Plastics pollution poses a new threat to marine ecosystems. Mangrove locating at estuary worldwide is probably the most heavily polluted area trapping various plastics transported from terrestrial and nearby marine aquaculture. Expanded polystyrene (EPS) is one of most common plastic debris therein and even in the plastic garbage. Here we showed the bacterial diversity of the polystyrene-degrading microbial community from EPS waste sites from a subtropical mangrove area. After enrichment with EPS, the degradation consortia were obtained. They shared a similar community structure dominated by bacteria of Sphingomonadaceae, Rhodanobacteraceae, Rhizobiaceae, Dermacoccaceae, Rhodocyclaceae, Hyphomicrobiaceae, and Methyloligellaceae. Diverse bacteria standing for the first member of the genera of Novosphingobium, Gordonia, Stappia, Mesobacillus, Alcanivorax, Flexivirga, Cytobacillus, Thioclava, and Thalassospira showed PS degradation capability as a pure culture. Further, PS biodegradation of Gordonia sp. and Novosphingobium sp. was quantified by weight loss, in addition to obvious morphological and structural changes of the PS films observed by SEM, ATR-FTIR, and contact angle analysis. The formation of new oxygen-containing functional groups implied the degradation pathway of oxidation. Although the degradation rates ranged from 2.7% to 7.7% after one month in lab and possibly lower in situ, their role in EPS removal is unneglectable.

塑料污染对海洋生态系统构成了新的威胁。位于世界河口的红树林可能是污染最严重的地区，其中捕获了从陆地和附近海洋水产养殖中运输的各种塑料。发泡聚苯乙烯 (EPS) 是其中乃至塑料垃圾中最常见的塑料碎片之一。在这里，我们展示了来自亚热带红树林地区 EPS 废物场地的聚苯乙烯降解微生物群落的细菌多样性。用EPS富集后，得到降解聚生体。它们具有相似的群落结构，以鞘氨醇单胞菌科、红细菌科、根瘤菌科、皮球菌科、红环菌科、Hyphomicrobiaceae和Methyloligellaceae。代表Novosphingobium、Gordonia、Stappia、Mesobacillus、Alcanivor axe 、Flexivirga、Cytobacillus、Thioclava和Thalassospira属的第一个成员的多种细菌作为纯培养物显示出 PS 降解能力。此外，Gordonia sp的PS生物降解。和新鞘氨醇sp。除了通过 SEM、ATR-FTIR 和接触角分析观察到的 PS 薄膜的明显形态和结构变化外，还通过重量损失进行量化。新的含氧官能团的形成暗示了氧化的降解途径。尽管在实验室一个月后降解率从 2.7% 到 7.7% 不等，并且在原位可能更低，但它们在 EPS 去除中的作用是不可忽视的。