Effects of salinity on growth and lipid accumulation of biofuel microalga Nannochloropsis salina and invading organisms

Sustainable production of toxin free marine microalgae biomass as fish feed in large scale open system in the Qatari desert

“…Initially, the concentration of this contaminant specie was negligible, however as the cultures were prolonged up to 10 days, a maximum of 2 number of this strain was counted for every 1000 Nannochloropsis sp. Bartley et al (2013) found that Nannochloropsis salina was contaminated with diatoms, cyanobacteria and Ciliates; diatoms and ciliates were present in all salinity range whereas cyanobacteria were present only in lower salinity. On the contrary, in this study, ciliates were only observed in very small numbers at lower salinities; however, with higher salinities, no ciliates were observed.…”

“…Open pond cultivation of microalgae biomass is often susceptible of contaminations from both competing microalgae and or predators like ameba and zooplankton (Bartley et al, 2013;Parmar et al, 2011). Although monoculture of the selected strain is desirable, for feed purpose the culture should be at least free from toxin-producing organisms.…”

Control of protozoa contamination and lipid accumulation in Neochloris oleoabundans culture: Effects of pH and dissolved inorganic carbon

“…Some suggested that subjecting the culture to high salinity to inhibit some grazers was applicable to some taxa of microalgae (Day et al, 2012). These studies, however, mostly focused on single factor effects on controlling the invading organisms in marine strains cultures (Bartley et al, 2013;Becker, 1994).…”

“…To this end, extensive investigations have focused on the impacts of cultivation conditions such as light intensity, temperature, medium composition, pH, CO 2 On another front, sodium bicarbonate has been shown to be a potential carbon source for microalgae (Gardner et al, 2012), which is cost-effective in storage and transportation. The impact of bicarbonate on cell growth and lipid accumulation has been one of the objectives subjected to extensive studies (Moheimani, 2013;Gardner et al, 2012).…”

Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)

“…Increased rainfall is expected in southeastern and southern Brazil, Paraguay, Uruguay, Argentina and some regions of Bolivia (Scherner et al 2013), leading to a change in the abiotic factors of aquatic ecosystems, including salinity. Fluctuations in salinity can change the density of water, nutrient uptake, and osmotic Débora Tomazi Pereira, Carmen Simioni, Elisa Poltronieri Filipin, Fernanda Bouvie, Fernanda Ramlov, Marcelo Maraschin, Zenilda Laurita Bouzon and Éder Carlos Schmidt pressure in plant cells (Lobban et al 1994;Fong et al 1996), leading to significant physiological and biochemical stress for algae, such as changes in growth rate, photosynthetic performance, morphology, and germination in the green microalga Nannochloropsis salina (Bartley et al 2013) and thalli of the red algae Pterocladiella capillacea (Felix et al 2014), Stylonema alsidii (Stylonematophyceae) (Nitschke et al 2014), and Kappaphycus alvarezii (Mandal et al 2015). For red algae spores treated with different salinity, the development of the Gelidium floridanum was inhibited under hyposaline conditions, but only delayed under hypersaline conditions (Filipin et al 2016).…”