The Distribution of Picoplanktonic Algae.

Ichise, Satoshi; Tanaka, Katsumi; Sono, Tadashi; Wakabayashi, T.; Yamanaka, Sunao; Kaneda, Emiko; YADA, Minoru; Naito, M.; Kawabe, Koichi; Aoki, Kayo; Sanuki, Noriko; Fujiwara, Naoki; Nomura, Kiyoshi

doi:10.2331/suisan.61.932

Cited by 4 publications

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“…In Lake Biwa, blooms of photoautotrophic picoplankton have been observed in the north and south basins in summer (Nagata 1986;Ichise et al 1991Ichise et al , 1995Maeda et al 1992;Nakano et al 1996;Nagata et al 1996). At that time, the water often turns a dark brown color.…”

Section: Introductionmentioning

confidence: 94%

Urea degradation by picophytoplankton in the euphotic zone of Lake Biwa

2000

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Section: Introductionmentioning

confidence: 94%

Urea degradation by picophytoplankton in the euphotic zone of Lake Biwa

2000

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“…NAGATA et al (1994NAGATA et al ( , 1996 reported that the pico phytoplankton made an appreciable contribution to total primary production in lakes. In large Lake Biwa, the standing crop of pico phytoplankton has been investigated (NAGATA, 1986(NAGATA, , 1988ICHISE et al, 1991ICHISE et al, , 1995MAEDA et al, 1992 ;NAKANO et al, 1996). The pico phytoplankton in the lake, belongs to the Synechococcus group, composed of three different types of cyanobacteria (MAEDA et al, 1992).…”

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confidence: 99%

Seasonal Change in Photosynthetic Activity of Photoautotrophic Picoplankton in Lake Biwa.

Mitamura¹,

Maeda²,

Kawashima³

1999

Jpn. J. Limnol.

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Seasonal changes in the photosynthetic activity of pico phytoplankton and its contribution to total primary productivity in surface waters at eleven pelagic stations in the north and south basin were examined. Chlorophyll-ƒ¿ concentration of the pico phytoplankton was 0.3 to 5.7 mg chl.a m-3, and was two times higher in the south basin than in the north basin. High standing crops were observed from late July

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Seasonal variation of phototrophic picoplankton in Lake Biwa (1994?1998)

Wakabayashi

Ichise

2004

Hydrobiologia

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Seasonal abundances of phototrophic picoplankton (PP) and heterotrophic nanoflagellates in Lake Biwa were studied from 1994 to 1998. Seasonal variation in cell volume and biomass of the phototrophic picoplankton were also studied. PP were counted using disposable glass microscopic plates, which gave superior accuracy to sample filtration onto membrane filters. Phycoerythrin-rich rod-shaped cyanobacteria (PEC), one of the major components of the picoplankton community, were sparse (about 10 4 cells ml )1 ) in winter and began to increase in April. Several PEC peaks were observed during the period of thermal stratification, and a rapid fall took place after October or November. In the northern basin, PEC peaked during late June and early July in 3 of the 5 years, and in late summer in the remaining years. Phycocyaninrich rod-shaped cyanobacteria (PCC) were abundant in the southern basin and were present in smaller numbers in the eutrophic nearshore area of the northern basin; they peaked several times during the period from July to October. Seasonal variations of these two kinds of picoplankton were correlated with seasonal changes in water temperature. Phycoerythrin-rich cylinder-shaped cyanobacteria exhibited narrow peaks in July, their abundance declining as the year progressed. The density of heterotrophic nanoflagellates was greatest in early spring. Average cell volume of PEC was largest in winter, then decreased gradually to a minimum in late summer; after the fall, it recovered to the winter cell volume. This change can likely be attributed to the depletion of nitrogen in the warmer seasons.

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The Distribution of Picoplanktonic Algae.

Cited by 4 publications

References 0 publications

Urea degradation by picophytoplankton in the euphotic zone of Lake Biwa

Urea degradation by picophytoplankton in the euphotic zone of Lake Biwa

Seasonal Change in Photosynthetic Activity of Photoautotrophic Picoplankton in Lake Biwa.

Seasonal variation of phototrophic picoplankton in Lake Biwa (1994?1998)

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