Abstract：
Microplastics can be colonized by microorganisms and form plastisphere. However, knowledge of bacterial community succession and the enrichment of antibiotic resistance genes (ARGs) and pathogens on microplastics in aquaculture environments is limited. Here, we conducted a 30-day continuous exposure experiment at an oyster farm. Results showed that the alpha-diversity of communities on most microplastics continuously increased and was higher than in planktonic communities after 14 days. Microplastics could selectively enrich certain bacteria from water which can live a sessile lifestyle and promote colonization by other bacteria. The composition and function of plastisphere communities were distinct from those in the surrounding water and influenced by polymer type and exposure time. Microplastics can enrich ARGs (sul1, qnrS and blaTEM) and harbor potential pathogens (e.g., Pseudomonas aeruginosa). Therefore, microplastic pollution may pose a critical threat to aquaculture ecosystems and human health. Our study provides further insight into the ecological risks of microplastics.
摘要：
微塑料可以被微生物定植并形成质体球。然而,水产养殖环境中细菌群落演替和微塑料上抗生素抗性基因（ARGs）和病原体富集的知识有限。这里,我们在牡蛎养殖场进行了30天的连续暴露实验。结果表明，14天后，大多数微塑料上群落的α多样性持续增加，并且高于浮游群落。微塑料可以从水中选择性地富集某些细菌，这些细菌可以过着固着的生活方式，并促进其他细菌的定植。质体群落的组成和功能与周围水中的组成和功能不同，并受聚合物类型和暴露时间的影响。微塑料可以富集ARG（sul1，qnrS和blaTEM）并携带潜在的病原体（例如，铜绿假单胞菌)。因此,微塑料污染可能对水产养殖生态系统和人类健康构成严重威胁。我们的研究为微塑料的生态风险提供了进一步的见解。
