AI Article Synopsis
- Phycospheric bacteria are vital for microalgae survival, with potential uses in managing harmful algal blooms yet to be confirmed.
- Research identified two groups of phycospheric bacteria in Cyclotella sp.: high nucleic acid (HNA) and low nucleic acid (LNA), showing differences in diversity and ecological functions based on 16S rRNA and metagenomic sequencing.
- The study found that restoring phycospheric bacterioplankton enhances microalgae growth and strengthens their resilience, suggesting that disrupting these bacteria could limit microalgae proliferation.
Article Abstract
Phycospheric bacteria play a crucial role in the survival of microalgae. However, the potential of using the growth regulation and community structure modulation of phycospheric bacteria to prevent the occurrence of blooms is yet to be verified. The phycospheric bacterioplankton of Cyclotella sp. can be categorized into HNA (high nucleic acid) bacteria and LNA (low nucleic acid) bacteria. 16S rRNA sequencing showed that the HNA bacteria exhibited higher α-diversity compared to the LNA bacteria, and the microbial community composition also exhibited variations. Metagenomic sequencing further indicated the distinct ecological functions between HNA and LNA bacteria. Furthermore, the study showcased the restorative capacity of the phycospheric bacterioplankton. Biomass analysis revealed that the recovery of phycospheric bacterioplankton positively influenced the microalgae growth, thus affirming the significance of phycospheric bacterioplankton to microalgae. The community structure of phycospheric bacterioplankton demonstrated a notable decrease in the abundance of restored LNA core bacteria. Additionally, the restored phycospheric bacterioplankton exhibited a more complex co-occurrence network structure, resulting in decreased resistance and sensitivity of microalgae to adverse environments. The presence of phycospheric bacterioplankton provides a protective shield for microalgae, and thus destabilizing or removing phycospheric bacterioplankton may effectively inhibit growth of microalgae.
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| http://dx.doi.org/10.1016/j.envres.2023.117060 | DOI Listing |
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- Phycospheric bacteria are vital for microalgae survival, with potential uses in managing harmful algal blooms yet to be confirmed.
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