The winter dark survival of an algal flagellate — <i>Cryptomonas erosa</i> (Skuja)

Morgan, Keith C.; Kalff, Jacob

doi:10.1080/03680770.1974.11896371

Cited by 19 publications

(27 citation statements)

References 6 publications

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“…Unfortunately, no data are available about C. phaseolus itself, but the values found for other Cryptomonas can be used for comparison. Doubling times in laboratory cultures range between 1 and 65 d depending on light and nutrient conditions (Cloern 1977;Morgan and Kalff 1975;Lichtle 1979), and a similar range has been found in the field (Morgan and Kalff 1979;Eloranta 1980;Braunwarth and Sommer 1985). When we consider that, if anything, our values are underestimates of growth rate (and overestimates of doubling time), the range found (7-50 d) fits well within ranges in the literature.…”

Section: Discussionmentioning

confidence: 99%

“…This sort of dynamic equilibrium had been proposed for other algae forming metalimnetic blooms, such as Chrysosphaerella longispina in Jacks Lake, Ontario (Pick 1984), as well as for epilimnetic phytoplankton in tropical lakes (Hecky and Fee 198 1). Other workers have suggested different situations for metalimnetic blooms.…”

Section: Discussionmentioning

confidence: 99%

“…Fee ( 1976) and others thought the populations were actively growing and forming the bloom in situ. Pick (1984;Pick et al 1984) suggested that loss factors balanced production and, therefore, that metalimnetic blooms would be at a sort of dynamic equilibrium, but no data supporting such views were gathered. We tried to determine which of these hypotheses was correct for the metalimnetic population studied.…”

mentioning

confidence: 99%

“…Metalimnetic blooms of various phytoplankton species have been found in many lakes Fee 1976;Konopka 1982;Pick et al 1984). However, there is still little knowledge about their physiology and ecology.…”

mentioning

confidence: 99%

“…Laboratory studies have been performed on several aspects of their physiology (Morgan and Kalff 1979;Cloern 1977;Lichtle 1979). Some autecological studies have been carried out recently (Morgan and Kalff 1975;Sommer 1982;Taylor and Wetzel 1984;% Braunwarth and Sommer 1985). One frequently cited aspect is their apparent resistance to sedimentation (Burns and Rosa 1980;Livingstone and Reynolds 198 1;Sommer 1984;Reynolds 1984).…”

mentioning

confidence: 99%

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On the ecology of a Cryptomonas phaseolus population forming a metalimnetic bloom in Lake Cisó, Spain: Annual distribution and loss factors1

Pedrós-Alió

Gasol

Guerrero

1987

Limnology & Oceanography

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Cryptomonas phaseolus was present throughout the water column during holomixis in Lake Ciso (Spain), despite the presence of sulfide. During stratification, C. phaseolus formed a layer with abundances up to lo5 cells ml-I at the metalimnion, where oxygen and sulfide were present simultaneously at low concentrations. Light at this depth was between 1 and 20% of surface incident radiation. Loss factors were studied during 2 years. Outwash was negligible most of the year, but could reach 30% of total losses during certain short periods in winter. Cryptomonas phaseolus was found to sink with speeds up to 55 cm d-l, which is in accord with velocities calculated with Stokes' law. There was a single sedimentation peak in spring accounting for 40-60% of total losses. Decomposition was the most important loss factor for most of the year. Cryptomonas phaseolus cells were always actively growing, but losses balanced production for most of the study period. Average cell volume increased during mixing and decreased during stratification. Doubling times were minimal (7 d) in March at the onset of stratification and slowly increased through spring and summer, reaching a maximum just before mixing (around 50 d) and decreasing again through winter until the next March minimum.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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On the ecology of a Cryptomonas phaseolus population forming a metalimnetic bloom in Lake Cisó, Spain: Annual distribution and loss factors1

Pedrós-Alió

Gasol

Guerrero

1987

Limnology & Oceanography

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The Physico‐Chemical and Planktonic Response of an Algicide — Treated Shallow Mountain Lake in Arizona

Schwartz

Blinn

Johnson³

1981

Intl Review of Hydrobiology

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The physico-chemical and planktonic response and recovery of a shallow mountain lake in Arizona was closely monitored for a 2i/, year period following treatment with an algicide. The influential role blue-green algal blooms exert on seasonal and annual lake dynamics was most obvious once nuisance populations were temporarily removed from the system. Differential sensitivity between algal species was observed. Cryptomonad flagellates were least sensitive to algicide treatment and were dominant during periods when dissolved organic mat,erials appeared t o increase. The effect of rotenone application on blue-green bloom species is discussed.

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Annual cycle of phytoplankton in Ace Lake, an ice covered, saline meromictic lake

Burch

1988

Hydrobiologia

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The annual cycle of phytoplankton in saline, meromictic Ace Lake (68°28.4'S,78"11.1'E) in the Vestfold Hills, Antarctica, was studied from January, 1979 to January 1980. Ace Lake has permanent gradients of temperature, salinity, dissolved oxygen, and hydrogen sulphide, and is ice covered with up to 2 m of ice for lo-12 months each year. The phytoplankton community had low diversity, consisting of only four species, all flagellatesa prasinophyte PyramimonasgelidicolaMcFadden et al., a cryptophyte of the genus Cryptomonas, an unidentified colourless microflagellate, and an unarmoured dinoflagellate. These were restricted to the oxic zone of the lake from the surface to 10 m.The phytoplankton had a cycle of seven months of active growth over spring and summer. Low numbers of cells survived in the water column over winter. Spring growth was initiated below the ice by increased light penetration through the ice into the lake, enhanced at the time by the removal of surface snow which accumulated on the ice over winter. Peak phytoplankton biomass production was by the shade adapted l? gelidicola and occurred at the interface of the oxic and anoxic zones where substantial available nitrogen as ammonia is found.The three dominant phytoplankton species displayed distinct vertical stratification over the oxic zone. This stratification was not static and developed over spring as the flagellates migrated to preferred light climate zones. Mean cell volume of two of the flagellates varied significantly over the year. Minimum volumes were recorded in winter and volume increased progressively over spring to reach maximum mean cell volume in summer. Mean cell volume was positively correlated with light intensity (maximum ambient PAR at the respective depth for date of sample). Low cell volume in winter may be related to winter utilization of carbohydrate reserves by slow respiration, and may represent a survival mechanism.

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The winter dark survival of an algal flagellate — Cryptomonas erosa (Skuja)

Cited by 19 publications

References 6 publications

On the ecology of a Cryptomonas phaseolus population forming a metalimnetic bloom in Lake Cisó, Spain: Annual distribution and loss factors1

On the ecology of a Cryptomonas phaseolus population forming a metalimnetic bloom in Lake Cisó, Spain: Annual distribution and loss factors1

The Physico‐Chemical and Planktonic Response of an Algicide — Treated Shallow Mountain Lake in Arizona

Annual cycle of phytoplankton in Ace Lake, an ice covered, saline meromictic lake

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