Ocean acidification has a strong effect on communities living on plastic in mesocosms

• Published in: Limnology and oceanography letters Vol. 8; no. 4; pp. 675 - 684
• Main Authors: Zhang, Xu, Zhang, Ping, Deng, Zichao, Huang, Ruiping, Zhang, Di, Tian, Yang, Wang, Na, Li, He, Wang, Xuyang, Jiang, Xiaowen, Sun, Jiazhen, Fu, Qianqian, Yi, Xiangqi, Qu, Liming, Zhou, Cong, Rao, Yuming, Zeng, Xiaorong, Hall‐Spencer, Jason M., Gao, Guang, Gao, Kunshan, Lin, Xin
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01.08.2023; Wiley
• Subjects: Acidification; Animal parasites; Biodiversity; Carbon dioxide; Cellulose acetate; Discriminant analysis; Emissions; Environmental conditions; Eutrophic waters; Eutrophication; Investigations; Nitrates; Nutrient cycles; Ocean acidification; Pathogens; Plastics; Polyethylene terephthalate; Relative abundance; Seawater; China
• ISSN: 2378-2242; 2378-2242
• DOI: 10.1002/lol2.10329

We conducted a mesocosm experiment to examine how ocean acidification (OA) affects communities of prokaryotes and eukaryotes growing on single‐use drinking bottles in subtropical eutrophic waters of the East China Sea. Based on 16S rDNA gene sequencing, simulated high CO2 significantly altered the prokaryotic community, with the relative abundance of the phylum Planctomycetota increasing by 49%. Under high CO2, prokaryotes in the plastisphere had enhanced nitrogen dissimilation and ureolysis, raising the possibility that OA may modify nutrient cycling in subtropical eutrophic waters. The relative abundance of pathogenic and animal parasite bacteria also increased under simulated high CO2. Our results show that elevated CO2 levels significantly affected several animal taxa based on 18S rDNA gene sequencing. For example, Mayorella amoebae were highly resistant, whereas Labyrinthula were sensitive to OA. Thus, OA may alter plastisphere food chains in subtropical eutrophic waters.