Published: May 8, 2024

River estuaries are dynamic and complex ecosystems influenced by various natural processes, including climatic fluctuations anthropogenic activities. The Pearl estuary (PRE), one of the largest in China, receives significant land-based pollutants due to its proximity densely populated areas urban development. This study aimed characterize composition, diversity, distribution patterns sediment microbial communities (Bacteria, Archaea, Eukaryotes) investigated connection with environmental parameters within PRE adjacent shelf. Physicochemical conditions, such as oxygen levels, nitrogen compounds, carbon content, were analyzed. found that community structure was mainly site location core depth, which together explained approximately 67% variation each kingdom. Sites depths varied properties organic matter content redox leading distinct groups associated specific chemical sediment, notably C/N ratio NH4+ concentration. Despite these differences, certain dominant taxonomic consistently present across all sites: Gammaproteobacteria Bacteria; Bathyarchaeia, Nitrososphaeria, Thermoplasmata Archaea; SAR Eukaryota. diversity index highest bacteria kingdom, while lowest values observed at P03 three kingdoms significantly different from other sites. Overall, this underscores critical role shaping biogeochemical processes estuarine environments their sensitivity changes, providing valuable information for managing preserving health coastal ecosystems.

Language: Английский