed clade (represented by Synechococcus sp. strain miyav). Clade IX Synechococcus was a relatively ubiquitous PE-type Synechococcus found at both sites, and our study demonstrates that some strains of the clade have the ability to deal with large variation of salinity in subtropical estuarine environments. Our study suggests that changes in seawater temperature and salinity caused by the seasonal variation of monsoonal forcing are two major determinants of the community composition and abundance of Synechococcus assemblages in Hong Kong waters. Members of the Synechococcus group of widely distributed and abundant picocyanobacteria are important primary producers in the surface waters of global oceans (1). Strains of Synechococcus are both phenotypically and phylogenetically diverse and dynamic (2, 3). Based on gene markers, like the 16S rRNA gene, marine Synechococcus strains form a well-defined clade termed cluster 5 (4, 5), which is divided into 3 subclusters: 5.1, 5.2, and 5.3. Of these, subcluster 5.1 is the most abundant and diverse subcluster in marine environments and is further divided into at least 9 clades (6). The high genetic diversity of Synechococcus is reflected in the ecogeographic and temporal distribution of different ecotypes. Subcluster 5.1 clade I mainly dominates in temperate mesotrophic ocean waters, while clade II is mainly present in offshore, continental shelf, and oligotrophic warm waters (4, 7). Subcluster 5.2 Synechococcus strains are phycocyanin-enriched (PC-type) euryhaline s...

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Abundance and pigment type composition of picocyanobacteria in Barguzin Bay, Lake Baikal

Cited by 11 publications

References 37 publications

Distribution of microbial populations and their relationship with environmental variables in the North Yellow Sea, China

Distribution of microbial populations and their relationship with environmental variables in the North Yellow Sea, China

Spatio-temporal niche partitioning of closely related picocyanobacteria clades and phycocyanin pigment types in Lake Constance (Germany)

Comparison of the Seasonal Variations of Synechococcus Assemblage Structures in Estuarine Waters and Coastal Waters of Hong Kong

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