Bacterio-, phyto- and zooplankton of the River Danube (Hungary)

Balogh, Katalin; Bothár, Anna; Kiss, Keve Tihamér; Vörös, Lajos

doi:10.1080/03680770.1992.11900470

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…Cyclotella meneghiniana Kutz. is one of the most frequently dominant potamoplankton in the river (V. -Balogh et al 1994). Tîie domination of diatoms is characterized by depletion of nutrients.…”

Section: Introductionmentioning

confidence: 99%

Growth ofCyclotella meneghinianaKutz. II. Growth and cell composition under different growth rates with different limiting nutrient

Shafik

Herodek

Présing

et al. 1997

Ann. Limnol. - Int. J. Lim.

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Section: Introductionmentioning

confidence: 99%

Growth ofCyclotella meneghinianaKutz. II. Growth and cell composition under different growth rates with different limiting nutrient

Shafik

Herodek

Présing

et al. 1997

Ann. Limnol. - Int. J. Lim.

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“…The minimal sample size resulted in 1,000 and 300 l of water, respectively. This sample size is beyond those applied in the studies of riverine plankton: 10 l (Illyová 2006), 20 l (De Ruyter Van Steveninck et al 1990), 25 l (Vranovsky 1991), 30 l (Saunders and Lewis 1989), 40 l (Reckendorfer et al 1999), 50 l (Gulyás 1995), 60 l (Ietswaart et al 1999), 100 l (Gulyás 1994;Maria-Heleni et al 2000) and 200 l (V. Balogh et al 1994;Bothár 1988;Bothár and Kiss 1990). Obviously, taking 1,000 l of water would mean an enormous effort, and this should not be the desired goal.…”

Section: Discussionmentioning

confidence: 98%

“…Generally, seasonal dynamics of riverine zooplankton have been discussed on the basis of samples collected at biweekly (Kim and Joo 2000;Maria-Heleni et al 2000;Reckendorfer et al 1999) or weekly intervals (Bothár 1988;Bothár and Kiss 1990;V.-Balogh et al 1994). Bothár (1996) performed zooplankton investigations in the river Danube on the daily basis and pointed out that no regular quantitative change or fluctuation in zooplankton abundance can be observed, although phytoplankton and water chemical data showed regular daily patterns.…”

Section: Discussionmentioning

confidence: 99%

Effect of sampling effort and sampling frequency on the composition of the planktonic crustacean assemblage: a case study of the river Danube

Vadadi-Fülöp

Hufnágel

Zsuga

2009

Environ Monit Assess

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Although numerous studies have focused on the seasonal dynamics of riverine zooplankton, little is known about its short-term variation. In order to examine the effects of sampling frequency and sampling effort, microcrustacean samples were collected at daily intervals between 13 June and 21 July of 2007 in a parapotamal side arm of the river Danube, Hungary. Samples were also taken at biweekly intervals from November 2006 to May 2008. After presenting the community dynamics, the effect of sampling effort was evaluated with two different methods; the minimal sample size was also estimated. We introduced a single index (potential dynamic information loss; to determine the potential loss of information when sampling frequency is reduced. The formula was calculated for the total abundance, densities of the dominant taxa, adult/larva ratios of copepods and for two different diversity measures. Results suggest that abundances may experience notable fluctuations even within 1 week, as do diversities and adult/ larva ratios.

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“…meneghiniana is one of the most frequently dominant potamoplankter in River Danube (V.-Balogh et al 1994) and in European, American and Japanese rivers ( Kiss & Nausch 1988, Murakami et al 1994. To elucidate the essential factors of the growth and decline of mass populations, we have to know the influence of basic environmental factors such as light (Knowlton & Jones 1996) and temperature.…”

Section: Introductionmentioning

confidence: 99%

Growth ofCyclotella meneghinianaKutz. I. Effects of temperature, light and low rate of nutrient supply

Shafik

Herodek

Vörös

et al. 1997

Ann. Limnol. - Int. J. Lim.

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A strain of Cyclotella meneghiniana was isolated from the River Danube. The optimum irradiance and temperature for growth were determined in batch cultures. The optimum temperature for growth was 25 °C. The estimated saturated irradiance was near 125 uE m 2 s 1 . The calculated I k for growth and photosynthesis were 30 ± 3 and 44 ± 6 uE nr 2 s 1 respectively. A continuous culture technique was used to test the growth and cell composition at the transition state between batch, nutrient sufficiency, and a low rate of nutrient supply. Algal response was characterized by high intracellular N and C with negative growth rate. At a low dilution rate (0.06 d 1 ), the continuous culture theory was not followed. This critical rate is characterized by low chlorophyll-a content per cell and may depend on the mode of nutrition.Croissance de Cyclotella meneghiniana Kutz. I. Influence de la température, de la lumière et d'un faible apport de nutriments Mots clés : Cyclotella meneghiniana, température, lumière, faible taux de croissance, composition cellulaire.Une souche de Cyclotella meneghiniana, provenant du Danube, a été isolée. La température et la lumière optimales pour la croissance ont été déterminées en culture «batch» : 25°C et 125 uEnr 2 s -1 . Ul k calculé pour la croissance et la photosynthèse était respectivement de l'ordre de 30 ± 3 et de 44 ± 6 uE nr 2 s -1 . La technique de la culture en continu a été également utilisée avec un faible apport de nutriments, correspondant à un stade en culture «batch» où les nutriments étaient encore non limitants. La réponse de la diatomée était caractérisée par un quota cellulaire de N et P élevé avec un taux de croissance négatif. Avec un faible taux de dilution (0,06 J" 1 ), la théorie de la culture en continu n'était pas vérifiée. Ce taux critique de dilution se caractéri-sait par un contenu cellulaire en chlorophylle a faible et peut dépendre du mode de nutrition.

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Bacterio-, phyto- and zooplankton of the River Danube (Hungary)

Cited by 6 publications

References 4 publications

Growth ofCyclotella meneghinianaKutz. II. Growth and cell composition under different growth rates with different limiting nutrient

Growth ofCyclotella meneghinianaKutz. II. Growth and cell composition under different growth rates with different limiting nutrient

Effect of sampling effort and sampling frequency on the composition of the planktonic crustacean assemblage: a case study of the river Danube

Growth ofCyclotella meneghinianaKutz. I. Effects of temperature, light and low rate of nutrient supply

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