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A bloom of a single bacterium shapes the microbiome during outdoor diatom cultivation collapse
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A bloom of a single bacterium shapes the microbiome during outdoor diatom cultivation collapse
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Journal Article
A bloom of a single bacterium shapes the microbiome during outdoor diatom cultivation collapse
2025
Overview
Aquatic biogeochemical cycles are dictated by the activity of diverse microbes inhabiting the algal microbiome. Outdoor biofuel ponds provide a setting analogous to aquatic algal blooms, where monocultures of fast-growing algae reach high cellular densities. Information on the microbial ecology of this setting is lacking, and so we employed metagenomics and metaproteomics to understand the metabolic roles of bacteria present within four replicated outdoor ponds inoculated with the diatom Phaeodactylum tricornutum . Unexpectedly, after 29 days of cultivation, all four ponds crashed concurrently with a “bloom” of a single taxon assigned to the Kordia bacterial genus. We assessed how this dominant taxon influenced the chemical and microbial fate of the ponds following the crash, with the hypothesis that it was primarily responsible for processing senescent/dead algal biomass and providing the surrounding microbiota with carbon. Overall, these findings provide insight into the roles of microbes specialized in processing algal organic matter and enhance our understanding of biofuel pond microbial ecology.
Publisher
American Society for Microbiology
