Picoplankton and Other Non-Bloom-Forming Cyanobacteria in Lakes

Stockner, John G.; Callieri, Cristiana; Cronberg, Gertrud

doi:10.1007/0-306-46855-7_7

Cited by 127 publications

(179 citation statements)

References 151 publications

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“…At least 20 fields (400 cells) were photographed with a Spot RT color camera and the picoalgae were counted on these pictures to avoid the fluorescence fading. Solitary cells, loose aggregates and small colonies were all considered to be picoplanktonic organisms if the cell size was less than 2 mm according to Stockner et al (2000). Using the routine enumeration protocol for identifying picophytoplankton types, first the picophytoplankton cells were located under blue-violet excitation.…”

Section: Algological Investigationsmentioning

confidence: 99%

“…The autotrophic picoplankton is a size classification (usually defined as cells with diameter < 2 or 3 mm that are present even in single-celled or colonial forms) thus species composition can vary from lake to lake (Callieri, 2008). Except some colonial species, having cells that may approach the pico-size range and have identifiable morphological features, like the cyanobacterial genera Merismopedia, Cyanodictyon or Aphanothece (Stockner et al, 2000), the picoalgae are not identifiable by traditional microscopic methods. In Lake Fertő , only Padisa´k and Dokulil (1994) studied quantitatively the autotrophic picoplankton in the open water area based on offshore samples from the Illmitz Bay (Padisa´k and Dokulil, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Periodic picophytoplankton predominance in a large, shallow alkaline lake (Lake Fertő, Neusiedlersee)

Somogyi

Felföldi

Dinka

et al. 2010

Ann. Limnol. - Int. J. Lim.

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-The biomass and composition of the phytoplankton was studied at seven sampling stations located at different water bodies (open water, inner pond and canal) of a large, shallow turbid lake (Lake Fertő , Neusiedlersee). The open water was characterized by picocyanobacteria and meroplanktonic diatoms, the artificial canal by epiphytic diatoms, cryptophytes and chlorophytes. The inner ponds, based on the phytoplankton composition, were positioned between these water bodies. High picoplankton abundance (>10 6 cells.mL x1 ) and predominance (up to 80% contribution to the total phytoplankton biomass) were detected in the open water and the inner ponds, which was hypothesized to be the result of the turbid environment by the suppression of the top down control and by light-limitation. Information on the diversity of the picoplankton in the open water of the lake has been presented first time in this study. Based on molecular analysis (16S rRNA gene and cpcBA-IGS region) the dominant group of picocyanobacteria belonged to the Cyanobium gracile cluster (group A) of the picophytoplankton clade in April. Members of two other picocyanobacterial groups (group B and C) were also detected.

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Section: Algological Investigationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Periodic picophytoplankton predominance in a large, shallow alkaline lake (Lake Fertő, Neusiedlersee)

Somogyi

Felföldi

Dinka

et al. 2010

Ann. Limnol. - Int. J. Lim.

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“…Differences between the PAB and P treatments are statistically significant for absolute photosynthetic rates but not significant for chlorophyll a specific rates. As it is common in most lakes (Stockner et al 2000), picoplankton are less productive than nanoplankton in both lakes Lucerne and Cadagno. However photosynthetic efficiency, estimated as chlorophyll a specific photosynthetic rate, is similar or even higher (though not sta- Table 1.…”

mentioning

confidence: 97%

Photosynthetic response of pico- and nanoplanktonic algae to UVB, UVA and PAR in a high mountain lake

Callieri

Morabito

Huot³

et al. 2001

Aquat. sci.

