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Do tidal fluctuations affect microplastics distribution and composition in coastal waters?
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This study investigated whether tidal fluctuations affect the distribution and composition of microplastics in megatidal coastal waters. Researchers collected water samples across complete tidal cycles during spring and neap tides, providing insights into how natural hydrodynamic processes influence microplastic transport and concentration patterns.
The hydro-meteorological conditions in marine environments are recognized to have a major impact on the transport and dispersion of microplastics (MP), although their precise effects remain poorly understood. This study investigates the effects of tidal fluctuations on MP abundance and composition in a megatidal coastal water. Waters samples were collected every ninety minutes over the course of two complete tidal cycles - one during spring tide and another during neap tide. There were no significant disparities in term of abondance, size, and composition of MPs between the samples collected during the two tidal cycles. Nevertheless, MP abundance and characteristics (morphology, size and polymer types) can be influenced over the course of a complete tidal cycle due to the impact of tidal currents and water height. This study highlights the need to consider the fluctuations of the tidal cycle when planning in-situ surveys to better assess MP pollution in coastal environments.
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Researchers investigated how tidal fluctuation affects the vertical distribution and river-sea transport of microplastics in a subtropical estuary in China, finding that tidal dynamics significantly influence microplastic size, concentration, and movement between river and marine environments.
Dynamic characteristics of microplastics under tidal influence and potential indirect monitoring methods
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Researchers investigated microplastic dynamics in tidal river channels and found that abundance fluctuated significantly with tidal cycles, increasing during flood tides and decreasing during ebb tides, with a strong linear relationship between microplastic levels and water flow rates.
Suspended microplastics during a tidal cycle in sea-surface waters around Chao Phraya River mouth, Thailand
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Researchers sampled microplastics from surface waters around the Chao Phraya River mouth in Thailand during low and high tides. Microplastic concentrations were significantly lower during spring tide than neap tide, suggesting that tidal dynamics play an important role in how plastic particles are distributed and diluted in coastal waters.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.