Changes in Phytoplankton Structure
due to Prematurely Limited Restoration
Treatments

Kozák, Anna; Rosińska, Joanna; Gołdyn, Ryszard

doi:10.15244/pjoes/75956

Cited by 13 publications

(13 citation statements)

References 29 publications

(40 reference statements)

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“…The diversity was higher than noted in shallow hypertrophic Syczyńskie Lake (Toporowska and Pawlik-Skowrońska 2014). An increase in the value of phytoplankton diversity during lake restoration is usually associated with the improvement of water quality, which has been demonstrated in several lakes (Gołdyn et al 2014;Kozak et al 2017Kozak et al , 2018. The intensity of the internal P-loading process was significantly lower in the littoral zone, where good oxygenation of water overlying the sediments was observed throughout the whole year.…”

Section: Discussionmentioning

confidence: 89%

Internal Loading of Phosphorus from Bottom Sediments of Two Meso-eutrophic Lakes

et al. 2019

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The aim of the study was to determine the seasonal and spatial variability of phosphorus release from bottom sediments of two lakes in Poland (Wielkopolska Region): Lusowskie Lake and Prawe Lake. The comparison of results from these two lakes could have been reliably made, because they were characterized by a similar trophic state (meso-eutrophic), were located in the same climatic zone, and were examined at the same time but differed in terms of morphometry (area, depth, and shape) as well as land use of catchment area. These dimictic lakes were characterized by hypolimnetic oxygen deficits in summer. The internal loading of phosphorus was analysed on the basis of ex situ experiments with intact cores of bottom sediments sampled at two stations, situated in the profundal (the deepest place in the lake) and in the littoral (2.0 m depth). The results indicated that a higher phosphorus load was released from bottom sediments in the profundal zone than in the littoral zone of both lakes. Phosphorus release from the profundal zone was twofold higher in Prawe Lake than in Lusowskie Lake. It reached 2.6 mg P m −2 d −1 in spring and winter in the larger and deeper Lusowskie Lake, compared to 6.04 mg P m −2 d −1 in autumn in the smaller and shallower Prawe Lake. In the littoral zone, phosphorus release reached 1.67 mg P m −2 d −1 and 0.16 mg P m −2 d −1 in both lakes, respectively. Differences in phosphorus internal loading between the lakes were due to differences in the stability of thermal stratification, time of water mixing and oxygen concentration in the depth profile of the lake. Article Highlights • Seasonal and spatial changes of P internal loading from bottom sediments in meso-eutrophic lakes is presented • P release from the profundal zone was twofold higher in Prawe than in Lusowskie Lake. • Differences in P internal loading between the lakes were due to differences in the stability of thermal stratification, time of water mixing, and oxygen concentration

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Section: Discussionmentioning

confidence: 89%

Internal Loading of Phosphorus from Bottom Sediments of Two Meso-eutrophic Lakes

et al. 2019

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“…According to Crossetti et al [41] coda S1 and J occurred in a shallow lake in Brazil under a lowered concentration of soluble phosphorus in the water. An additional reason for the intensive growth of phytoplankton, especially from the coda H1 and S1 (cyanobacteria), were very favorable temperature conditions in summer [42][43][44]. It is worth mentioning that the increasing trends of temperature in the last decades favor cyanobacterial blooms [45][46][47][48] and reconstruction of species composition towards an increase of the number of invasive taxa [49][50][51].…”

Section: Discussionmentioning

confidence: 99%

Functional Groups of Phytoplankton and Their Relationship with Environmental Factors in the Restored Uzarzewskie Lake

