Bacterioplankton community assembly in migratory fish habitat: a case study of the southern East China Sea

• Published in: Environmental science and pollution research international 2022-05, Vol.29 (22), p.33725-33736
• Main Authors: Zheng, Shizhan, Zhou, Shouheng, Lukwambe, Betina, Nicholaus, Regan, Yang, Wen, Zheng, Zhongming
• Format: Article
• Language: English
• Subjects: Animals; Aquatic Organisms; Aquatic Pollution; Assembly; Atmospheric Protection/Air Quality Control/Air Pollution; Bacterioplankton; China; Earth and Environmental Science; Ecological function; Ecosystem; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Fish; Fish migration; Fishes - genetics; Gene sequencing; Habitats; Modules; Network analysis; Nutrients; Redundancy; Research Article; RNA, Ribosomal, 16S - genetics; rRNA 16S; Structure-function relationships; Waste Water Technology; Water Management; Water Pollution Control; Water temperature
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-022-18604-5

The health conditions of fish habitats, which affect fish health, can be reflected by the structure and ecological function of the bacterioplankton community to some extent. However, studies on bacterioplankton in the whole habitat of migratory fish, which can be divided into different functional types, are still limited. To fill this gap, we investigated the characteristics of bacterioplankton communities in three habitat types in a typical migratory fish habitat, the southern East China Sea, using 16S rRNA gene amplicon sequencing. Our study showed that the structure of the bacterioplankton community was significantly divided according to habitat type. Dispersal limitation and heterogeneous selection both contributed to the bacterioplankton community assembly through estimation of β nearest taxon index (βNTI), and redundancy analysis (RDA) further explained that the water temperature, salinity, and nutrients were deterministic factors responsible for differences in the bacterioplankton community. Additionally, different ecological functional modules dominated by functional bacterioplankton in different habitat types were identified by co-occurrence network analysis, including a hydrocarbon-degrading module dominated by Psychrobacter and health-related modules containing Ascidiaceihabitans and Pseudoalteromonas . Based on the composition of environmental bacterioplankton, our findings provide a theoretical basis for understanding the distribution of different habitat types in the southern East China Sea during the breeding period of migratory fish.