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Ocean current modulation of the spatial distribution of microplastics in the surface sediments of the Beibu Gulf, China
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Researchers conducted a large-scale survey of microplastics in seafloor sediments of the Beibu Gulf in China and found that ocean currents play a major role in where microplastics accumulate. The study provides important data on how water circulation patterns transport and concentrate microplastic pollution in coastal marine environments.
Microplastic pollution, a major global environmental issue, is gaining heightened attention worldwide. Marginal seas are particularly susceptible to microplastic contamination, yet data on microplastics in marine sediments remain scarce, especially in the Beibu Gulf. This study presents a large-scale investigation of microplastics in the surface sediments of the Beibu Gulf to deciphering their distribution, sources and risk to marginal seas ecosystems. The results reveal widespread microplastic contamination, with an average abundance of 391 ± 27 items/kg in sediments. The spatial variability of microplastic abundance was significant, with lower levels in the western Beibu Gulf and higher concentrations in the northeastern and southeastern regions. The spatial distribution of microplastics was largely driven by geological features, hydrodynamic conditions, and human activity, with minimal influence from local environmental factors such as water depth, sediment grain size, organic carbon content, and sediment types. The pollution load index (PLI) suggests a low level of microplastic contamination, but the polymer hazard index (PHI) identified a high ecological risk, likely due to the presence of PVC, a polymer with higher chemical toxicity. Our findings highlight the significant role of hydrodynamic processes in determining microplastic distribution in the Beibu Gulf. These insights enhance our understanding of microplastic dispersal and its governing factors in semi-enclosed marginal seas, providing foundation for targeted pollution control strategies.
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Distribution pattern and influencing factors for the microplastics in continental shelf, slope, and deep-sea surface sediments from the South China Sea
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Researchers investigated microplastic pollution in surface sediments across the continental shelf, slope, and deep-sea floor of the northern South China Sea. The study found an average abundance of about 131 particles per kilogram, with distribution patterns influenced by ocean currents, water depth, and proximity to river inputs.
Microplastic occurrence and hydrodynamic-sedimentary driving effects in the Bohai Strait region of China
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This study investigated microplastic occurrence and distribution in the Bohai Sea, examining how hydrodynamic and sedimentary processes drive the spatial pattern of microplastic accumulation. Current dynamics and sedimentation rates emerged as key controls on where microplastics concentrate.
Microplastic pollution and regulating factors in the surface sediment of the Xuande Atolls in the South China Sea
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Scientists found microplastic pollution in seafloor sediments at the remote Xuande Atolls in the South China Sea, and identified water currents and human activity as key drivers of where the particles accumulate. The presence of microplastics in such a distant marine area underscores how pervasive plastic pollution has become in ocean environments far from population centers.
Distribution characteristics of microplastics in the seawater and sediment: A case study in Jiaozhou Bay, China
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Researchers surveyed microplastic pollution in the seawater and sediments of Jiaozhou Bay, a semi-enclosed bay in China heavily impacted by human activity. They found microplastic concentrations of 20 to 120 items per cubic meter in seawater and 7 to 25 items per kilogram in sediment, with fibers being the dominant shape and PET the most common polymer. The study found positive correlations between microplastic levels in water and sediment, and higher concentrations near areas with residual ocean currents.
Fate and mass budget of microplastic in the Beibu Gulf, the northern South China sea
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Researchers mapped the distribution and mass budget of microplastics across the Beibu Gulf in the northern South China Sea, sampling both water and sediment. They found microplastics in all samples, with sediments containing the highest concentrations and river input being a major source. The study provides a comprehensive picture of how microplastics accumulate and move through a semi-enclosed tropical marine ecosystem.
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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.