Seagrass meadows are vital parts of coastal ecosystems and have been recognised for their ability in climate mitigation and blue carbon storage. Halophila beccarii Asch. contributes to this ecosystem service, but it faces declines due to multiple stressors. This positions them as emerging priorities in conservation efforts to combat environmental degradation. The community structure of bacterial rhizosphere is among the sensitive indicators of environmental health. Past studies looked at multiple factors that modify the community structure and how these changes influence seagrass health. We synthesise these by reviewing those relevant studies of bacterial rhizosphere community-seagrass interactions and how they can be applied to reflect environmental health. Key factors were examined, particularly how nutrient loading, salinity, presence of trace metals, sediment depths and temperature reshaped the rhizosphere. We also reviewed how these drivers, along with light availability and water depths, were synergistic factors that influence the composition of microbial communities. However, unlike other factors, sediment depth directly modulates microbial community density, reflecting the vertical stratification of the meadow environment. Knowledge gaps persist, particularly regarding microbial functional redundancy under combined stresses and the roles of other rhizosphere communities such as fungi, cyanobacteria and microalgae in supporting bacterial resilience. For future work into the microbiome of H. beccarii, it is suggested that efforts focus on a multi-omics integrated analysis and use a standardised metric for comparative studies across the region.
