深圳大鹏半岛近岸微塑料季节分布特征及潜在影响因素
Potential factors to seasonal distribution characteristics of microplastics in Dapeng peninsula coastal sea
李佳蔚 1孙文郡 2王裕东 2潘晓峰 2覃秀姣 2黎栩霞 2刘洋 1戚瑞敏 1唐圆圆1
作者信息
- 1. 南方科技大学环境科学与工程学院 广东深圳 518055
- 2. 广东省深圳生态环境监测中心站 广东深圳 518049
- 折叠
摘要
本文通过分析深圳大鹏半岛入海河流、近岸表层海水与沉积物的微塑料丰度、形状和成分,结合研究区域的用地空间规划、海洋活动类型、微塑料空间分布特征等信息,探究了大鹏半岛周边陆地和海洋活动对近岸海域次生微塑料季节性分布的复合影响.夏季,大鹏半岛周边入海河流截断面的微塑料丰度为 0.30～12.95个/L,平均值为 2.53个/L;表层海水的微塑料丰度变化范围为 0.02～1.30个/L,平均值为 0.27个/L.秋季,入海河流截断面的微塑料丰度为 0.10～0.75个/L,平均值为 0.36个/L;近岸表层海水的微塑料丰度为 0.02～5.24个/L,平均值为 0.70个/L.结果表明,夏季,近岸海域微塑料分布主要受到丰水期陆地人类活动的影响,沿河岸的微塑料排放归因于居住用地、物流仓储和工业用地等来源.而在秋季枯水期,陆地和海洋活动的复合影响变得更加突出.值得注意的是,除陆地人类活动影响外,在近岸海域表层水体和沉积物中观察到的微塑料丰度升高还与渔业和航运活动的排放有关.此外,这些微塑料更有可能在近岸沉积物中积累.
Abstract
In this study,we conducted a comprehensive analysis of the abundance,shape,and composition of microplastics in rivers,nearshore surface seawater,and sediments around the Dapeng peninsula in Shenzhen.Our investigation aimed to explore the combined effects of both land and marine activities on the seasonal distribution of secondary microplastics in the coastal waters.During the summer,microplastic abundance in the cross-sections of rivers surrounding the Dapeng peninsula ranged from 0.30 to 12.95 particles/L,with an average value of approximately 2.53 particles/L.In the seawater surface,the abundance varied from 0.02 to 1.30 particles/L,averaging around 0.27 particles/L.Moving into the autumn,microplastic abundance in river cross-sections was from 0.10 to 0.75 particles/L,with an average of 0.36 particles/L.Meanwhile,the abundance in coastal seawater surfaces ranged from 0.02 to 5.24 particles/L,averaging about 0.70 particles/L.Our findings suggest that the types and distribution patterns of microplastics in coastal waters are primarily influenced by terrestrial human activities during the summer wet season.During the autumn dry season,conversely,the combined effects of both land and marine activities become more prominent.High abundance of microplastics along riverbanks is attributed to sources such as residential areas,storage and transportation,and industrial land.Elevated microplastic levels in the nearshore seawater and sediments are linked to emissions from fishing and ship transportation activities,and with a higher likelihood of accumulation in seabed sediments nearshore.
关键词
微塑料/近岸海域/季节分布/海洋塑料排放/近岸污染物沉积Key words
microplastics/near-shore waters/seasonal distribution/ocean plastic emissions/nearshore contaminant deposition引用本文复制引用
基金项目
国家自然科学基金项目(41977329)
国家自然科学基金项目(42277403)
出版年
2024
NETL
NSTL
万方数据