Search results for " Cyanobacteria blooms"
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Iron operates as an important factor promoting year-round diazotrophic cyanobacteria blooms in eutrophic reservoirs in the tropics
2021
Abstract We hypothesize that iron availability plays an important role in driving phytoplankton structure and dynamics in tropical reservoir. This role has often been neglected in routine monitoring of water quality since the main focus has been addressed on macronutrients such phosphorus and nitrogen. To elucidate the potential regulation exerted by iron availability on phytoplankton, a limnological investigation was carried out in two neighboring eutrophic reservoirs in tropical China. Traditional physical and chemical variables were measured along with total and dissolved iron concentrations to explore how they could influence phytoplankton structure. Statistical analyses showed that dis…
Influence of climate on phytoplankton dynamics in Mediterranean water bodies
2011
Climate is among the factors that influence the hydrology of water bodies and their mixing/stratification patterns. As a consequence, it may affect the ecomorphological selection of phytoplankton. Global climatic patterns, driven by Sun’s magnetic field, were shown to promote cyclic cyanobacteria bloom during the years of drought caused by El Niño. Cyclic droughts, with a periodicity of about 11 years, also occur in the Mediterranean Basin where they produce analogous responses in phytoplankton composition. Some evidences exist that climate change can promote pseudo-eutrophication events and, by altering the hydraulic balance in shallow lakes, cause a shift between a clear macrophyte-domina…