Portal de Periódicos da CAPES

Temperature and growth strategies as the essential factors influencing the occurrence of Stephanodiscus minutulus (Kützing) Cleve & Möller and Palatinus apiculatus (Ehrenberg) Craveiro, Calado, Daugbjerg & Moestrup

2017; International Association of Theoretical and Applied Limnology; Volume: 189; Issue: 2 Linguagem: Inglês

10.1127/fal/2016/0941

2363-7110

István Grigorszky, Keve T. Kiss, Gabriella Pór, György Dévai, Alex Sándor Nagy, Imre Somlyai, Csaba Berta, Mónika Duleba, Zsuzsa Trábert, Éva Ács,

Plant-Derived Bioactive Compounds

The life cycle of diatoms and dinoflagellates enables them to produce interannually varying dominances.This variability results from life-cycle interactions, physical conditions, and inter-species competition for nutrients and light.In particular, the overall dominant species of the year can be linked to the abundances of resting stages and temperature in spring.The aim of this study was to investigate the effects of temperature and life cycle as biotic factors on spring phytoplankton blooms caused by Stephanodiscus minutulus (Kützing) Cleve & Möller and Palatinus apiculatus (Ehrenberg) Craveiro, Calado, Daugbjerg & Moestrup, in a Hungarian shallow backwater.The composition of plankton communities exhibited a marked interannual heterogeneity.Our results suggested that a slight decrease in temperature in spring favours a spring bloom of vegetative dinoflagellates before encystment begins.However, a rapid increase in temperature results in high abundances of dinoflagellate cysts, which, in turn, leads to the dominance of diatoms.In this case, encystment starts before a pronounced dinoflagellate spring bloom is established.