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Seagrass beds acting as a trap of microplastics - Emerging hotspot in the coastal region?

Environmental Pollution 2019 215 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Yuzhou Huang, Xi Xiao, Caicai Xu, Yuvna Devi Perianen, Jing Hu, Marianne Holmer

Summary

Seagrass beds in coastal waters were found to trap and accumulate microplastics at higher concentrations than surrounding unvegetated sediments, acting as effective sinks for plastic particles due to their dense canopy structure. This positions seagrass meadows as emerging hotspots of microplastic contamination in coastal ecosystems.

Study Type Environmental

Microplastics is an emerging environmental problem in the world. However, presence and fate of microplastics in seagrass meadows are barely known. In this study, the abundance and diversity of microplastic from Enhalus acodoides vegetated sites and bare sites were quantified and characterized in Xincun bay and Li'an bay, Hainan, China. Microplastics ranged from 80.0 to 884.5 particles per kg of dry sediment, and fibers were the dominant shape. The most frequent colors of microplastics were blue, transparent and black. The dominant size of microplastics was in the range of 125-250 μm. And the seagrass sediments were enriched in microplastics 2.1 and 2.9 times for Xincun bay and Li'an bay, respectively. The trap effect of seagrass was non-selective regarding the shape, color and size of microplastics. High anthropogenic pollution and poor beach management may contribute to higher concentrations of microplastics in Li'an bay.

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