Lake Müggelsee and its Environment — Natural Conditions and Anthropogenic Impacts

Driescher, E.; Behrendt, Horst; Schellenberger, Günter; Stellmacher, Rita

doi:10.1002/iroh.19930780303

Cited by 90 publications

(68 citation statements)

References 7 publications

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“…For further details on lake morphometry and the catchment area, see Driescher et al (1993). Over the last three decades of observation, the lake has been subjected to seasonal warming trends (,2.3uC during summer; Adrian et al 2006) and decreased nutrient loading beginning in the early 1990s (Kö hler et al 2005).…”

Section: Methodsmentioning

confidence: 99%

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Cyanobacteria dominance: Quantifying the effects of climate change

Wagner

Adrian

2009

Limnology & Oceanography

365

248

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An increase in cyanobacteria bloom formation within lakes has been forecasted as a result of global warming. We investigated the particular physical and chemical thresholds for cyanobacteria performance in a lake model system, the polymictic eutrophic Mü ggelsee, which has been affected by significant warming trends and substantial reductions in external nutrient load. To identify key physical and nutrient thresholds favoring cyanobacterial performance, we applied classification tree analysis to water temperature, Schmidt stability, oxygen, pH, nutrients (including phosphorus, nitrogen, and their relative ratios), and zooplankton abundance during periods of summer thermal stratification. Although total phosphorus (TP) concentration was the principal force driving cyanobacteria contribution to total algal mass, climate-induced changes in the thermal regime, rather than direct temperature effects, positively influenced cyanobacteria dominance. Stratification periods exceeding 3 weeks and exhibiting a Schmidt stability of .44 g cm cm 22 favored cyanobacteria proliferation within a critical TP concentration range (70-215 mg L 21 ). The dominating genera Aphanizomenon, Anabaena, and Microcystis achieved the highest biomass in cases in which total nitrogen concentrations exceeded 1.29 mg L 21 , stratified conditions exceeded a duration of 3 weeks, and TP concentrations exceeded 215 mg L 21 , respectively. Given the observed broad range of TP thresholds within which climate warming enhances the probability of cyanobacteria dominance, the incidence of cyanobacteria blooms will certainly increase in many lakes under future climate scenarios.

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Section: Methodsmentioning

confidence: 99%

“…Zooplankton were collected as a composite sample throughout the entire water column during the entire investigation period . Detailed descriptions of sampling and processing have been previously reported in Driescher et al (1993).…”

Section: Methodsmentioning

confidence: 99%

Cyanobacteria dominance: Quantifying the effects of climate change

Wagner

Adrian

2009

Limnology & Oceanography

365

248

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“…It is flushed by the lowland river Spree and has a mean, theoretical retention time of 42 days, which is prolonged during summer due to low discharge. The pelagic community has been studied intensively over the last two decades DRIESCHER et al, 1993;NIXDORF and HOEG, 1993;. During occasional, short-lived periods of stratification which are indicated in Figures 3 and 5, oxygen was rapidly depleted in deeper water layers.…”

Section: Methodsmentioning

confidence: 99%

“…This approach accounted for possible horizontal and vertical heterogeneity (for details see DRIESCHER et al, 1993). Phytoplankton were fixed with Lugols's solution and enumerated using Utermöhl microscopy.…”

Section: Methodsmentioning

confidence: 99%

Biomass Size Spectra and Plankton Diversity in a Shallow Eutrophic Lake

Gaedke¹,

Seifried

Adrian

2004

International Review of Hydrobiology

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Biomass size spectra collate structural and functional attributes of plankton communities enabling standardised temporal and cross-system comparisons and may be rapidly obtained by automated particle counters. To examine how differences in plankton communities from highly eutrophic and more oligotrophic lakes are reflected in size spectra, a three-year time series of biomass size spectra was established for polymictic, eutrophic Lake Müggelsee, based on approximately weekly sampling and microscopic enumeration. The continuous but often bumpy size spectra reflected appropriately the seasonal and trophy-related variations in the plankton composition and growth conditions and the potential impact of daphnids on smaller plankton. We tested the hypothesis that more diverse plankton communities have smoother size spectra than impoverished ones. The spectra of Lake Müggelsee and other more or less eutrophic lakes covaried roughly with the functional diversity in total plankton composition but were unrelated to taxonomical diversity within the phyto-or mesozooplankton. The slopes of the normalised size spectra of Lake Müggelsee were generally more negative than -1, exhibited a recurrent seasonal pattern and were strongly correlated with crustacean biomass. In contrast to less eutrophic systems, slopes could not be used to quantify energy fluxes within the food web due to highly variable algal P/B ratios and frequently bumpy size distributions. The latter indicated stronger deviations from the ideal concept of a steady energy flow along the size gradient than found in e.g. large, mesotrophic Lake Constance.

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“…Lake Müggelsee is a shallow eutrophic lake with an area of 7.3 km 2 and a mean depth of 4.9 m (Driescher et al 1993). The Müggelsee is a polymictic lake; thus, its water is mixed most times in the year (Nixdorf 1994;Eckert and Walz 1999;Kozerski and Kleeberg 1998).…”

Section: Sediment and Watermentioning

confidence: 99%

Quantification of pumping rate of Chironomus plumosus larvae in natural burrows

et al. 2009

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This paper investigates and compares experimentally determined water velocity field above natural macrozoobenthos burrows generated by Chironomus Plumosus larva during their bio-irrigation activity. All experiments were carried out using particle image velocimetry and performed in mesocosms filled with sediment burrowed by larvae, and the water velocity fields near the inlets and outlets of the U-shaped burrows were measured. From water velocity data the average volumetric flow rates between 54.6 and 61.1 mm 3 /s were calculated. Assuming an average burrow diameter of 2.25 mm, the volumetric flow rates suggest the average flow velocities through burrows during the pumping period between 13.7 and 15.4 mm/s. Two additional interesting phenomena could also be shown by analyzing the flow field generated by the larva. The analysis of the amount of tracers used for visualizations revealed that some of the tracer particles added to the water must have been consumed along their path from the inlet toward the outlet, hinting clearly to the so-called filter-feeding action of C. plumosus. The second phenomenon is due to the form of motion C. plumosus generates. By careful flow visualizations it was found that unlike other organisms such as Urechis caupo that use peristaltic body contractions, C. plumosus worms its body sinusoidally catapulting the fluid far into the overlying water body. This action is of ecological advantage for it avoids generating short oxygen circuits for their respiration and filter feeding.

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Lake Müggelsee and its Environment — Natural Conditions and Anthropogenic Impacts

Cited by 90 publications

References 7 publications

Cyanobacteria dominance: Quantifying the effects of climate change

Cyanobacteria dominance: Quantifying the effects of climate change

Biomass Size Spectra and Plankton Diversity in a Shallow Eutrophic Lake

Quantification of pumping rate of Chironomus plumosus larvae in natural burrows

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