Seasonal photosynthetic activity of autotrophic picoplankton in Lake Kinneret, Israel

Malinsky-Rushansky, Nehama; Berman, T.; Dubinsky, Zvy

doi:10.1093/plankt/19.8.979

Cited by 20 publications

(10 citation statements)

References 33 publications

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“…Autotrophic picocyanobacteria (APP) are present throughout the epilimnion and the thermocline, but are scarce at the chemocline. The presence of APP in deep layers of stagnant lakes is not unusual, since these populations often have a higher photosynthetic efficiency compared to epilimnetic phytoplankton (Vila et al, 1996;Malinsky-Rushansky et al, 1997), although in Lake Cadagno the contribution of APP to the deep chlorophyll maximum was negligible. In contrast, a dense population of diatoms, which were not present in the epilimnion, was found in the upper chemocline.…”

Section: Discussionmentioning

confidence: 99%

Microbial microstratification, inorganic carbon photoassimilation and dark carbon fixation at the chemocline of the meromictic Lake Cadagno (Switzerland) and its relevance to the food web

et al. 2001

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The microstratification of the microbial community at the chemocline of Lake Cadagno and the associated inorganic carbon fixation activity was studied by fine layer sampling. A deep chlorophyll maximum caused by diatoms overlying Cryptomonas was found at the upper edge of the chemocline. A high population density of phototrophic sulphur bacteria, mainly Amoebobacter cf. purpureus, occurred closely below the oxic-anoxic boundary. Despite the small fraction of total lake volume represented by the chemocline, half of the total carbon photoassimilation of the lake occurred within the chemocline with approximately equal contributions by oxygenic and anoxygenic phototrophs. Rates of dark carbon fixation in the chemocline were even higher than rates of photoassimilation, especially at the depths where oxygen and sulphide coexisted during part of the day. These results indicate a substantial contribution by chemolithotrophic organisms to the carbon cycle in Lake Cadagno. Analysis of stable carbon isotopes suggests that zooplankton may obtain as much as half of its carbon at the chemocline, indicating a strong link between production in anoxic waters and the food web in the oxic part of the lake.

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Section: Discussionmentioning

confidence: 99%

Microbial microstratification, inorganic carbon photoassimilation and dark carbon fixation at the chemocline of the meromictic Lake Cadagno (Switzerland) and its relevance to the food web

et al. 2001

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“…Yet the specific photophysiology of natural picophytoplankton communities has seldom been addressed over a complete annual cycle, in either marine (Joint & Pomroy 1986) or freshwater ecosystems (Malinsky-Rushansky et al 1997). In addition to providing the parameters needed for estimating primary production rates from chlorophyll a (chl a) standing stocks and the light field distribution, the study of the photosynthesis-irradiance (P-E) relationships can highlight ecophysiological responses to environmental factors, such as nutrient status or water-column stability (Lewis et al 1984).…”

Section: Abstract: Picophytoplankton · Photosynthetic Parameters · Pmentioning

confidence: 99%

Annual cycle of picophytoplankton photosynthesis and growth rates in a temperate coastal ecosystem: a major contribution to carbon fluxes

Morán¹

2007

Aquat. Microb. Ecol.

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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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Seasonal photosynthetic activity of autotrophic picoplankton in Lake Kinneret, Israel

Cited by 20 publications

References 33 publications

Microbial microstratification, inorganic carbon photoassimilation and dark carbon fixation at the chemocline of the meromictic Lake Cadagno (Switzerland) and its relevance to the food web

Microbial microstratification, inorganic carbon photoassimilation and dark carbon fixation at the chemocline of the meromictic Lake Cadagno (Switzerland) and its relevance to the food web

Annual cycle of picophytoplankton photosynthesis and growth rates in a temperate coastal ecosystem: a major contribution to carbon fluxes

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

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