...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Freshwater science >Longitudinal patterns of microplastic concentration and bacterial assemblages in surface and benthic habitats of an urban river
【24h】

Longitudinal patterns of microplastic concentration and bacterial assemblages in surface and benthic habitats of an urban river

机译：城市河流表面和底栖栖息地的微塑性浓度和细菌组合的纵向模式

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rivers are a major source of microplastic particles (<5 mm) to oceans, but empirical measurements of microplastic movement in freshwater ecosystems are rare. The hard, buoyant surface of microplastic is a novel habitat that selects for unique microbial assemblages in rivers, especially downstream of wastewater treatment plant (WWTP) point sources. We measured microplastic in surface water and benthic habitats 50 m upstream and 50, 305, 1115, and 1900 m downstream of the effluent outfall from a large WWTP in an urban river. We used high-throughput sequencing to measure bacterial assemblages on microplastic from surface and benthic habitats and compared them to bacterial assemblages from seston, water, and sediment. Concentrations of total microplastic and microplastic types (fragment, pellet) in surface water did not change with distance downstream of the WWTP. Thus, microplastic transport showed no net deposition or resuspension. Microplastic concentrations were much higher in the benthic zone than surface water. Benthic deposition appears to be a plastic sink over longer time scales, but subsequent studies are needed to resolve microplastic transport dynamics by particle type, size, and habitat. Composition of microplastic-attached bacterial assemblages differed from that of assemblages in water, seston, and sediment and supports domestic wastewater as a point source of microplastic (e.g., gastrointestinal taxa). Shifts in microplastic assemblages with distance from the WWTP suggest succession toward a stream-like' bacterial assemblage. Future studies are required to quantify the metabolic capacity of microplastic-associated bacteria. Estimates of transport distance, microplastic storage, and microbial interactions are critical to include lotic ecosystems in accountings of global plastic budgets.
机译：河流是微塑性颗粒（<5mm）的主要来源，但淡水生态系统中微塑性运动的经验测量很少见。微塑料的硬，浮力表面是一种新的栖息地，用于选择河流中独特的微生物组装，尤其是废水处理厂（WWTP）点源的下游。我们在城市河流中的大型WWTP中测量了地表水和50米上游和50,305,1115和1900，305,1115和1900米下游的肉体栖息地的微骨质栖息地。我们使用高通量测序来测量来自表面和底栖栖息地的微塑料上的细菌组合，并将它们与SESTON，水和沉积物的细菌组合进行了比较。表面水中总微塑料和微塑料类型（片段，颗粒）的浓度与WWTP下游的距离没有变化。因此，微塑性输送显示净沉积或重悬浮。底座区的微塑料浓度高于地表水。底栖沉积似乎是塑料水槽超过较长的时间尺度，但需要通过颗粒类型，尺寸和栖息地解析微塑性运输动力学。微塑性的细菌组合物的组成与水，塞塞和沉积物中的组合物的组成不同，并且支持国内废水作为微塑料（例如，胃肠毒率）的点源。在微塑性组合中换流，距离WWTP的距离表明朝向物流的“细菌组合”。未来的研究是量化微塑性相关细菌的代谢能力。运输距离，微塑料储存和微生物相互作用的估计至关重要，包括在全球塑料预算的核算中包括众多批发的豪爽生态系统。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号