Heavy metal induced shifts in microbial community composition and interactions with dissolved organic matter in coastal sediments

Wang, Yu; Hu, Yuxing; Liu, Yanting; Chen, Qi; Xu, Jinxin; Zhang, Fei; Mao, Jinhua; Shi, Quan; He, Chen; Cai, Ruanhong; Lønborg, Christian; Liu, Lihua; Guo, Aixing; Jiao, Nianzhi; Zheng, Qiang

doi:10.1016/j.scitotenv.2024.172003

Science of The Total Environment

2024

DOI: 10.1016/j.scitotenv.2024.172003

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Heavy metal induced shifts in microbial community composition and interactions with dissolved organic matter in coastal sediments

Yu Wang,

Yuxing Hu,

Yanting Liu

et al.

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Inhibitory Effect of Combined Exposure to Copper Ions and Polystyrene Microplastics on the Growth of Skeletonema costatum

Liu,

Zhen,

Zhang

et al. 2024

Water

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As two significant pollutants, the increased concentrations of copper ions and microplastics in coastal waters pose a substantial threat to the health of marine ecosystems. This study explored the individual and combined toxic effects of copper ions and microplastics on the marine diatom Skeletonema costatum. The results indicated that copper ions at a concentration of 0.05 mg/L exerted a negative impact on the growth of S. costatum; however, the influence of microplastics on algal cell growth was more complex: there was no significant inhibition of algal cell growth observed within the first 72 h of cultivation, but a pronounced negative effect on cell growth was noted between 72 and 96 h, with high concentrations (10.00 mg/L) of microplastics even causing a premature stagnation phase in algal cell growth. When both pollutants were present simultaneously, their impact on cell growth was similar to that of the microplastic pollution group, yet the growth condition was better than that of the copper ion pollution group. Through investigation of adsorption rates and toxicity mitigation rates, it was found that the adsorption of copper ions by microplastics was a significant reason for the improved growth condition of algal cells in the mixed pollution group compared to the copper ion pollution group. However, in the later stages of cultivation, the inhibitory effect of microspheres on algal cell growth counteracted their mitigating effect on copper ion toxicity. This study provides a reference for evaluating the impact of microplastics and heavy metals on coastal ecosystem health and for revealing the interactions between different pollutants.

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Inhibitory Effect of Combined Exposure to Copper Ions and Polystyrene Microplastics on the Growth of Skeletonema costatum

Liu,

Zhen,

Zhang

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

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Heavy metal induced shifts in microbial community composition and interactions with dissolved organic matter in coastal sediments

Cited by 1 publication

References 95 publications

Inhibitory Effect of Combined Exposure to Copper Ions and Polystyrene Microplastics on the Growth of Skeletonema costatum

Inhibitory Effect of Combined Exposure to Copper Ions and Polystyrene Microplastics on the Growth of Skeletonema costatum

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