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The objective of the present study was to evaluate the influence of UV radiation on photosynthesis rate, in situ and in laboratory incubations, on size fractionated natural algal assemblages (picoplankton: 0.2 -2µm, nanoplankton: >2µm) and whole water (total organic carbon TOC). Near surface samples from a mesotrophic high mountain lake (LCD: L. Cadagno, Swiss Alps, Switzerland, 1923 m a.s.l.) and from the oligotrophic pre-alpine L. Lucerne (LLU: Swiss Alps, Switzerland, 434 m a.s.l.) were both incubated at a depth of 30 cm (50% of surface UV at 323 nm ) in L. Cadagno. At the same time, biological weighting functions for UV inhibition of photosynthesis (BWFs) were determined for the autotrophic picoplankton and whole fraction in a spectral incubator. Photosynthetic assimilation of the pico-and nanoplanktonic algal communities as well as the assimilated total organic carbon (TOC) was estimated separately by 14 C uptake under three irradiance conditions: PAR (photosynthetically active radiation), PAR + UVA and PAR + UVA + UVB. UV radiation reduced significantly photosynthesis rate in samples from both lakes (LLU: P = 0.0012; LCD: P = 0.0001). It appears that UVA plus UVB significantly affect the algal assemblage in both lakes; however most of the effect is due to UVA (Mann Whitney U test, two tailed: P = 0.0022). The natural assemblages from LLU transplanted to LCD were more inhibited by UV than the autochthonous assemblages of LCD. Photosynthetic rates of picoplankton from LLU and LCD under full UV exposure was reduced by 73% and 55% respectively relative to PAR only. A higher sensitivity of autotrophic picoplankton to the UV radiation, with respect to the nanoplankton, was observed in the biological weighting functions. However this difference was not statistically significant for the in situ incubations.

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“…Recently, it is well known that nutrient availability, sedimentation, and grazing were considered the major driving forces of microbial and algal communities in aquatic environments (Tijdens et al, 2008). The picophytoplankton abundance and biomass increase and its relative importance decreases with the increase of trophic state in the freshwater system (Szelag-Wasielewaska, 1999;Stockner et al, 2000;Bell and Kalff, 2001;Callieri and Stockner, 2002). Light and water temperature are also two important factors controlling picophytoplankton growth (Wehr, 1993;Agawin et al, 2000;Wakabayashi and Ichise, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Compared to marine, there is less information available on freshwater picocyanobacterial biodiversity, and the factors controlling the growth, distribution and productivity (Stockner and Antia, 1986;Callieri and Stockner, 2002). Similar to marine, freshwater picocyanobacteria show high diversity with specific niche adaptation and the abundance of freshwater Synechococcus follows a seasonal pattern with a peak in spring after winter mixing and a peak late summer (Weisse, 1993;Stockner et al, 2000;Callieri and Stockner, 2002).…”

Section: Discussionmentioning

confidence: 99%

Seasonal patterns of viral, microbial and planktonic communities in Sidi Salem: a freshwater reservoir (North of Tunisia)

Romdhane

Bour

Hamza

et al. 2014

Ann. Limnol. - Int. J. Lim.

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-We investigated the distribution and dynamics of viruses, prokaryotes and small eukaryotic phytoplankton in Sidi Salem freshwater reservoir (Northern Tunisia). Samples were collected from the deepest station at different depths throughout the water column for 2 years (February 2009 to January 2011). The reservoir was characterized by seasonal alternations of thermal stratification and homothermy. Among the different microbial communities counted using flow cytometry (FCM), picocyanobacteria constituted an important autotrophic component since they were always present and their highest concentration reached 3.02 and 2.65 r 10 5 cells.mL x1 in March 2009 and June 2010, respectively. The heterotrophic prokaryotic communities (represented mainly by bacteria) were characterized by a clear separation between two subgroups referred to as high-DNA and low-DNA content populations, and the highest concentrations of heterotrophic bacteria (i.e., 3.8 r 10 7 cells.mL x1 ) were recorded in spring 2009. Several viral groups referred to as virus-like particles (VLP) groups 1, 2 and 3 could also be discriminated using FCM. VLP1 and VLP2 displayed a significant correlation with the heterotrophic bacteria (r = 0.80 and 0.78, P < 0.001) but seem to be independent from picocyanobacteria and/or chlorophyll a, suggesting these VLPs were mainly bacteriophages. At last, the virus to prokaryotic ratio could be high, especially in summer (mean = 22, max = 487), suggesting a strong coupling between bacteria and viruses, at least at certain periods of the year.

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Picoplankton and Other Non-Bloom-Forming Cyanobacteria in Lakes

Cited by 127 publications

References 151 publications

Periodic picophytoplankton predominance in a large, shallow alkaline lake (Lake Fertő, Neusiedlersee)

Periodic picophytoplankton predominance in a large, shallow alkaline lake (Lake Fertő, Neusiedlersee)

Photosynthetic response of pico- and nanoplanktonic algae to UVB, UVA and PAR in a high mountain lake

Seasonal patterns of viral, microbial and planktonic communities in Sidi Salem: a freshwater reservoir (North of Tunisia)

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