Phytoplankton response to polystyrene microplastics: Perspective from an entire growth period

Mao, Yufeng; Ai, Hainan; Chen, Yi; Zhang, Zhenyu; Zeng, Peng; Kang, Li; Li, Wei; Gu, Weikang; He, Qiang; Li, Hong

doi:10.1016/j.chemosphere.2018.05.170

Cited by 511 publications

(194 citation statements)

References 56 publications

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“…The resulting increase in particle size may have affected their toxicity (Paul-Pont et al, 2018). Indeed, previous studies reported that micro-scale (>1µm) particles had less impact on microalgae than nano-scale plastics (Mao et al, 2018;Sjollema et al, 2016). In addition to the particle size, significant lower values of NP zeta potential were observed in both FSW and algae media.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…has raised controversial results. On the one hand, studies revealed a decrease in algal photosynthesis upon polystyrene nano-beads exposure (Bergami et al, 2017;Bhattacharya et al, 2010;Mao et al, 2018). On the other hand, other studies reported decreased algal growth with no impact on algal photosynthetic rate (Sjollema et al, 2016;Yokota et al, 2017).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The interaction between MP and marine diatom aggregates has already been shown experimentally (Long et al, 2015; modifying both algae and MP settlement rates in the water column. Due to their intrinsic characteristics, nanomaterials, and more often NP, may have higher impact than their micro-scale counterparts (Mao et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile?

González-Fernández

Toullec

Lambert

et al. 2019

Environmental Pollution

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The potential presence of nanoplastics (NP) in aquatic environments represents a growing concern regarding their possible effects on aquatic organisms. The objective of this study was to assess the impact of polystyrene (PS) amino-modified particles (50 nm PSNH2) on the cellular and metabolic responses of the diatom Chaetoceros neogracile cultures at two essential phases of the growth cycle, i.e. exponential (division) and stationary (storage) phases. Both cultures were exposed for 4 days to low (0.05 μg mL−1) and high (5 μg mL−1) concentrations of PS-NH2. Exposure to NP impaired more drastically the major cellular and physiological parameters during exponential phase than during the stationary phase. Only an increase in ROS production was observed at both culture phases following NP exposures. In exponential phase cultures, large decreases in chlorophyll content, esterase activity, cellular growth and photosynthetic efficiency were recorded upon NP exposure, which could have consequences on the diatoms life cycle and higher food-web levels. The observed differential responses to NP exposure according to culture phase could reflect i) the higher concentration of Transparent Exopolymer Particles (TEP) at stationary phase leading to NP aggregation and thus, probably minimizing NP effects, and/or ii) the fact that dividing cells during exponential phase may be intrinsically more sensitive to stress. This work evidenced the importance of algae physiological state for assessing the NP impacts with interactions between NP and TEP being one key factor affecting the fate of NP in algal media and their impact to algal' cells. Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

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Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile?

González-Fernández

Toullec

Lambert

et al. 2019

Environmental Pollution

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“…The observed responses may also vary during the exposure, thus setting specific requirements for the test duration. For instance, in a green alga Chlorella pyrenoidosa, a reduction in growth was observed during the lag phase, with some inhibition in the exponential phase, but during the stationary phase this trend was reversed due to a compensatory growth that exceeded the values observed in control (Mao et al, 2018). Such biphasic responses indicate that even when growth inhibition occurs, the algal populations were able to adapt and sustain productivity.…”

Section: Discussionmentioning

confidence: 99%

“…When conducting this test with various effluents, it is recommended to measure total suspended solids and total settled solids, because removal of these fractions of the effluent could influence the growth inhibition and thus toxicity estimates. The mechanisms of the growth inhibition in the presence of suspended solids, including microplastic, may vary, including shading effects and trapping of microalgae in the aggregates and subsequent inhibition of photosynthesis (He et al, 2017;Mao et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Algal growth at environmentally relevant concentrations of suspended solids: implications for microplastic hazard assessment

Gorokhova

Reichelt

2020

Preprint

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Hazard assessment of microplastic is challenging because standard toxicity testing is mostly developed for soluble (at least partially) chemicals. Adverse effects can occur when test organisms are exposed to turbid environments with various particulate matter (PM), both natural, such as sediment, and anthropogenic, such as microplastic. It is, therefore, relevant to compare responses to PM exposure between the microplastic and other suspended solids present at ecologically relevant concentrations; this can be done by using reference materials when assessing hazard potential of microplastics. Here, we evaluated growth inhibition in unicellular alga Raphidocelis subcapitata exposed to different suspended solids (microplastic, kaolin, and cellulose; 10, 100 and 1000 mg/L) during 72 h; algae without added solids were used as a control. In addition, aggregate formation in the exposure systems was analyzed using particle size distribution data. At 10 and 100 mg/L, no adverse growth effects were observed in any treatments; moreover, algal growth was significantly stimulated in kaolin and cellulose treatments compared to the control. However, at 1000 mg/L, all tested materials exerted growth inhibition, with no significant differences among the treatments. The comparison among particle size distributions across the treatments showed that both PM concentration and size of the particle aggregates were significant growth predictors for all materials tested. Therefore, at high concentrations, both natural and anthropogenic materials have similar capacity to cause adverse effects in algal growth inhibition tests, which must be taken into account in hazard assessment of plastic litter.

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Effects of Microplastics on Algae in Receiving Waters

Wang¹,

Fu²,

and³

et al. 2022

Microplastics in Urban Water Management

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Phytoplankton response to polystyrene microplastics: Perspective from an entire growth period

Cited by 511 publications

References 56 publications

Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile?

Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile?

Algal growth at environmentally relevant concentrations of suspended solids: implications for microplastic hazard assessment

Effects of Microplastics on Algae in Receiving Waters

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