Productivity of algal picoplankton in a small meromictic lake

Craig, Susan R.

doi:10.1080/03680770.1983.11897314

Cited by 20 publications

(32 citation statements)

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“…The relative abundance of these cells in Llyn Padarn are similar to those reported from the Laurentian Great Lakes (Sicko-Goad & Stoermer, 1984;Caron, Pick & Lean, 1985;Fahnensteil et al, 1986). Considerably higher numbers of these microorganisms have been reported at the chemocline of meromictic lakes (Craig, 1984(Craig, , 1987. In the oceans concentrations of these cells vary from 102 cells ml -~ in oligotrophic regions (Li et al, 1983;Platt, Subba Rao & Irwin, 1983) to 105 cells ml -I in eutrophic coastal areas (Joint & Pomroy, 1984;Murphy & Haugen, 1985).…”

Section: Discussionsupporting

confidence: 69%

“…However, these were mostly incidental to the main investigations which were concerned with the significance and contribution of nanoplankton (2-20 lam) to phytoplankton assemblages (Votintsev, Meshceryakova & Popovskaya, 1972;Happey-Wood, 1976;Paerl & Mackenzie, 1977;Munawar et al, 1978;Munawar & Fahnensteil, 1982;Priddle & Happey-Wood, 1983). Following the recognition of the importance of autotrophic picoplankton in marine ecosystems, recent freshwater studies have also concentrated on the picoplankton as a discrete component of the phytoplankton (Craig, 1984(Craig, , 1985(Craig, , 1987Caron, Pick & Lean, 1985;Fahnensteil et al, 1986). This paper presents a detailed investigation from October 1985 to September 1987 into the seasonal and vertical distribution of heterotrophic and autotrophic picoplankton in Llyn Padarn, Gwynedd, UK.…”

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confidence: 99%

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Seasonal and vertical distribution of picoplankton in Llyn Padarn, Gwynedd

Kennaway¹,

Edwards²

1989

British Phycological Journal

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Section: Discussionsupporting

confidence: 69%

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confidence: 99%

Seasonal and vertical distribution of picoplankton in Llyn Padarn, Gwynedd

Kennaway¹,

Edwards²

1989

British Phycological Journal

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“…Craig (1984) also reported that 24-97 ~ of the photoassimilation of 14C-bicarbonate was found in the <3-gm fraction in a Canadian oligotrophic lake.…”

Section: In~oducfionmentioning

confidence: 92%

The seasonal abundance and vertical distribution of the <3‐μm phytoplakton in the north basin of Lake Biwa

Nagata

1986

Ecological Research

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The seasonal changes in the size-fractionated chlorophyll a concentrations (<3 I~m, 3 to 25 ~tm, and >25 ~tm) were investigated at a pelagic site of the north basin of Lake Biwa during June to December 1985. Autofluorescing plankton cells in the <3-1am fractions were also examined using the fluorescein isothiocyanate staining epifluorescence microscopic technique. The < 3-~tm phytoplankton (usually dominated by chroococcoid cyanobacteria except for a few cases dominated by small eukaryotes)showed a clearly different pattern of seasonal change compared with the larger fractions. That is, from August to early September, chlorophyll a of the larger fractions declined considerably, while the <3-1am chlorophyll a did not decrease significantly. Moreover, cyanobacterial cell density in the <34tm fraction showed a maximum value (2--3.5 • 10~cells'm1-1) during this period. The relative contribution of the <3-gm chlorophyll a to the total chlorophyll a increased from <5 ~ to 45 % during the course of this change. No clear vertical trend in the distribution and composition of the <3-1~m phytoplankton was found, except that relatively large cyanobacteria (>4 ~tm 3) appeared at a depth of 15 m but not at 0, 5 and 10 m from late July to August. These large cells were also found in November and December. The drastic seasonal change of phytoplankton size structure occurring in this basin was discussed in relation to grazing, nutrient depletion and sinking.

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“…Seasonal dynamics of marine and freshwater autotrophic picoplankton (APP) have been reported by several studies (CRAIG, 1984;WEISSE, 1988;STOCKNER, 1991;PICK and AGBETI, 1991;OCHS and RHEW, 1997;MALINSKY-RUSHANSKY et al, 1997;HEPPERLE and KRIENITZ, 2001;JASSER and ARVOLA, 2003), but the factors that regulate their abundance are little known. According to the latest results it seems there is a general trend in the autotrophic picoplankton (APP) dynamics: in the majority of temperate lakes having different depth and trophic state they showed a biphasic distribution.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Dynamics of Picocyanobacteria and Picoeukaryotes in a Large Shallow Lake (Lake Balaton, Hungary)

Mózes

Présing

Vörös

2006

International Review of Hydrobiology

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The abundance and composition of autotrophic picoplankton (APP) were studied between February 2003 and March 2004 in Lake Balaton. Water samples were taken fortnightly in the eutrophic western basin and mesotrophic eastern basin. Our study, which took more than one year, revealed pronounced seasonal pattern of the picoplankton abundance and composition. According to our results there were three types of picoplankton in Lake Balaton: 1. Phycoerythrin-rich coccoid cyanobacteria (PE), dominant summer picoplankters in the mesotrophic lake area; 2. Phycocyanin-rich cyanobacteria (PC), the most abundant summer picoplankters in the eutrophic lake area; 3. Picoeukaryotes, dominant winter picoplankters in the whole lake. The observed abundance of picoeukaryotes (3 × 10 5 cells ml -1 ) was one of the highest ever found. Our study confirms that in Lake Balaton the colonial autotrophic picoplankton (colonial APP) become dominant in summer in the nutrient limited period. We have found strong negative relationship between the concentrations of available nitrogen forms and the colonial APP abundance. IntroductionSeasonal dynamics of marine and freshwater autotrophic picoplankton (APP) have been reported by several studies (CRAIG, 1984;WEISSE, 1988;STOCKNER, 1991;PICK and AGBETI, 1991;OCHS and RHEW, 1997;MALINSKY-RUSHANSKY et al., 1997;HEPPERLE and KRIENITZ, 2001;JASSER and ARVOLA, 2003), but the factors that regulate their abundance are little known. According to the latest results it seems there is a general trend in the autotrophic picoplankton (APP) dynamics: in the majority of temperate lakes having different depth and trophic state they showed a biphasic distribution.In a four-year study in the meso-to eutrophic Lake Constance WEISSE and KENTER (1991) found that in spring the autotrophic picoplankton (APP) abundance increased with the water temperature until the abundance reached the first maximum in April. Later in May it significantly decreased, and the second peak appeared in late summer, in August. The results reported by CALLIERI and PINOLINI (1995) from the subalpine Lake Maggiore were similar to the results obtained by WEISSE and KENTER (1991). They noticed that the first peak was in April, but the second was later, in late autumn-winter. The seasonality of autotrophic picoplankton (APP) in the shallow and dystrophic Lake Flosek (JASSER, 1997) was biphasic Internat. Rev. Hydrobiol.

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Productivity of algal picoplankton in a small meromictic lake

Cited by 20 publications

References 12 publications

Seasonal and vertical distribution of picoplankton in Llyn Padarn, Gwynedd

Seasonal and vertical distribution of picoplankton in Llyn Padarn, Gwynedd

The seasonal abundance and vertical distribution of the <3‐μm phytoplakton in the north basin of Lake Biwa

Seasonal Dynamics of Picocyanobacteria and Picoeukaryotes in a Large Shallow Lake (Lake Balaton, Hungary)

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