Micro/nanoplastic-induced stress in microalgae: Latest laboratory evidence and knowledge gaps

Area of Science:

• Environmental Science
• Marine Biology
• Ecotoxicology

Background:

• Micro- and nanoplastics (MNPs) pose a significant global pollution threat.
• Microalgae, vital primary producers, are increasingly impacted by plastic waste.
• Existing mitigation strategies for plastic pollution are insufficient.

Purpose of the Study:

• To critically analyze the effects of MNPs on microalgal populations.
• To review laboratory studies detailing MNPs' impact on microalgae physiology and morphology.
• To provide an updated state-of-the-art assessment of MNP contamination in microalgae.

Main Methods:

• Literature review of available scientific studies.
• Focus on laboratory-based research investigating MNP-microalgae interactions.
• Analysis of effects on microalgal growth, pigment content, photosynthesis, oxidative stress, and morphology.

Main Results:

• MNPs demonstrably affect microalgal physiology, including growth rates and photosynthetic activity.
• Changes in pigment content and increased oxidative stress are observed in microalgae exposed to MNPs.
• Morphological alterations in microalgae due to MNP exposure have been documented.

Conclusions:

• MNP pollution presents a serious risk to microalgal populations and aquatic ecosystems.
• Further research is essential to fully understand the sublethal and chronic effects of MNPs.
• Urgent development and implementation of effective solutions are needed to address MNP contamination.