Phytoplankton Photosynthesis in Southern Lake Baikal: Size-Fractionated Chlorophyll a and Photosynthetic Parameters

Back, Richard C.; Bolgrien, David W.; Guselnikova, Nina E.; Бондаренко, Н. А.

doi:10.1016/s0380-1330(91)71356-7

Cited by 23 publications

(14 citation statements)

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“…These data confirm and add to previous results obtained in Lake Baikal. Votintsev et al (1972) and Back et al (1991) found that the Ͻ10-µm fraction accounted for 60%-100% of total production during the warm season (July-October). Nagata et al (1994) reported that 80% of total primary production was attributable to phytoplankton in the Ͻ3-µm fraction in late July.…”

Section: Discussionmentioning

confidence: 99%

“…4). These data suggest that This study a Oxygen production rate was converted to carbon production assuming a photosynthetic quotient of 1.2 (Wetzel and Likens 2000) b PP data represent either a single measurement or a range of multiple measurements c References: (1) Back et al 1991; (2) Bondarenko and Guselnikova 1989a; (3) Bul'on 1983; (4) Goldman et al 1996;(5) Kozhova 1987;(6) Votintsev et al 1975 nano-and picophytoplankton played an important role in organic carbon cycling throughout the studied years in Lake Baikal. The dominance of small algae in primary production in Lake Baikal is consistent with data obtained from other large lakes (e.g., Lake Superior; Fahnenstiel et al 1986) and oligotrophic open oceans (e.g., the subarctic Pacific; Miller et al 1991).…”

Section: Discussionmentioning

confidence: 99%

“…These studies have revealed clear seasonal patterns in the dynamics of phytoplankton, which are characterized by a periodical bloom of diatoms and/or dinoflagellates under the condition of ice cover in early spring (Antipova 1963;Kozhova 1987) and by a massive propagation of picocyanobacteria in summer (e.g., Bondarenko and Guselnikova 1989b;Boraas et al 1991;Nagata et al 1994). Primary production of phytoplankton has been measured since the 1960s by the use of oxygen change and 14 C-tracer methods (Moskalenko and Votintsev 1972;Votintsev et al 1975;Bul'on 1983;Kozhova 1987;Bondarenko and Guselnikova 1989a;Back et al 1991;Goldman et al 1996). Based on particular previous data on primary production and estimates of deep water renewal and oxygen consumption, Weiss et al (1991) suggested that the pelagic ecosystem of Lake Baikal resembles that of oligotrophic open oceans, characterized by intensive recycling of nutrients within the upper water column (Eppley and Peterson 1979).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal dynamics of primary production in the pelagic zone of southern Lake Baikal

et al. 2003

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We measured primary production by phytoplankton in the south basin of Lake Baikal, Russia, by in situ 13 Cbicarbonate incubations within the period March-October in two consecutive years (1999 and 2000). Primary production was highest in the subsurface layer, possibly due to near-surface photoinhibition of photosynthesis, even under 0.8 m of ice cover in March. Areal primary production varied from 79 mg C m Ϫ2 day Ϫ1 (March) to 424 mg C m Ϫ2 day Ϫ1 (August), and annual primary production was roughly estimated as 75 g C m Ϫ2 year Ϫ1 , both of which are within the lower range of previous estimates. Size fractionation measurements revealed that phytoplankton in the Ͻ20 µm fraction accounted for 72%, 96%, and 85% of total primary production in March, August, and October, respectively. The contribution of picophytoplankton (Ͻ2 µm) to total primary production ranged from 41% to 62%. A large fraction (82%-98%) of particulate organic carbon was associated with particles in the Ͻ20 µm fraction. These results suggest that nano-and picophytoplankton play an important role as primary producers in the pelagic ecosystem of Lake Baikal.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal dynamics of primary production in the pelagic zone of southern Lake Baikal

et al. 2003

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“…A constant temperature block (the photosythetron, Back et al 1991) connected to a circulating water bath was used for all incubations (shelf stations, 16ЊC; Gulf Stream stations, 25ЊC).…”

