干旱区生态环境知识资源中心(Arid): Freshwater algal biofilm assemblages are more effective than invertebrate assemblages at aggregating microplastics

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DOI	10.1016/j.heliyon.2023.e23239
	Freshwater algal biofilm assemblages are more effective than invertebrate assemblages at aggregating microplastics
	Barnes, Joseph; Balestra, Barbara; Knee, Karen L.; Frederick, J. Adam; Landaverde, Natalie; Meiller, Jesse
通讯作者	Meiller, J
来源期刊	HELIYON
EISSN	2405-8440
出版年	2024
卷号	10 期号:1
英文摘要	Microplastics, plastic particles less than 5 mm in length, are a ubiquitous pollutant in the environment, but research on freshwater microplastic contamination is lacking. A possible fate of microplastics in freshwater environments is to become entangled or aggregated in biofilms, which are matrices of algae, bacteria, and micro invertebrates that grow on underwater surfaces, following a progression of settling algae, periphyton, and finally invertebrate colonization. This in-situ study at the Oasis Marina at National Harbor in Oxon Hill, Maryland, examined how the taxonomic assemblages of freshwater biofilms in the Potomac River are associated with the number of microplastics aggregated within them. Aluminum discs, acting as artificial substrate for biofilm growth, were deployed at the water's surface and at 2 m depth to survey biofilm assemblage and were sampled monthly from October 2021-October 2022. Microplastic abun-dances in the water column were measured every 2 weeks over the same period. Spatial and temporal trends in trapped and suspended microplastics, water quality parameters (temperature, dissolved oxygen, pH, salinity, conductivity, turbidity, ammonia, nitrate, and phosphate), and biofilm assemblages were measured and compared to explore factors affecting the abundance of microplastics and their partitioning between the water column and biofilms. Water quality had no measurable impact on microplastic abundance in the water column at either depth, but tem-perature was negatively correlated to microplastic abundance in biofilms. As the weather warmed and biofilms progressed to invertebrate settling, they tended to contain fewer microplastics. This may have occurred because less biologically rich biofilms, primarily composed of unicellular algal colonies, provide a favorable surface for microplastic deposition. Understanding seasonal changes in biofilm assemblage and microplastic abundance may help track the fate of microplastics in freshwater systems, particularly in their interactions with lower trophic organisms.
英文关键词	Freshwater Rivers Microplastics Biofilms Potomac
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:001135907900001
WOS关键词	MARINE ; SEDIMENTS ; DIVERSITY ; RIVER
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404005
推荐引用方式 GB/T 7714	Barnes, Joseph,Balestra, Barbara,Knee, Karen L.,et al. Freshwater algal biofilm assemblages are more effective than invertebrate assemblages at aggregating microplastics[J],2024,10(1).
APA	Barnes, Joseph,Balestra, Barbara,Knee, Karen L.,Frederick, J. Adam,Landaverde, Natalie,&Meiller, Jesse.(2024).Freshwater algal biofilm assemblages are more effective than invertebrate assemblages at aggregating microplastics.HELIYON,10(1).
MLA	Barnes, Joseph,et al."Freshwater algal biofilm assemblages are more effective than invertebrate assemblages at aggregating microplastics".HELIYON 10.1(2024).