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Related Concept Videos

Bioremediation00:46

Bioremediation

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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  5. Environmental Sciences
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  9. Soil Physics
  11. Depth-dependent Response Of Soil Microbial Community And Greenhouse Gas Efflux To Polylactic Acid Microplastics And Tidal Cycles In A Mangrove Ecosystem.
  1. Home
  3. Research Domains
  5. Environmental Sciences
  7. Soil Sciences
  9. Soil Physics
  11. Depth-dependent Response Of Soil Microbial Community And Greenhouse Gas Efflux To Polylactic Acid Microplastics And Tidal Cycles In A Mangrove Ecosystem.

Related Experiment Video

A Lipid Extraction and Analysis Method for Characterizing Soil Microbes in Experiments with Many Samples
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A Lipid Extraction and Analysis Method for Characterizing Soil Microbes in Experiments with Many Samples

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Depth-dependent response of soil microbial community and greenhouse gas efflux to polylactic acid microplastics and tidal cycles in a mangrove ecosystem.

Xu Zhou1, Cunde Xiao1, Bingwei Zhang2

  • 1Guangdong Provincial Observation and Research Station for Coupled Human and Natural Systems in Land-ocean Interaction Zone, Beijing Normal University at Zhuhai, Zhuhai 519087, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China.

Journal of Hazardous Materials
|February 23, 2025

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
Greenhouse gas effluxMangrovesMicroplasticsSea level rise

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Polylactic acid (PLA) microplastics accelerate greenhouse gas emissions from mangrove soils, particularly in deeper, anaerobic layers and with increased submersion. This poses a threat to soil carbon and nitrogen pools.

Area of Science:

  • Environmental Science
  • Microbiology
  • Soil Science

Background:

  • Microplastic (MP) impacts on mangrove soil greenhouse gas (GHG) emissions are understudied, especially concerning tidal cycles and varying soil depths.
  • Previous research often overlooked deep soil layers and fluctuating oxygen conditions influenced by tidal inundation.

Purpose of the Study:

  • To investigate the effects of polylactic acid (PLA) microplastics on GHG emissions (CO2 and CH4) and soil microbial communities in mangrove soils.
  • To assess how soil depth and tidal inundation duration influence these impacts.

Main Methods:

  • Analysis of GHG emissions and soil microbial communities from mangrove soils at various depths.
  • Experimental manipulation of tidal inundation duration and addition of PLA microplastics.
Soil layer
  • Assessment of bacterial community structure, diversity, and functional genes related to methanogenesis and sulfate reduction.

    • Main Results:

    • PLA microplastics enhanced CO2 and CH4 release from deep, anaerobic subsoil (100-120 cm).
    • Increased submersion duration led to greater CH4 emissions from topsoil (0-5 cm) due to PLA MPs.
    • PLA MPs altered bacterial community structure and reduced diversity in subsoil, promoting methanogenesis and sulfate reduction.

    Conclusions:

    • PLA microplastics accelerate organic carbon mineralization and carbon release in mangrove soils.
    • These effects are significantly regulated by soil depth and tidal inundation duration.
    • PLA MPs pose a threat to soil carbon and nitrogen pools in vulnerable mangrove ecosystems.