An introduction to the limnology of the Friesian lakes

Beattie, D. M.; Golterman, H. L.; Vijverberg, J.

doi:10.1007/bf00018895

Cited by 83 publications

(37 citation statements)

References 14 publications

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“…Ca 200 ml of algal suspension of both S. obliquus and C. globosa were harvested daily from the `surplus' bottles, centrifuged twice for 20 minutes at 3000 r.p.m ., and rinsed with distilled water. The algae were resuspended in 0.45 am filtered lake water from Tjeukemeer, a shallow eutrophic lake in the northern part of the Netherlands (Beattie et al, 1979) . Using a haemocytometer, a minimum of 500 cells were counted to determine the concentration .…”

Section: Methodsmentioning

confidence: 99%

Possible toxic effects on Daphnia resulting from the green alga Scenedesmus obliquus

Boersma

Vijverberg

1994

Hydrobiologia

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Section: Methodsmentioning

confidence: 99%

Possible toxic effects on Daphnia resulting from the green alga Scenedesmus obliquus

Boersma

Vijverberg

1994

Hydrobiologia

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“…Interstitial water was prepared by centrifugation (3500 rpm, 15 min) according to Degobbis et al (1986), and all water samples (including surface and interstitial water) were filtered through pre-washed 0.45-μm filters to analyze soluble reactive phosphorus (SRP) from surface water and interstitial water according to the molybdate blue method (Murphy and Riley 1962). TP and dissolved total phosphorus (DTP) were determined following digestion according to Beattie et al (1978). Chl a was Fig.…”

Section: Chemical Analysismentioning

confidence: 99%

Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China)

Wang

Xiao

et al. 2016

Environ Sci Pollut Res

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Tunnel construction in watershed area of urban lakes would accelerate eutrophication by inputting nutrients into them, while mechanisms underlying the internal phosphorus cycling as affected by construction events are scarcely studied. Focusing on two main pathways of phosphorus releasing from sediment (enzymatic mineralization and anaerobic desorption), spatial and temporal variations in phosphorus fractionation, and activities of extracellular enzymes (alkaline phosphatase, β-1,4-glucosidase, leucine aminopeptidase, dehydrogenase, lipase) in sediment were examined, together with relevant parameters in interstitial and surface waters in a Chinese urban lake (Lake Donghu) where a subaqueous tunnel was constructed across it from October 2013 to July 2014. Higher alkaline phosphatase activity (APA) indicated phosphorus deficiency for phytoplankton, as illustrated by a significantly negative relationship between APA and concentration of dissolved total phosphorus (DTP). Noticeably, in the construction area, APAs in both sediment and surface water were significantly lower than those in other relevant basins, suggesting a phosphorus supply from some sources in this area. In parallel, its sediment gave the significantly lower iron-bound phosphorus (Fe(OOH)∼P) content, coupled with significantly higher ratio of iron (II) to total iron content (Fe 2+ / TFe) and dehydrogenase activities (DHA). Contrastingly, difference in the activities of sediment hydrolases was not significant between the construction area and other basins studied. Thus, in the construction area, subsidy of bioavailable phosphorus from sediment to surface water was attributable to the anaerobic desorption of Fe(OOH)∼P rather than enzymatic mineralization. Finally, there existed a significantly positive relationship between chlorophyll a concentration in surface water and Fe(OOH)∼P content in sediment. In short, construction activities within lakes may interrupt cycling patterns of phosphorus across sediment-water interface by enhancing release of redox-sensitive phosphate, and thereby facilitating phytoplankton growth in water column.

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“…The littoral zone is poorly developed: the index of shoreline development (D,) is 1.25 (Hutchinson, 1957). Tjeukemeer is part of an interconnected system of water bodies (the Frisian 'boezem') which act as water reservoirs for the surrounding polders (Beattie et al, 1978). The replacement time of the water in the lake is 3-6 months.…”

Section: Introductionmentioning

confidence: 99%

The accuracy of population density estimates of copepods and cladocerans, using data from Tjeukemeer (the Netherlands) as an example

Nie¹,

Vijverberg²

1985

Hydrobiologia

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The effects of subsampling and of the variation within and among sampling stations on the accuracy of the estimates of mean population densities for copepods and cladocerans are examined. For the computation of the coefficient of variation in the mean, the sample variance of log transformed data is appropriate. Accuracy is primarily influenced by variation between sampling stations and to a lesser extent by the variation within a sampling station, while subsampling variation has only a minor effect on the accuracy as long as more than 25 individuals per subsample are counted.

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An introduction to the limnology of the Friesian lakes

Cited by 83 publications

References 14 publications

Possible toxic effects on Daphnia resulting from the green alga Scenedesmus obliquus

Possible toxic effects on Daphnia resulting from the green alga Scenedesmus obliquus

Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China)

The accuracy of population density estimates of copepods and cladocerans, using data from Tjeukemeer (the Netherlands) as an example

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