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Simultaneous DNA-RNA Extraction from Coastal Sediments and Quantification of 16S rRNA Genes and Transcripts by Real-time PCR
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Multidecadal increase in plastic particles in coastal ocean sediments.

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Microplastic pollution in Santa Barbara Basin sediments shows an exponential increase since 1945, mirroring global plastic production. This rise serves as a geological marker for the Anthropocene

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Area of Science:

  • Environmental Science
  • Marine Geology
  • Anthropocene Studies

Background:

  • Microplastic pollution is a growing global concern.
  • Understanding historical deposition patterns is crucial for assessing environmental impact.
  • Coastal sediments act as archives of pollution events.

Purpose of the Study:

  • To reconstruct historical microplastic deposition in the Santa Barbara Basin.
  • To correlate microplastic accumulation with socioeconomic factors.
  • To establish microplastic deposition as a proxy for the Great Acceleration.

Main Methods:

  • Analysis of a sediment box core (1834-2009).
  • Visual sorting of sediments for plastic debris.
  • Fourier transform infrared (FTIR) spectroscopy for polymer identification.
  • Correction for sample processing contamination.

Main Results:

  • An exponential increase in microplastic deposition was observed from 1945 to 2009.
  • The doubling time for microplastic deposition was approximately 15 years.
  • Deposition rates correlated with global plastic production and regional population growth.

Conclusions:

  • Post-WWII microplastic accumulation in sediments is a significant indicator of the Great Acceleration.
  • The long-term consequences for benthic ecosystems remain largely unknown.
  • Sedimentary microplastic records provide valuable insights into human impact on marine environments.