Related Experiment Video
Updated: May 23, 2026
05:31
Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris
Published on: July 28, 2018
Hydrodynamic controls on microplastic transport in tidal estuaries: A process-based review and conceptual framework
Ravena Santiago Alves1, Michael Barbosa Viana1
1Institute of Marine Sciences (LABOMAR), Federal University of Ceará (UFC), Avenida da Abolição, 3207, Meireles, 60165-081, Fortaleza, Ceará, Brazil.
Marine Pollution Bulletin
|May 21, 2026
Summary
Microplastic abundance in estuaries varies with tidal cycles. Hydrodynamic factors like river discharge and tidal currents significantly influence microplastic transport, retention, and export, impacting estuarine ecosystems.
Area of Science:
- Environmental Science
- Oceanography
- Ecotoxicology
Background:
- Microplastic pollution is a growing concern in estuarine environments.
- Tidal cycles significantly influence estuarine hydrodynamics and particle transport.
- Current understanding of microplastic dynamics in estuaries lacks integration across studies.
Purpose of the Study:
- To critically review the influence of tidal dynamics on microplastic abundance and characteristics in estuaries.
- To analyze hydrodynamic mechanisms controlling microplastic transport, retention, and redistribution.
- To propose a conceptual framework and recommendations for future research.
Main Methods:
- Literature review and critical analysis of existing studies on microplastics in estuarine waters.
- Synthesis of data on microplastic responses to tidal phases, amplitude, and estuarine hydrodynamics.
- Development of a conceptual framework integrating hydrodynamic controls and transport regimes.
Main Results:
- Microplastic responses to tidal forcing are highly variable, influenced by tidal asymmetry and estuarine conditions.
- Ebb-dominated regimes favor export, while flood-dominated regimes promote retention and recirculation.
- Spring tides increase transport and resuspension; neap tides favor deposition. Tidal dynamics minimally affect microplastic characteristics.
Conclusions:
- Tidal dynamics are crucial but complex drivers of microplastic fate in estuaries.
- A standardized approach and conceptual framework are needed for comparable estuarine microplastic research.
- Understanding these dynamics is vital for managing microplastic pollution in coastal ecosystems.
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