Kozák

Budzyńska

Dondajewska-Pielka

et al. 2020

Water

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Uzarzewskie Lake is a small, postglacial lake, located in western Poland. The lake is under restoration treatment since 2006. At first, iron treatment was done for 2 years. In the second stage, spring water was directed into the hypolimnion in order to improve water oxygenation near the bottom sediments. The purpose of our research was to determine changes in the contribution of functional groups to the total number of taxa and total biomass of phytoplankton due to changes in the physical and chemical characteristics of the restored lake. Phytoplankton composition was analyzed in three periods: (1) before restoration; (2) during the first method of restoration; and (3) when the second method was implemented in the lake. Epilimnetic phytoplankton was sampled every year monthly from March to November. The relationship between phytoplankton groups and environmental factors (water temperature, ammonium nitrogen, nitrate nitrogen, dissolved phosphorus, conductivity and pH) was examined, using the canonical analyses. The redundancy analysis indicated that the temperature, dissolved phosphates concentration, ammonium nitrogen and pH were the main determining factors of the phytoplankton community dynamics. During the study, 13 coda dominated the phytoplankton biomass. Cyanobacteria of the codon H1 with such species as Aphanizomenon gracile, Dolichospermum planctonicum, D. viguieri dominated the phytoplankton community before restoration. S1 group consisting of Planktolyngbya limnetica, Limnothrix redekei and Planktothrix agardhii mostly dominated during the period in which the first method was used. Improvement of water quality due to restoration efforts in the third period caused dominance of other groups, especially J (Actinastrum hantzschii and other Chlorococcales), C (Asterionella formosa and other diatoms), Y (Cryptomonas marssonii and other cryptophytes), Lo (Peridiniopsis cunningtonii and other dinophytes) and X2 (Rhodomonas lacustris).

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“…In the years 2015-2016, the restoration treatments were limited to only one method, i.e. aeration with the use of pulverising aerator (Kozak et al 2018;Kowalczewska-Madura et al 2020).…”

Section: Methodsmentioning

confidence: 99%

“…There was noted an increase of phytoplankton biodiversity and decrease in the number of cyanobacteria. Unfortunately, as a result of limiting the restoration from three to one method, the water quality of this lake has deteriorated again (Kozak et al 2014;Kozak et al 2018;Rosińska et al 2017;2019;Rosińska and Gołdyn 2015;Kowalczewska-Madura et al 2019;Kowalczewska-Madura et al 2020). This article includes the results of zooplankton research in 2015-16, i.e.…”

Section: Methodsmentioning

confidence: 99%

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Were there any changes in zooplankton communities due to the limitation of restoration treatments?

Rosińska

Kowalczewska‐Madura

Kozák

et al. 2021

Limnological Review

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Zooplankton is a good indicator of water quality state. Analysing the species composition and abundance, it is possible to assess the condition of the water body and predict the direction of changes. The aim of the study was to analyse the zooplankton in a shallow urban lake, in which restoration was limited to one method, i.e. wind-aeration. The results were compared with the earlier data obtained during sustainable restoration (three methods: wind-aeration, phosphorus inactivation, biomanipulation) and before the restoration period. The zooplankton was sampled monthly in 2015 and 2016 in the deepest place of the lake from the surface to the bottom. The trophic state was determined based on rotifer trophic state index for lakes (TSIROT). Although the species composition of zooplankton communities varied very little among the restoration periods (Keratella cochlearis f. tecta mainly dominated), significant changes in the abundance of zooplankton were found in the analysed lake. The maximum of total abundance was noted in 2015, almost 5500 ind. L−1, and in the next year its decrease was almost 3-fold, to ca. 1800 ind. L-1. Based on TSIROT, the water was still eutrophic. Leaving only one method of restoration (namely, oxygenation of the bottom waters) proved insufficient to support the development of crucial organisms as cladocerans. The changes in the abundance could have resulted more from seasonal changes than from the effects of aeration. A reduction in species number and maintaining a high proportion of rotifers typical for a high trophic state indicated a return of the ecosystem to its pre-restoration state. High variability in the rotifer abundance indicated a continuous imbalance of the ecosystem. Previous restoration treatments using several methods simultaneously showed better effectiveness. The change of strategy of restoration before obtaining a stable improvement of water quality destroyed previously achieved effects.

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Changes in Phytoplankton Structure due to Prematurely Limited Restoration Treatments

Cited by 13 publications

References 29 publications

Internal Loading of Phosphorus from Bottom Sediments of Two Meso-eutrophic Lakes

Internal Loading of Phosphorus from Bottom Sediments of Two Meso-eutrophic Lakes

Functional Groups of Phytoplankton and Their Relationship with Environmental Factors in the Restored Uzarzewskie Lake

Were there any changes in zooplankton communities due to the limitation of restoration treatments?

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