RT Journal Article
T1 Influence of Microcystis sp. and freshwater algae on pH: changes in their growth associated with sediment
A1 Acuña Alonso, Carolina
A1 Lorenzo, Olalla
A1 Álvarez Bermúdez, Xana
A1 Cancela Carral, Maria De Los Angeles
A1 Valero Gutiérrez del Olmo, Enrique Maria
A1 Sánchez Bermúdez, Ángel Manuel
K1 2414 Microbiología
K1 2499 Otras Especialidades Biológicas
AB Samples from two reservoirs with eutrophication problems, located in Pontevedra and Ourense (Northwestern Spain), were cultured, along with a third crop from a reservoir with no problems detected in Ourense (Northwestern Spain). The samples were grown under the same conditions (with an average temperature of 21 ± 2 °C, and a 3000 lux light intensity) in triplicate, and their growth, absorbance and pH were studied. High correlation values were obtained for pH and cellular growth (R2 ≥ 95%). The water from Salas showed the greatest microalgal growth (0.15 × 106 cells/ml to 31.70 × 106 cells/ml of "Microcystis sp." for the last day of culturing) and the greatest increase in pH (5.72–9.02). In all the cultures studied here, the main species that reproduced was "Microcystis sp.", which can produce neurotoxins and hepatotoxins. In addition, water samples were cultured with sediments of their own reservoir and with others to observe their evolution. The sediments studied in this case were rich in biotites, which can lead phosphate to be a limiting factor for phytoplankton due to the formation and sedimentation of insoluble salts of ferric phosphate. In crops grown with sediments from the Salas reservoir, actinobacteria developed which can inhibit microalgal growth. The study of the growth of cyanobacteria and possible methods of inhibiting them directly concerns the quality of water and its ecosystems, avoiding pollution and impact on ecosystems.
PB Environmental pollution
SN 2776-5296
YR 2020
FD 2020-08
LK http://hdl.handle.net/11093/4343
UL http://hdl.handle.net/11093/4343
LA eng
NO Environmental pollution, 263, Part B: 114435 (2020)
DS Investigo
RD 08-dic-2023