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Sinice (cyjanobakterie) - dominacja w letnich zakwitach wody na zbiorniku Sulejów

Mankiewicz-Boczek Joanna, Font-Nájera Arnoldo

Gospodarka Wodna

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2023

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Nr 10

11--12

PL

Zakwity wód zdominowane przez toksyczne sinice (cyjanobakterie) są ważnym problemem środowiskowym w erze antropocenu, obserwuje się wzrost ich zasięgu geograficznego oraz częstotliwości, w skali globalnej. W nizinnym, retencyjnym zbiorniku Sulejowski (Sulejów) rokrocznie odnotowywane są, w sezonie letnim, zakwity z sinicami z rodzaju Mircocystis oraz Aphanizomenon. Dodatkowo, pogarszający się stan wody związany jest z cyklicznym wystepowaniem hepatotoksyn sinicowych - mikrocystyn. Wieloletnie badania prowadzone na zbiorniku wskazują na wiodącą rolę stężenia biogenów oraz czasu retencji wody dla rozwoju toksynogennych cyjanobakterii.

EN

Water blooms dominated by toxic cyanobacteria have been an important environmental problem in the Anthropocene, with an increase in their geographical extent and frequency, globally. In the Sulejów - lowland, retention reservoir, cyanobacterial blooms of the genera Mircocystis and Aphanizomenon are recorded annually, during the summer season. In addition, the worsening condition of the water is associated with the cyclic occurrence of cyanobacterial hepatotoxins - microcystins. Long-term studies conducted on the reservoir indicate the leading role of nutrient concentration and water retention time for the development of toxinogenic cyanobacteria.

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Bloom of the potentially toxic cyanobacterium P. rubescens : seasonal distribution and possible drivers of its proliferation in the Vrutci reservoir (Serbia)

Ponjavić Ana Blagojević, Kostić Dušan, Marjanović Prvoslav, Trbojević Ivana, Popović Sladana, Predojević Dragana, Simić Gordana Subakov

Oceanological and Hydrobiological Studies

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2019

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Vol. 48, No. 4

316--327

EN

Planktothrix rubescens is a filamentous cyanobacterium with a worldwide distribution in lakes and reservoirs of varying size and morphology. The objective of this study was to identify the population dynamics and the major drivers of P. rubescens blooms. Samples for qualitative and quantitative analysis of phytoplankton were collected every month in 2014 and 2015 from stationary depths, while the main physical parameters were measured in situ along the water column. Samples for chemical analysis were collected below the surface, at mid-depth (metalimnion) and near the bottom. In the periods of thermal stratification, P. rubescens formed the maximum biomass in the metalimnion, however, its volume-weighted biomass reached the maximum value in the winter mixing period (4.40 mm3 l−1). Changes in the P. rubescens population in the reservoir were related to changes in the measured environmental parameters. Significant physical, hydrological, meteorological and chemical parameters were distinguished based on the multivariate analysis. The variable associated with water-level fluctuations showed the highest positive correlation with P. rubescens biomass. We conclude that it is necessary to establish water quality monitoring and prevent excessive water-level fluctuations to ensure a high quality of water supplies from the reservoir.

3

Riverine water transformation during retention in small lowland reservoirs

Suchowolec T., Górniak A.

Oceanological and Hydrobiological Studies

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2009

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Vol. 38, No.4

103-108

EN

Six small dam reservoirs in northeastern Poland, with different hydrologic and catchment characteristics were selected for research from March to October (2001-2003). There was a significant correlation between DOC and TP in the reservoirs and the water retention time (WRT). The highest values of electrical conductivity (EC) were recorded in reservoirs with an agricultural basin. In almost all reservoirs a statistically significant decrease of EC, compared to inflowing waters, was noted. Nitrates were substantially reduced in afforested catchment reservoirs. The highest TP concentration was recorded in a newly flooded reservoir. In reservoirs with long retention time, phosphorus sedimentation takes place more intensively. This caused phosphorus reduction in outflowing waters.