Limnologische Untersuchungen am Hauptbecken der Saidenbach‐Talsperre

Beuschold, Erhard

doi:10.1002/iroh.19610460104

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…The stratification period usually lasts from April/May until October/November. The concentration of carbonate ions is low (0.3 m m ) (Beuschold, 1961), characterising Saidenbach Reservoir as a soft water lake without calcite precipitation.…”

Section: Methodsmentioning

confidence: 99%

Effects of zooplankton dynamics on epilimnetic phosphorus loss

et al. 2012

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1. Our aim was to analyse the impact of zooplankton dynamics on the relative importance of two mechanisms contributing to the loss of phosphorus (P) from the epilimnion of stratified lakes: net population incorporation into zooplankton biomass and P sedimentation. 2. We established enclosures without Daphnia (control), with a growing Daphnia population (treatment D) and with a high, stable Daphnia population (treatment D+). The P incorporated in zooplankton biomass and sedimented was measured at short intervals over a period of 17 days. 3. In both Daphnia treatments, sedimentation increased and the P content of sedimented matter was higher than in the control and highest in D+. The P loss by sedimentation between day 3 and 17 was generally high (>25%, >1.8% day )1 ) with particularly high values in D+ (60%, 4.3% day )1 ). Phosphorus sedimentation was higher in the zooplankton treatments, although the contribution of exuviae and dead Daphnia was minor. Faecal material was probably a major component of sedimentation. 4. By contrast, the amount of P in zooplankton (mainly Daphnia) biomass increased in D but remained constant in D+. Phosphorus loss owing to net population incorporation was generally low and ranged up to 6.5% (0.5% day )1 ) in treatment D. A positive relationship between Daphnia dry mass and P sedimentation, as well as P incorporation, was found. 5. Sedimentation is evidently an important cause of P loss from the epilimnion where Daphnia is abundant. By contrast, P incorporation into Daphnia biomass may only become an important loss factor when the population is growing.

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Section: Methodsmentioning

confidence: 99%

Effects of zooplankton dynamics on epilimnetic phosphorus loss

et al. 2012

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“…After 1959, man-made lakes became increasingly important as subjects of fundamental limnological research (an equivalent in the field of Oceanography fortunately does not exist). It became evident that the analysis of their biota was not less informative than that of natural water bodies, e.g., BEUSCHOLD (1961). This builds a bridge to the late editor MILAN STRAŚKRABA, who launched a special issue on "Reservoir Limnology and Water Quality" in 1998.…”

Section: The Period From 1959 To 1989mentioning

confidence: 94%

The Centenary of the International Review of Hydrobiology From Documentation of Single Plankton and Benthos Phenomena to Community Metabolism and Use of Molecular Probes

Uhlmann¹,

Walz²

2008

International Review of Hydrobiology

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The "Internationale Revue der gesamten Hydrobiologie und Hydrographie" was founded in 1908 by RICHARD WOLTERECK. That journal was one of the two oldest hydrobiological periodicals in the world. The aim of the journal was to serve as a synthesis of disciplinary studies. The journal had an eventful history which can be divided into 3 periods from 1908-1944, 1959-1989, and 1989-2008. In 1998 the title was modified slightly to "International Review of Hydrobiology". Throughout its history, this hydrobiological journal dealt with aquatic organisms and covered many aspects of Limnology and Marine Biology where they were relevant to an ecological understanding. Die Wissenschaft von heute ist der Irrtum von morgen1

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“…SR was completed in 1933 and is located in a populated and mainly agricultural catchment area. There was awareness from the very beginning of the danger of elevated nutrient loading and with that in mind, first detailed scientific investigations were carried out in the 1950's (Beuschold, ; Klapper, ; Rudolf, ). Hofmann () revealed the significance of phosphorus for the water quality and made clear that SR was facing serious eutrophication.…”

Section: Introductionmentioning

confidence: 99%

Climate change impeded the re-oligotrophication of the Saidenbach Reservoir

Horn

Paul

Hörn

et al. 2015

Internat. Rev. Hydrobiol.

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Regular ecological investigations usually on a fortnightly basis have been carried out at the Saidenbach Reservoir (SE Germany) and its tributaries since 1975. The data show a sudden decrease in the phosphorus import of over 60% in 1990, resulting in the abrupt change of the trophic state from eutrophic to weakly mesotrophic. Contrary to expectations, the average annual phytoplankton abundance did not decrease but almost doubled on average over the years after 1990. This was primarily due to mostly warmer winters after 1990 causing longer spring overturns, which minimized sedimentation losses, enabled better utilization of the phosphorus reserves, and resulted in higher yields of the diatom‐dominated phytoplankton spring mass development. In the summers after 1990, the mass growth of the diatom Fragilaria crotonensis, which in the past used to dominate in this season and effectively transported phosphorus to the sediment by settling, was considerably reduced because of lower P supply and stronger stratification. However, the decrease in the biomass of Fragilaria was overcompensated by the increased abundance of cyanobacteria. They benefitted not only from declining phosphorus competition by Fragilaria but also from higher thermal stability and temperature in the epilimnion. Hence, even higher summer biomasses were observed despite considerably lowered phosphorus import. The analysis of the long‐term dataset clearly illustrates the deciding impact of hydrophysical factors on the phytoplankton growth, also under nutrient deficient conditions. The altered mixing and stratification pattern caused by climate change did not only prevent the re‐oligotrophication of the reservoir but even enhanced the phytoplankton production. It seems that global warming modifies the interplay between physical and nutrient limitation mechanisms and the limits and models used in the past to classify trophic‐state levels have to be verified. The study shows the enormous significance and indispensability of uninterrupted ecological long‐term datasets, including reliable data of the ecosystem's organismic structure, for research about the consequences of climate change.

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Limnologische Untersuchungen am Hauptbecken der Saidenbach‐Talsperre

Cited by 7 publications

References 1 publication

Effects of zooplankton dynamics on epilimnetic phosphorus loss

Effects of zooplankton dynamics on epilimnetic phosphorus loss

The Centenary of the International Review of Hydrobiology From Documentation of Single Plankton and Benthos Phenomena to Community Metabolism and Use of Molecular Probes

Climate change impeded the re-oligotrophication of the Saidenbach Reservoir

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