Seasonal and vertical turnover of bacterioplankton communities in an estuarine-influenced subtropical coastal system
This project investigates seasonal and vertical variation in bacterioplankton communities in an estuarine-influenced subtropical coastal area adjacent to the Itajai-Acu estuary, southern Brazil. The study comprises 36 depth-resolved seawater samples collected between July 2023 and August 2024 from surface and bottom waters at a fixed coastal station. Community profiling was performed using environmental DNA-based full-length 16S rRNA amplicon sequencing on the Oxford Nanopore MinION platform using Flongle flow cells. The dataset was generated to characterize temporal and depth-related shifts in bacterioplankton composition and to evaluate associations with physicochemical gradients, including temperature, salinity, dissolved oxygen, nutrients, and chlorophyll-a.