Freshwater picocyanobacteria along a trophic gradient and light quality range

Vörös, Lajos; Callieri, Cristiana; Balogh, Katalin; Bertoni, Roberto

doi:10.1007/978-94-017-2668-9_10

Cited by 101 publications

(161 citation statements)

References 7 publications

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“…Values for APP population abundances were log 10 -transformed prior to hierarchical partitioning and standard multiple linear regression analyses. TEMP = temperature (°C); TP = total phosphorus (Vörös et al 1998), particularly deeper in the water column (i.e. near or below the 1% surface light depth: Gervais et al 1997, this study).…”

Section: Population Dynamics Of Single-celled Picocyanobacteriamentioning

confidence: 87%

Flow-cytometric mapping provides novel insights into the seasonal and vertical distributions of freshwater autotrophic picoplankton

Crosbie

Teubner²,

Weisse³

2003

Aquat. Microb. Ecol.

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This is the first study using flow cytometry to characterize the population dynamics of freshwater autotrophic picoplankton (APP) over a full seasonal cycle, the goal of which was to accurately quantify and qualify the natural APP populations in relation to major environmental parameters. In particular, we wanted to test current assumptions about the seasonal succession of prokaryotic and eukaryotic picoplankton cells, including the relationship between solitary picocyanobacteria and microcolonies. Using flow cytometry, we were able to efficiently characterize the abundances of 4 lake APP assemblages in Lake Mondsee, including that of a solitary picocyanobacterial population exhibiting high 'side scatter' values. Such cells were not readily enumerated by epifluorescence microscopy. Unlike Lakes Constance and Maggiore, we found no evidence of a spring peak in solitary picocyanobacteria -we propose that the lack of a spring peak in Lake Mondsee was due to weak stratification in March-April and relatively deep vertical mixing. Since summer declines in the abundance of solitary picocyanobacteria were associated with extended periods of reduced light availability, it is likely that such declines were in part due to low relative growth rates. Finally, we argue that the formation of microcolonies by picocyanobacteria is unlikely to be a strategy for more efficient nutrient recycling (e.g. Stockner & Antia 1986). Rather, we suggest that microcolonies reach high concentrations in surface and near-surface waters due to the production of a photosynthate-rich mucilage resulting from active photosynthesis during periods of severe nutrient deficiency.

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Section: Population Dynamics Of Single-celled Picocyanobacteriamentioning

confidence: 87%

Flow-cytometric mapping provides novel insights into the seasonal and vertical distributions of freshwater autotrophic picoplankton

Crosbie

Teubner²,

Weisse³

2003

Aquat. Microb. Ecol.

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“…Information about the diversity and dynamics of picocyanobacteria in eutrophic and hypereutrophic freshwater environments is relatively sparse (Vörös et al, 1998;Hirose et al, 2003;Felföldi et al, 2009). Picocyanobacteria, a group of small autotrophic cyanobacteria with diameters ranging from approximately 0.2 to 2 µm (Raven, 1998), are ubiquitous in a variety of freshwater environments (Callieri and Stockner, 2002;Callieri, 2008) and contribute to a significant portion of total primary production .…”

Section: Introductionmentioning

confidence: 99%

Diversity and dynamics of picocyanobacteria and the bloom-forming cyanobacteria in a large shallow eutrophic lake (lake Chaohu, China)

Cai¹,

Kong²

2013

J Limnol

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“…PE-rich strains dominate in clear waters; they contain relatively high contents of the chromophore phycourobilin (PUB) in the clearest ocean waters in which blue light prevails, whereas their chromophore composition shifts towards phycoerythrobilin (PEB) in more mesotrophic marine waters characterized by blue-green light environments (Olson et al, 1990;Lantoine and Neveux, 1997;Wood et al, 1998;Scanlan, 2003). Conversely, PC-rich strains dominate in turbid inland waters in which orange and red light prevail (Pick, 1991;Vö rö s et al, 1998;Stomp et al, 2007a, b). Widespread coexistence of PE-and PC-rich picocyanobacteria can be found in waters of intermediate turbidity, such as mesotrophic lakes and coastal seas (Stomp et al, 2007a;Haverkamp et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Colorful microdiversity of Synechococcus strains (picocyanobacteria) isolated from the Baltic Sea

et al. 2008

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Synechococcus is a cosmopolitan genus of picocyanobacteria living in the photic zone of freshwater and marine ecosystems. Here, we describe the isolation of 46 closely related picocyanobacterial strains from the Baltic Sea. The isolates showed considerable variation in their cell size and pigmentation phenotypes, yielding a colorful variety of red, pink and blue-green strains. These pigmentation phenotypes could not be differentiated on the basis of their 16S rRNA-internal transcribed spacer (ITS) sequences. Thirty-nine strains, designated BSea, possessed 16S rRNA-ITS sequences almost identical with Synechococcus strain WH5701. Despite their similar 16S rRNA-ITS sequences, the BSea strains separated into several different clusters when comparing the phycocyanin (cpcBA) operon. This separation was largely consistent with the phycobiliprotein composition of the different BSea strains. The majority of phycocyanin (PC)-rich Bsea strains clustered with WH5701. Remarkably, the phycoerythrin (PE)-rich strains of BSea formed an as yet unidentified cluster within the cpcBA phylogeny, distantly related to other PE-rich groups. Detailed analysis of the cpcBA operon using neighbour-net analysis indicated that the PE-rich BSea strains are probably endemic for the Baltic Sea. Comparison of the phylogenies obtained by the 16S rRNA-ITS, the cpcBA, and the concatenated 16S rRNA-ITS and cpcBA operon sequences revealed possible events of horizontal gene transfer among different Synechococcus lineages. Our results show that microdiversity is important in Synechococcus populations and that it can reflect extensive diversification of different pigmentation phenotypes into different ecological niches.

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Freshwater picocyanobacteria along a trophic gradient and light quality range

Cited by 101 publications

References 7 publications

Flow-cytometric mapping provides novel insights into the seasonal and vertical distributions of freshwater autotrophic picoplankton

Flow-cytometric mapping provides novel insights into the seasonal and vertical distributions of freshwater autotrophic picoplankton

Diversity and dynamics of picocyanobacteria and the bloom-forming cyanobacteria in a large shallow eutrophic lake (lake Chaohu, China)

Colorful microdiversity of Synechococcus strains (picocyanobacteria) isolated from the Baltic Sea

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