Section: Biological and Chemical Parameters-chl Amentioning

confidence: 99%

Biological and isotopic changes in coastal waters induced by Hurricane Gordon

Fogel

Aguilar

Cuhel

et al. 1999

Limnology & Oceanography

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The effects of a major storm event (Hurricane Gordon) on the biogeochemistry of Atlantic coastal and Gulf Stream waters were investigated during a research cruise in November 1994. Prestorm, NH , NO , and PO ϩ Ϫ Ϫ 3 4 3 4concentrations were consistently well below 1 M, whereas after the storm, nutrient concentrations were higher in the surface-water samples: Ͼ2 M, in some instances. Primary and secondary (bacterial) production were stimulated by factors of 5 and 2, respectively, up to 4 d following the storm. Bioassay experiments showed that additions of inorganic N stimulated chlorophyll a (Chl a) concentrations, 14 CO 2 fixation, and stable isotope fractionations both before and after the storm, but the addition of phosphate had a greater impact in post-storm experiments. The ␦ 15 N of particulate nitrogen (PN) varied from ϩ5 to ϩ1.5‰ before Gordon, then afterward attained a consistent value of ϩ3.0‰. Sedimentary organic ␦ 15 N values were similar to water-column organic N, and the ␦ 15 N of dissolved NH from surface sediments (ϩ4.0‰) almost matched the ␦ 15 N of water-column particulates. These results indicate ϩ 4 that storm-generated winds mixed sediments along with dissolved nutrients into surface waters, which supported a rapid increase in water-column primary production.Interactions between atmospheric processes and primary production in the world's oceans are striking during and after major storm events over continental shelf regions. N, a lim- AcknowledgmentsWe thank Malia Go for technical assistance with the nutrient analysis. Special thanks to the crew of the RV Cape Hatteras for their competent assistance before, during, and after the storm. This work was funded by an NSF grant (Ecosystems and Biological Oceanography; [DEB 9210495]) to M.L.F. and H.W.P. We thank George Cody, Mark Teece, and Jennifer Blank for helpful reviews.

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“…Previous studies have demonstrated that planktonic primary production in Lake Baikal is the highest during summer (Kozhova 1987), and that phytoplankton smaller than 10 µm are responsible for a significant proportion (60%-100%) of total primary production in the epilimnion (Votinsev et al 1972;Popovskaya 1979;Bondarenko and Guselnikova 1989;Back et al 1991;Nagata et al 1994). It has recently been shown using epifluorescent microscopy that phytoplankton smaller than 2 µm, i.e., picophytoplankton, such as Synechococcus (Cyanophyceae), are the most important primary producers (Boraas et al 1991;Nagata et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Vertical planktonic structure in the central basin of Lake Baikal in summer 1999, with special reference to the microbial food web

et al. 2003

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Planktonic microbial interactions in the central basin of Lake Baikal were examined on a summer day in 1999. The subsurface maxima of bacterial abundance and chlorophyll concentration were recorded at the same depth, whereas the vertical distribution of heterotrophic nanoflagellates was the inverse of those of bacteria and picophytoplankton. Release of extracellular organic carbon (EOC) from phytoplankton was estimated by the NaH 14 CO 3 method as 2.4 µg Cl Ϫ1 day Ϫ1 . Bacterial production (4.3 µg Cl Ϫ1 day Ϫ1 ), estimated in a bottle incubation experiment using size-fractionated water samples, exceeded the EOC released. Thus, other supplying sources of organic matter are needed for the bacterial production. Grazing (2.6 µg C l Ϫ1 day Ϫ1 ) was also estimated in the experiment and accounted for 60% of the bacterial production. This is the first report on the microbial food web in the central basin of Lake Baikal.

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Phytoplankton Photosynthesis in Southern Lake Baikal: Size-Fractionated Chlorophyll a and Photosynthetic Parameters

Cited by 23 publications

References 11 publications

Seasonal dynamics of primary production in the pelagic zone of southern Lake Baikal

Seasonal dynamics of primary production in the pelagic zone of southern Lake Baikal

Biological and isotopic changes in coastal waters induced by Hurricane Gordon

Vertical planktonic structure in the central basin of Lake Baikal in summer 1999, with special reference to the microbial food web

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