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Updated: May 28, 2025
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Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris
Published on: July 28, 2018
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Exploring the response of bacterial community functions to microplastic features in lake ecosystems through
Mingjia Li1, Qi Liu1, Jianjun Wang2
1State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, China.
Environmental Research
|February 12, 2025
Summary
Microplastics (MPs) pollution impacts lake bacterial functions. Key MP features like color and type influence human health and nutrient cycling, revealing ecosystem-wide effects.
Area of Science:
- Environmental Science
- Microbiology
- Ecotoxicology
Background:
- Microplastics (MPs) are pervasive environmental contaminants with diverse characteristics.
- The functional consequences of MPs on aquatic bacterial communities are not well understood.
Purpose of the Study:
- To investigate the influence of various microplastic features on bacterial community functions in Taihu Lake.
- To model the relationship between microplastic characteristics and functions related to human health, carbon/nitrogen cycling, and energy metabolism.
Main Methods:
- Identified 33 microplastic features (abundance, shape, color, size, polymer type).
- Constructed 48 machine learning regression models, including XGBoost, to predict bacterial functions.
- Utilized Shapley values to determine the importance of microplastic features.
Main Results:
- XGBoost models achieved an average R² of 0.85 in explaining functional abundance.
- Yellow, fragment, and polyethylene terephthalate (PET) microplastics were identified as key features.
- Yellow and PET MPs negatively impacted human pathogens and chemoheterotrophy, respectively.
- Fragment MPs showed a mixed impact on functions like methanol oxidation.
Conclusions:
- Microplastic pollution significantly affects bacterial community functions, with specific features having distinct impacts.
- Microplastics may alter community structure by selectively filtering functional traits.
- Findings are crucial for understanding the ecological and health implications of microplastic pollution.
