During summer 2020 and 2021, harmful episodes of Ostreopsis were first reported in the Bay of Biscay, affecting the Spanish Basque coast, specifically the city of San Sebastian. This led to implement samplings during summer 2022 and 2023 within this region; two close sites distinguished, primarily, by their substrate features were selected. The abundances of Ostreopsis spp.
View Article and Find Full Text PDFPhytoplankton responds rapidly to nutrient availability variations, becoming a useful indicator for eutrophication and/or management actions to reduce it. The present study evaluated the medium-term response of the phytoplankton community of a temperate estuary (Urdaibai estuary) to the cessation of discharges from a wastewater treatment-plant (WWTP), comparing the physicochemical conditions and the phytoplankton community before (2020) and after (2022) the sewerage works. The cessation led to a decrease of ammonium and phosphate, causing decreases of phytoplankton biomass in the outer and middle estuary and increases in the surroundings of the WWTP.
View Article and Find Full Text PDFIn this study, the effects of shear stress and different culture media on the growth of the filamentous microalga Klebsormidium cf. nitens were studied. The microalga's growth, carotenoids and fatty acids were further evaluated in a pump-driven tubular photobioreactor.
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