In the quest of finding local strains marine ciliates that can be easily cultured under a broad range salinity and fed with microalgae, Fabrea salina Henneguy, 1890 Condylostoma sp. Bory de St. Vincent, 1826 were for 22 days in small volumes at temperature 16–18 °C flagellated microalgae. F. presented clear preference 40 ppt Condylostoma. 20 ppt. Rhodomonas Hill Wetherbee, 1989 most efficient f...

The natural environment of phytoplankton is variable in manifold ways. Light, as essential resource for photosynthetic phytoplankton, fluctuates its intensity (quantity) well spectrum (quality) over great temporal scales aquatic ecosystems. To elucidate the significance heterogeneity available light we analyzed growth four marine North Sea species (chlorophyte Tetraselmis sp., cryptophyte Rhodo...

Bivalves accumulate toxins produced by microalgae, thus becoming harmful for humans. However, little information is available about their toxicity to the bivalve itself. In present work, physiological stress and damage after ingestion of toxic dinoflagellate species (Gymnodinium catenatum) a diatom (Skeletonema marinoi, which non-toxic humans but may be grazers) in oyster Magallana angulata are...

9 10 During the Mesozoic Era, dinoflagellates, coccolithophorids and diatoms became prominent 11 primary producers in the oceans, succeeding an earlier biota in which green algae and 12 cyanobacteria had been proportionally more abundant. This transition occurred during an 13 interval marked by increased sulfate concentration in seawater. To test whether increasing 14 sulfate availability facil...