Use of Copper to Selectively Inhibit Brachionus calyciflorus (Predator) Growth in Chlorella kessleri (Prey) Mass Cultures for Algae Biodiesel Production

Pradeep, Vishnupriya; Ginkel, Steven W. Van; Park, Sichoon; Igou, Thomas; Yi, Christine; Fu, Hao; Johnston, Rachel K.; Snell, Terry W.; Chen, Yongsheng

doi:10.3390/ijms160920674

Cited by 28 publications

(15 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microalgal community composition and diversity 4 537 classes, and results of the present study suggest that the presence of consumers (zooplankton and pathogenic fungi) affects the dominance of Chlorophyceae on Seonginbong and Dongdo to a greater extent than on Seodo ( Fig. 2 and 3; Johnson and Agrawal 2003;Sarma et al 2003;Yoshida et al 2004;Pradeep et al 2015). Previous studies also indicate that microalgae can affect the external environment.…”

supporting

confidence: 58%

Illumina MiSeq Analysis and Comparison of Freshwater Microalgal Communities on Ulleungdo and Dokdo Islands

Yun

Kim

Yoon

2019

Polish Journal of Microbiology

View full text Add to dashboard Cite

Ulleungdo and Dokdo are volcanic islands with an oceanic climate located off the eastern coast of South Korea. In the present study, we used barcoded Illumina MiSeq to analyze eukaryotic microalgal genera collected from Seonginbong, the highest peak on Ulleungdo, and from groundwater sites on Dongdo and Seodo Islands, which are part of Dokdo. Species richness was significantly greater in the Seonginbong samples than in the Dongdo and Seodo samples, with 834 operational taxonomic units (OTUs) identified from Seonginbong compared with 203 OTUs and 182 OTUs from Dongdo and Seodo, respectively. Taxonomic composition analysis was also used to identify the dominant microalgal phyla at each of the three sites, with Chlorophyta (green algae) the most abundant phyla on Seonginbong and Dongdo, and Bacillariophyta (diatoms) the most abundant on Seodo. These findings suggest that differences in the abundances of Chlorophyta and Bacillariophyta species in the Seonginbong, Dongdo, and Seodo samples are due to variations in species richness and freshwater resources at each sampling location. To the best of our knowledge, this is the first report to detail freshwater microalgal communities on Ulleungdo and Dokdo. As such, the number of species identified in the Seonginbong, Dongdo, and Seodo samples might be an indicator of the ecological differences among these sites and varying characteristics of their microbial communities. Information regarding the microalgal communities also provides a basis for understanding the ecological interactions between microalgae species and other eukaryotic microorganisms.

show abstract

supporting

confidence: 58%

Illumina MiSeq Analysis and Comparison of Freshwater Microalgal Communities on Ulleungdo and Dokdo Islands

Yun

Kim

Yoon

2019

Polish Journal of Microbiology

View full text Add to dashboard Cite

show abstract

“…Some discrepancies were found for some Chlorella products with most of those studied having a significantly higher content of Cu than that declared on the label. Although the origins of such an increased content of Cu levels can only be hypothesized, one should note that Cu compounds can be used in Chlorella cultures as selective inhibitors of some grazing rotifers which can occur in open pond cultivation systems and cause a significant economic loss (Pradeep et al 2015;Day et al 2017); such an application may significantly alter Cu content in the final food product.…”

Section: Discussionmentioning

confidence: 99%

Essential and toxic elements in commercial microalgal food supplements

et al. 2018

View full text Add to dashboard Cite

Arthrospira spp. (known commercially as Spirulina) and Chlorella spp., valued for their evidence-based nutritional and bioactive properties, are cultivated for the purpose of production of food supplements for worldwide distribution. However, the quality and safety of the final product depends on culturing and manufacturing conditions. The present study investigated the content of toxic elements (As species, Al, Cd, Hg, Ni, Pt, Pb, Cr (VI), rare earth elements) and minerals (Ca, Co, Cr, Cu, Fe, K, Na, Mg, Mn, P, Zn) in Chlorella (n = 10) and Spirulina (n = 13) food supplements registered in the European Union. Considering the most common recommended daily dosage 3.0, supplementation with any of the studied product would contribute significantly to mineral intake, with the exception of Fe which was found at high but acceptable levels in both Spirulina and Chlorella formulas. The majority of products revealed agreement between factual mineral content and that declared on the label, the only exception being Cu content in Chlorella products found to be significantly higher (> 130%). All studied supplements were found to have Cd, Hg, and Ni levels much below safety limits, although selected ones were characterized by increased content of Al, Pb, and inorganic As. No hexavalent Cr was detected in the studied products. The study highlights that microalgal supplements can be safe for consumers if appropriate measures are taken to ensure consumer safety, although it underlines the continuous need to monitor these products in order to fully eliminate those of low quality.

show abstract

“…Finally, microalgae strains isolated from heavy metal polluted areas or developed in the laboratory, are able to tolerate increased metal concentrations and can become promising candidates for cultivation under metal stress [ 104 , 235 , 236 , 240 , 241 ]. Such strains are more resistant against detrimental effects of metal exposure and could also be suitable for cultivation and synthesis of target products in outdoor open systems, as metal-stress conditions can prevent contamination by competitive or predatory micro and higher organisms [ 9 , 269 ].…”

Section: Strategy For Microalgal Production In the Presence Of Metmentioning

confidence: 99%

Effect of Metals, Metalloids and Metallic Nanoparticles on Microalgae Growth and Industrial Product Biosynthesis: A Review

Miazek

Iwanek

Remacle

et al. 2015

IJMS

190

View full text Add to dashboard Cite

Microalgae are a source of numerous compounds that can be used in many branches of industry. Synthesis of such compounds in microalgal cells can be amplified under stress conditions. Exposure to various metals can be one of methods applied to induce cell stress and synthesis of target products in microalgae cultures. In this review, the potential of producing diverse biocompounds (pigments, lipids, exopolymers, peptides, phytohormones, arsenoorganics, nanoparticles) from microalgae cultures upon exposure to various metals, is evaluated. Additionally, different methods to alter microalgae response towards metals and metal stress are described. Finally, possibilities to sustain high growth rates and productivity of microalgal cultures in the presence of metals are discussed.

show abstract

Use of Copper to Selectively Inhibit Brachionus calyciflorus (Predator) Growth in Chlorella kessleri (Prey) Mass Cultures for Algae Biodiesel Production

Cited by 28 publications

References 13 publications

Illumina MiSeq Analysis and Comparison of Freshwater Microalgal Communities on Ulleungdo and Dokdo Islands

Illumina MiSeq Analysis and Comparison of Freshwater Microalgal Communities on Ulleungdo and Dokdo Islands

Essential and toxic elements in commercial microalgal food supplements

Effect of Metals, Metalloids and Metallic Nanoparticles on Microalgae Growth and Industrial Product Biosynthesis: A Review

Contact Info

Product

Resources

About