Bacterial life-history trade-offs under biodegradable and conventional microplastics in cinnamon and lime concretion black soils
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View abstract on PubMed
Summary
This summary is machine-generated.Microplastics (MPs) significantly alter soil bacterial communities, with biodegradable poly(butylene succinate) (PBS) posing a greater risk. These changes impact soil health and carbon cycling.
Area Of Science
- Environmental Science
- Microbiology
- Soil Science
Background
- Microplastics (MPs) are a growing global pollutant, with soils acting as a major sink.
- The impact of diverse MPs on soil bacterial life-history strategies and adaptive responses across different soil types is not well understood.
Purpose Of The Study
- To investigate the adaptive signatures of soil bacterial communities exposed to biodegradable and conventional MPs in two distinct soil types.
- To determine how MPs affect bacterial diversity, community structure, functional profiles, life-history strategies, resistance, and network stability.
Main Methods
- Exposure of bacterial communities in cinnamon soil and lime concretion black soil to two biodegradable and four conventional MPs.
- Analysis of bacterial diversity, composition, functional profiles, life-history strategies, resistance, and co-occurrence networks.
Main Results
- MP exposure significantly altered bacterial diversity, composition, functional profiles, life-history strategies, resistance, and co-occurrence networks, with soil type being a key factor.
- Poly(butylene succinate) (PBS), a biodegradable MP, had a more pronounced effect than other MPs, promoting copiotrophs and reducing bacterial resistance and richness.
- MP addition, especially PBS, decreased the stability of bacterial co-occurrence networks, potentially disrupting soil carbon cycling.
Conclusions
- Soil type critically influences bacterial community responses to MP pollution.
- Biodegradable PBS MPs pose a significant risk by altering bacterial life-history strategies and reducing community stability.
- These MP-induced changes threaten soil carbon sequestration and climate regulation, necessitating risk assessment and management strategies.
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