Models of phosphorus turn-over in a hypertrophic lake: the Lake Swarzędzkie case study

Kowalczewska‐Madura, Katarzyna; Gołdyn, Ryszard

doi:10.2478/v10009-010-0041-5

Cited by 14 publications

(4 citation statements)

References 23 publications

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“…These taxa could simultanously even be stimulated by zooplankton predators (positive correlation). Their nutrient excretions may cause an increase in phytoplankton biomass, as stated in Swarzędzkie Lake [ 42 – 43 ].…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton Composition and Abundance in Restored Maltański Reservoir under the Influence of Physico-Chemical Variables and Zooplankton Grazing Pressure

2015

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In this paper we present the effects of environmental factors and zooplankton food pressure on phytoplankton in the restored man-made Maltański Reservoir (MR). Two methods of restoration: biomanipulation and phosphorus inactivation have been applied in the reservoir. Nine taxonomical groups of phytoplankton represented in total by 183 taxa were stated there. The richest groups in respect of taxa number were green algae, cyanobacteria and diatoms. The diatoms, cryptophytes, chrysophytes, cyanobacteria, green algae and euglenophytes dominated in terms of abundance and/or biomass. There were significant changes among environmental parameters resulting from restoration measures which influenced the phytoplankton populations in the reservoir. These measures led to a decrease of phosphorus concentration due to its chemical inactivation and enhanced zooplankton grazing as a result of planktivorous fish stocking. The aim of the study is to analyse the reaction of phytoplankton to the restoration measures and, most importantly, to determine the extent to which the qualitative and quantitative composition of phytoplankton depends on variables changing under the influence of restoration in comparison with other environmental variables. We stated that application of restoration methods did cause significant changes in phytoplankton community structure. The abundance of most phytoplankton taxa was negatively correlated with large zooplankton filter feeders, and positively with zooplankton predators and concentrations of ammonium nitrogen and partly of phosphates. However, restoration was insufficient in the case of decreasing phytoplankton abundance. The effects of restoration treatments were of less importance for the abundance of phytoplankton than parameters that were independent of the restoration. This was due to the continuous inflow of large loads of nutrients from the area of the river catchment.

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Section: Discussionmentioning

confidence: 99%

Phytoplankton Composition and Abundance in Restored Maltański Reservoir under the Influence of Physico-Chemical Variables and Zooplankton Grazing Pressure

2015

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“…Shallow urban Swarzędzkie Lake is located near Poznań (Greater Poland Region, Western Poland) (52°24′49″N, 17°03′54″E). The lake area is 93.7 ha, and volume is 2 million m 3 , with maximum and average depths of 7.2 and 2.6 m, respectively [21][22]. The lake was hypertrophic and with intensive cyanobacterial blooms caused by Aphanizomenon gracile (Lemm.)…”

Section: Study Areamentioning

confidence: 99%

Changes in Phytoplankton Structure due to Prematurely Limited Restoration Treatments

Kozák¹,

Rosińska²,

Gołdyn³

2018

Pol. J. Environ. Stud.

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Phytoplankton plays an important role in the structure and functioning of an aquatic ecosystem, thus affecting other groups of organisms [1]. The growth of phytoplankton depends mainly on the availability of nitrogen and phosphorus [2-4]. Excessive eutrophication caused by high nutrient concentrations (especially phosphorus and nitrogen) along with strong cyanobacterial blooms results in decreasing aquatic ecosystem biodiversity [5]. Water

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“…In freshwater bodies the recycled matter can be crucial for the functioning of ecosystems of high as well as low productivity (Ramin, Perhar, Shimoda, & Arhonditsis, ). Although in freshwaters excretion is one of many sources of biogenic elements, it still largely covers the demand of autotrophs, and in the summer it is more important than the external or internal supply (Bowszys, ; Bruce et al, ; den Oude & Gulati, ; Kowalczewska‐Madura, Gołdyn, & Szyper, ; Kowalczewska‐Madura & Gołdyn, ; Sereda & Hudson, ). In freshwater lakes the release of nutrients by zooplankton is intensive from spring to autumn; during the summer stagnation the total excretion of nutrients is higher than at the time of turnover (Bruce et al, ).…”

Section: Introductionmentioning

confidence: 99%

Nutrients excretion by zooplankton in two brackish water bodies

Gutkowska

Paturej

Bowszys

2018

Internat Rev Hydrobiol

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Excretion of nutrients by zooplankton is a complex process crucial for the functioning of aquatic ecosystems. Most of the available literature data concern excretion in freshwater or marine ecosystems, but little is known about the nutrients regeneration in brackish water bodies, and the described research results are often inconclusive. Therefore, the aim of this study was to investigate the intravital release of nitrogen and phosphorous in brackish water bodies and to analyze the effect of salinity levels on the process of excretion. Studies on excretion were based on laboratory experiments. In 2010, the rate of intravital release of nutrients by zooplankton sampled from the natural environment of the Vistula Lagoon and Lake Łebsko was analyzed in order to estimate the rate of excretion of nitrogen and phosphorus depending on the salinity level. A similar experiment was also carried out on monocultures of Brachionus calyciflorus. Results from studies on natural populations revealed variable rates of nutrients excretion for different levels of salinity. This correlation, however, was not statistically significant. Experiments on B. calyciflorus monocultures showed a significant (p < 0.05) linear correlation between salinity and excretion. The study demonstrated that higher concentrations of salts dissolved in water accelerate the rate of nutrients regeneration by zooplankton. The investigated process is determined by many factors, and for the reliable estimation of the excretion rate a multivariate analysis should be performed.

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Models of phosphorus turn-over in a hypertrophic lake: the Lake Swarzędzkie case study

Cited by 14 publications

References 23 publications

Phytoplankton Composition and Abundance in Restored Maltański Reservoir under the Influence of Physico-Chemical Variables and Zooplankton Grazing Pressure

Phytoplankton Composition and Abundance in Restored Maltański Reservoir under the Influence of Physico-Chemical Variables and Zooplankton Grazing Pressure

Changes in Phytoplankton Structure due to Prematurely Limited Restoration Treatments

Nutrients excretion by zooplankton in two brackish water bodies

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