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Concentration dependent toxicity of microplastics to marine microalgae
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A dose-response study of microplastic effects on marine microalgae found concentration-dependent toxicity across multiple species, with higher MP concentrations reducing growth rates, photosynthesis efficiency, and chlorophyll content, confirming that microplastics pose risks to the base of marine food webs.
The widespread distribution of microplastics (MPs) in the environment poses a potential threat to ecosystems. Microalgae are key primary producers in marine ecosystems, and the algae is more sensitive to changes in the ecological environment. Therefore, assessing the toxicity of MPs pollution to microalgae is critically important. In this study, polystyrene (PS) MPs (1 μm) was selected to carry out exposure experiments on Chlorella sp. with the treatment concentrations of 10 and 50 mg/L. At each time period of the PS MPs treatment group, the 50 mg/L exposure level inhibited the growth of Chlorella sp., which was higher than that of 10 mg/L. Experimental data demonstrated the toxicity of PS MPs on Chlorella sp. was concentration-dependent. The maximum growth inhibition rate of PS MPs on Chlorella sp. reached 14% (10 mg/L) and 34.3% (50 mg/L). This research is of great significance for assessing the ecotoxicity of MPs in aquatic ecosystems.
More Papers Like This
Concentration dependent toxicity of microplastics to marine microalgae
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Researchers exposed the marine microalga Chlorella sp. to polystyrene microplastics at concentrations of 10 and 50 mg/L, finding that even low concentrations inhibited growth and disrupted photosynthesis, while higher concentrations caused more pronounced oxidative stress.
Microplastic toxicity in marine microalgae: an ecotoxicological synthesis of experimental biological responses
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This review summarizes 43 experimental studies on how microplastics affect marine microalgae, tiny ocean organisms that form the base of marine food webs. Researchers found most studies focused on polystyrene and polyethylene particles, measuring effects on growth, cell stress, and photosynthesis. Gaps remain in studying DNA damage, particle clumping, and long-term, realistic exposure conditions.
Comparative assessment of MP effects on pigment composition and lipid profiles in three marine microalgae
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Researchers exposed three marine microalgae species to polyethylene and polypropylene microplastics and found that the particles altered pigment composition and lipid profiles in species-specific ways. Microplastic exposure generally reduced photosynthetic pigments and shifted fatty acid profiles, with effects varying depending on the polymer type and concentration ratio. The study suggests that microplastic pollution could disrupt the biochemistry of ecologically and commercially important microalgae at the base of marine food webs.
Effects of microplastics on microalgae populations: A critical review
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This critical review examines how microplastics affect microalgae populations, which are essential primary producers at the base of aquatic food webs. Researchers found that microplastics can reduce algal growth, impair photosynthesis, and cause oxidative stress, with effects varying by plastic type, size, and concentration. The study highlights that harm to microalgae from plastic pollution could have cascading effects throughout entire aquatic ecosystems.
Effects of microplastics on freshwater and marine microalgae
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This book chapter reviews the effects of microplastics on freshwater and marine microalgae, covering how different plastic types and sizes affect algal growth, photosynthesis, and reproduction. Microalgae form the base of aquatic food webs, so plastic-induced disruption to algal communities could have cascading effects throughout ecosystems.
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