Počet záznamů: 1
Light as a Controlling Factor of Winter Phytoplankton in a Monomictic Reservoir
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SYSNO ASEP 0559100 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Light as a Controlling Factor of Winter Phytoplankton in a Monomictic Reservoir Tvůrce(i) Fott, J. (CZ)
Nedbalová, L. (CZ)
Brabec, Marek (UIVT-O) RID, SAI, ORCID
Kozáková, Radka (ARU-G) RID, SAI, ORCID
Řeháková, Klára (BC-A) RID, ORCID
Hejzlar, Josef (BC-A) RID, ORCID
Šorf, M. (CZ)
Vrba, Jaroslav (BC-A) RID, ORCIDČíslo článku 125995 Zdroj.dok. Limnologica. - : Elsevier - ISSN 0075-9511
Roč. 95, July 2022 (2022)Poč.str. 11 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova Chlorophyll a ; CE-QUAL model ; PEG model ; Ice cover ; Climate change ; Daphnia Vědní obor RIV BB - Aplikovaná statistika, operační výzkum Obor OECD Statistics and probability CEP GA15-04034S GA ČR - Grantová agentura ČR GA206/03/1491 GA ČR - Grantová agentura ČR EF16_025/0007417 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UIVT-O - RVO:67985807 ; ARU-G - RVO:67985912 ; BC-A - RVO:60077344 UT WOS 000823266600002 EID SCOPUS 85133782613 DOI 10.1016/j.limno.2022.125995 Anotace Factors affecting the seasonal succession of plankton communities in freshwater temperate lakes have been thoroughly studied for decades. However, there are still relatively few data describing the winter season patterns in detail, as the focus has been mostly on spring to autumn conditions. Ice cover is often the crucial factor limiting light availability for winter phytoplankton, but in warm monomictic lakes is usually lacking and the gradually increasing solar radiation should, theoretically, drive phytoplankton growth. In this study conducted in 2002–2010, we documented regular sharp increases in phytoplankton chlorophyll a, starting just after the winter solstice and lasting throughout the total circulation and/or unstable inverse stratification period in the monomictic Slapy reservoir (Czechia). Chlorophyll a concentrations analysed in one-week intervals reached their yearly minimum of 0.2–0.8 µg L−1 in the solstice period, and the spring peak occurred before the onset of stable thermal stratification. The regular pattern was slightly disrupted in some years, associated with short periods of ice cover. Winter phytoplankton were species poor and dominated by diatoms, cryptophytes, green algae, and cyanobacteria. Using semiparametric regression approach, we aimed to test if selected environmental parameters had a significant effect on the observed winter trend. The resulting model revealed that solar radiation and water temperature positively influenced log chlorophyll a concentrations, whereas water age had a significant negative effect. On the other hand, zooplankton density and ice cover effects were not significant. The shapes of the marginal effects of water temperature and solar radiation were nonlinear, and the interaction of these two major factors was significant. The model-based estimated chlorophyll a concentrations showed a shift from radiation dominance to temperature-positive effects along the temperature gradient. This might represent as yet neglected pattern of phytoplankton seasonal development in warm monomictic lakes worldwide. Pracoviště Ústav informatiky Kontakt Tereza Šírová, sirova@cs.cas.cz, Tel.: 266 053 800 Rok sběru 2023 Elektronická adresa https://dx.doi.org/10.1016/j.limno.2022.125995
Počet záznamů: 1