A critical review of interactions between microplastics, microalgae and aquatic ecosystem function.

Area of Science:

• Environmental Science
• Ecotoxicology
• Marine Biology

Background:

• Microplastic pollution is pervasive in aquatic environments.
• Microalgae are crucial for aquatic food webs and ecosystem functions.
• Understanding microalgae-microplastic interactions is vital for assessing ecosystem health.

Purpose of the Study:

• To review current knowledge on microalgae-microplastic interactions.
• To summarize the potential effects on microalgae and microplastic fate.
• To identify knowledge gaps and future research directions.

Main Methods:

• Literature review of existing studies on microalgae-microplastic interactions.
• Analysis of research on colonization patterns, biofouling, and toxic effects.
• Synthesis of findings on impacts to algal production and food web dynamics.

Main Results:

• Microalgae colonize microplastics, forming distinct communities.
• Biofouling alters microplastic properties (e.g., density), affecting their movement.
• Microplastics can exert toxic effects on microalgae, impacting growth and photosynthesis.
• Microplastics influence both the quality and quantity of algal production, with potential food web effects.

Conclusions:

• Microalgae-microplastic interactions are complex and reciprocal.
• Predicting ecosystem-level impacts remains challenging.
• Further research is needed to elucidate the full consequences of these interactions.