Interactions between microplastics and insects in terrestrial ecosystems-A systematic review and meta-analysis

Area of Science:

• Environmental Science
• Ecotoxicology
• Insect Ecology

Background:

• Microplastics (MPs) are globally present in terrestrial environments.
• Insects interact with MPs through various pathways due to their distribution and habitat diversity.
• Understanding MP-insect interactions is crucial for assessing ecological risks.

Approach:

• A meta-analysis approach was employed, incorporating phylogenetic control and subgroup analysis.
• Data from both field and laboratory experiments were quantitatively synthesized.
• This approach aimed to provide a comprehensive overview of current evidence.

Key Points:

• Insects ingest and transfer MPs through food chains, and MPs adhere to them.
• Insects contribute to MP bio-fragmentation and secondary pollutant generation.
• MP exposure negatively impacts insect behavior (e.g., climbing ability) and health (e.g., oxidative stress).
• Smaller MPs cause more severe effects; exposure duration and concentration showed less significant impact.

Conclusions:

• Insects play a role in the spatial and food chain redistribution of MPs via bio-fragmentation.
• Insects are significantly threatened by microplastic pollution.
• This research enhances understanding of the environmental risks posed by MPs to insect ecosystems.