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Seasonal Macroplastic Distribution and Composition: Insights from Safety Nets for Coastal Management in Recreational Waters of Zhanjiang Bay, China
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This study evaluated safety net systems for intercepting macroplastic debris at Yugang Park Beach in Zhanjiang Bay, China, finding higher debris density in winter (1.8 items/m²) than summer (1.5 items/m²), with transparent low-density polyethylene bags dominating particularly in winter (80.7%). Statistical analysis indicated that plastic size was related to net retention characteristics while tidal influences accounted for major spatial variability, suggesting safety nets are effective tools for macroplastic interception in recreational coastal environments.
Macroplastic pollution is a growing environmental concern, threatening the marine environment. Despite growing awareness of marine plastic pollution, few studies have assessed the effectiveness of in situ technologies such as safety nets for macroplastic interception. This study aims to evaluate the effectiveness of safety net (SN) systems in intercepting macroplastic debris in the different zones of recreational Yugang Park Beach (YPB), Zhanjiang Bay, China. Safety nets were installed at stations representing different hydrodynamic conditions, and macroplastic debris (2.5–80 cm) was collected and analyzed for size, color, and shape characteristics. Two survey comparisons revealed a higher debris density in the winter survey (1.8 ± 0.3 items m2) than in the summer survey (1.5 ± 0.3 items m2). Most debris fell within the 10–40 cm range, with transparent low-density polyethylene plastic bags being the dominant type, particularly in the winter survey (80.7%). Statistical analysis indicated that plastic size was likely related to net retention characteristics, while tidal influences accounted for a major portion of spatial variability in debris accumulation. These findings suggest that SN systems are effective tools for macroplastic interception and could inform evidence-based coastal management strategies to reduce plastic pollution in similar coastal environments.
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