Changes in microbial community structure of bio-fouled polyolefins over a year-long seawater incubation in Hawai'i

IF 3.6 4区 生物学 Q2 ENVIRONMENTAL SCIENCES
Elizabeth Connors, Laurent Lebreton, Jeff S. Bowman, Sarah-Jeanne Royer
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Abstract

Plastic waste, especially positively buoyant polymers known as polyolefins, are a major component of floating debris in the marine environment. While plastic colonisation by marine microbes is well documented from environmental samples, the succession of marine microbial community structure over longer time scales (> > 1 month) and across different types and shapes of plastic debris is less certain. We analysed 16S rRNA and 18S rRNA amplicon gene sequences from biofilms on polyolefin debris floating in a flow-through seawater tank in Hawai'i to assess differences in microbial succession across the plastic types of polypropylene (PP) and both high-density polyethylene (HDPE) and low-density polyethylene (LDPE) made of different plastic shapes (rod, film and cube) under the same environmental conditions for 1 year. Regardless of type or shape, all plastic debris were dominated by the eukaryotic diatom Nitzschia, and only plastic type was significantly important for bacterial community structure over time (p = 0.005). PE plastics had higher differential abundance when compared to PP for 20 bacterial and eight eukaryotic taxa, including the known plastic degrading bacterial taxon Hyphomonas (p = 0.01). Results from our study provide empirical evidence that plastic type may be more important for bacterial than eukaryotic microbial community succession on polyolefin pollution under similar conditions.

Abstract Image

在夏威夷长达一年的海水培养过程中,生物污损聚烯烃微生物群落结构的变化。
塑料垃圾,尤其是被称为聚烯烃的正浮力聚合物,是海洋环境中漂浮垃圾的主要组成部分。虽然从环境样本中可以很好地记录海洋微生物在塑料中的定殖情况,但在较长的时间范围内(> > 1 个月)以及在不同类型和形状的塑料废弃物中,海洋微生物群落结构的演替情况却不太确定。我们分析了漂浮在夏威夷流经海水的水槽中的聚烯烃碎片上的生物膜的 16S rRNA 和 18S rRNA 扩增子基因序列,以评估在相同环境条件下,不同类型的塑料(聚丙烯 (PP)、高密度聚乙烯 (HDPE) 和低密度聚乙烯 (LDPE),以及不同形状的塑料(棒状、薄膜状和立方体)在一年内的微生物演替差异。无论塑料碎片的类型或形状如何,所有塑料碎片都以真核硅藻 Nitzschia 为主,只有塑料类型对细菌群落结构随时间的变化有显著影响(p = 0.005)。与聚丙烯相比,聚乙烯塑料对 20 个细菌类群和 8 个真核生物类群具有更高的丰度差异,其中包括已知的塑料降解细菌类群水单胞菌(p = 0.01)。我们的研究结果提供了经验证据,表明在类似条件下,塑料类型对聚烯烃污染中细菌微生物群落演替的影响可能比真核微生物群落演替更为重要。
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来源期刊
Environmental Microbiology Reports
Environmental Microbiology Reports ENVIRONMENTAL SCIENCES-MICROBIOLOGY
CiteScore
6.00
自引率
3.00%
发文量
91
审稿时长
3.0 months
期刊介绍: The journal is identical in scope to Environmental Microbiology, shares the same editorial team and submission site, and will apply the same high level acceptance criteria. The two journals will be mutually supportive and evolve side-by-side. Environmental Microbiology Reports provides a high profile vehicle for publication of the most innovative, original and rigorous research in the field. The scope of the Journal encompasses the diversity of current research on microbial processes in the environment, microbial communities, interactions and evolution and includes, but is not limited to, the following: the structure, activities and communal behaviour of microbial communities microbial community genetics and evolutionary processes microbial symbioses, microbial interactions and interactions with plants, animals and abiotic factors microbes in the tree of life, microbial diversification and evolution population biology and clonal structure microbial metabolic and structural diversity microbial physiology, growth and survival microbes and surfaces, adhesion and biofouling responses to environmental signals and stress factors modelling and theory development pollution microbiology extremophiles and life in extreme and unusual little-explored habitats element cycles and biogeochemical processes, primary and secondary production microbes in a changing world, microbially-influenced global changes evolution and diversity of archaeal and bacterial viruses new technological developments in microbial ecology and evolution, in particular for the study of activities of microbial communities, non-culturable microorganisms and emerging pathogens.
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