Combined nanoTiO2 and nitrogen effects on phytoplankton: a mesocosm approach

Dauda, Suleiman; Gabriel, Ayene Martha; Idris, Onozasi Firdaws; Chia, Mathias Ahii

doi:10.1007/s10811-020-02187-0

Cited by 10 publications

(4 citation statements)

References 55 publications

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“…Consistent with several previous studies (Bielmyer‐Fraser et al., 2014; Cheloni et al., 2016; Dauda et al., 2020; Yallop et al., 2022), we found that nanoparticles reduced the growth rate and carrying capacity of phytoplankton species and the productivity of phytoplankton communities. More importantly, our study revealed that smaller phytoplankton species were less tolerant of nanoparticles than larger ones, in that they suffered greater reduction in growth rate under increasing nanoparticle concentration (Figure 2b).…”

Section: Discussionsupporting

confidence: 93%

Cell size‐dependent species sensitivity to nanoparticles underlies changes in phytoplankton diversity and productivity

Zuo,

Southard,

et al. 2023

Global Change Biology

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Nanoparticle pollution has been shown to affect various organisms. However, the effects of nanoparticles on species interactions, and the role of species traits, such as body size, in modulating these effects, are not well‐understood. We addressed this issue using competing freshwater phytoplankton species exposed to copper oxide nanoparticles. Increasing nanoparticle concentration resulted in decreased phytoplankton species growth rates and community productivity (both abundance and biomass). Importantly, we consistently found that nanoparticles had greater negative effects on species with smaller cell sizes, such that nanoparticle pollution weakened the competitive dominance of smaller species and promoted species diversity. Moreover, nanoparticles reduced the growth rate differences and competitive ability differences of competing species, while having little effect on species niche differences. Consequently, nanoparticle pollution reduced the selection effect on phytoplankton community abundance, but increased the selection effect on community biomass. Our results suggest cell size as a key functional trait to consider when predicting phytoplankton community structure and ecosystem functioning in the face of increasing nanopollution.

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Section: Discussionsupporting

confidence: 93%

Cell size‐dependent species sensitivity to nanoparticles underlies changes in phytoplankton diversity and productivity

Zuo,

Southard,

et al. 2023

Global Change Biology

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“…The actual urea and nitrate concentrations in the medium were determined using the magnesium oxide-devarda alloy method, where the rst distillation in 2% boric acid was with Mg oxide to estimate the ammonia content, and the second distillation in fresh 2% boric acid was with Devarda alloy to estimate the nitrate content (Bremner and Keeney 1965). The TiO 2 NPs level used in this study was 48 mg L -1 , a concentration that showed substantial activity in phytoplankton according to our previous studies (Dauda et al 2017) (Dauda et al 2020). The increasing discharge of NPs into the aquatic ecosystem may present scenarios where organisms are exposed to concentrations approaching the mg per liter range (Arabia 2010).…”

Section: Experimental Designmentioning

confidence: 99%

Nitrogen forms and concentration influence the impact of titanium dioxide nanoparticles on the biomass and antioxidant enzyme activities of Microcystis aeruginosa

et al. 2023

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The popularity of Nanoparticles (NPs) have led to their wide production, applications and subsequently released into the aquatic environment in some instances. In the aquatic ecosystem, these NPs affect different populations of photosynthesizing organisms, such as cyanobacteria. The effect of Microcystis aeruginosa exposed to titanium dioxide nanoparticles (TiO 2 -NPs, 48 mg l − 1 ), in combination of low and high concentrations of urea (0.04 mM) and nitrate (9 Mm) was assessed. Microcystins (MCs) production and release were monitored in the cyanobacterium. Results showed that high urea (9 mM), combined with TiO 2 -NPs, inhibited the growth, pigment and malondialdehyde (MDA) content by 82%, 63% and 47% respectively. But 40.7% and 67.7% increase in the concentration of Reactive Oxygen Species (ROS) and glutathione S-transferase (GST) activity was observed in M. aeruginosa respectively. Similarly, low nitrate (0.04 mM) combined with TiO 2 -NPs inhibited growth by 40.3% and GST activity by 36.3%, but stimulated pigment production and ROS concentration in M. aeruginosa. A response suggests that the high urea combined with TiO 2 -NPs and high nitrate combined with TiO 2 -NPs exposure induced oxidative stress in the cyanobacterium. The peroxidase (POD) activity of M. aeruginosa decreased by 17.7% with increasing urea concentrations. Our ndings suggest TiO 2 -NPs and nutrients (urea and nitrate) concentration may adversely impact cyanobacterial development and antioxidant defense enzymes.Although the effect of nitrate concentration on M. aeruginosa was observed to be subsidiary.

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Section: Experimental Designmentioning

confidence: 99%

Nitrogen Forms and Concentration Influence the Impact of Titanium dioxide Nanoparticles on the Biomass and Antioxidant Enzyme Activities of Microcystis aeruginosa

Samuel

Chia

Yusufu

et al. 2022

Preprint

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The popularity of Nanoparticles (NPs) have led to their wide production, applications and subsequently released into the aquatic environment in some instances. In the aquatic ecosystem, these NPs affect different populations of photosynthesizing organisms, such as cyanobacteria. The effect of Microcystis aeruginosa exposed to titanium dioxide nanoparticles (TiO2-NPs, 48 mg l− 1), in combination of low and high concentrations of urea (0.04 mM) and nitrate (9 Mm) was assessed. Microcystins (MCs) production and release were monitored in the cyanobacterium. Results showed that high urea (9 mM), combined with TiO2-NPs, inhibited the growth, pigment and malondialdehyde (MDA) content by 82%, 63% and 47% respectively. But 40.7% and 67.7% increase in the concentration of Reactive Oxygen Species (ROS) and glutathione S-transferase (GST) activity was observed in M. aeruginosa respectively. Similarly, low nitrate (0.04 mM) combined with TiO2-NPs inhibited growth by 40.3% and GST activity by 36.3%, but stimulated pigment production and ROS concentration in M. aeruginosa. A response suggests that the high urea combined with TiO2 –NPs and high nitrate combined with TiO2 –NPs exposure induced oxidative stress in the cyanobacterium. The peroxidase (POD) activity of M. aeruginosa decreased by 17.7% with increasing urea concentrations. Our findings suggest TiO2-NPs and nutrients (urea and nitrate) concentration may adversely impact cyanobacterial development and antioxidant defense enzymes. Although the effect of nitrate concentration on M. aeruginosa was observed to be subsidiary.

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Combined nanoTiO2 and nitrogen effects on phytoplankton: a mesocosm approach

Cited by 10 publications

References 55 publications

Cell size‐dependent species sensitivity to nanoparticles underlies changes in phytoplankton diversity and productivity

Cell size‐dependent species sensitivity to nanoparticles underlies changes in phytoplankton diversity and productivity

Nitrogen forms and concentration influence the impact of titanium dioxide nanoparticles on the biomass and antioxidant enzyme activities of Microcystis aeruginosa

Nitrogen Forms and Concentration Influence the Impact of Titanium dioxide Nanoparticles on the Biomass and Antioxidant Enzyme Activities of Microcystis aeruginosa

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