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Microbial and metabolic succession on common building materials under high humidity conditions

TitleMicrobial and metabolic succession on common building materials under high humidity conditions
Publication TypeJournal Article
Year of Publication2019
AuthorsLax S., Cardona C., Zhao D, Winton V.J, Goodney G., Gao P., Gottel N., Hartmann E.M, Henry C., Thomas P.M, Kelley S.T, Stephens B., Gilbert J.A
JournalNature Communications
Date Published2019/04
Type of ArticleArticle
ISBN Number2041-1723
Accession NumberWOS:000464654700006
Keywordsbacillus; bacteria; fungi; Green; growth; indoor air; moisture; nigragillin; pseudomonas; risk; Science & Technology - Other Topics

Despite considerable efforts to characterize the microbial ecology of the built environment, the metabolic mechanisms underpinning microbial colonization and successional dynamics remain unclear, particularly at high moisture conditions. Here, we applied bacterial/viral particle counting, qPCR, amplicon sequencing of the genes encoding 16S and ITS rRNA, and metabolomics to longitudinally characterize the ecological dynamics of four common building materials maintained at high humidity. We varied the natural inoculum provided to each material and wet half of the samples to simulate a potable water leak. Wetted materials had higher growth rates and lower alpha diversity compared to non-wetted materials, and wetting described the majority of the variance in bacterial, fungal, and metabolite structure. Inoculation location was weakly associated with bacterial and fungal beta diversity. Material type influenced bacterial and viral particle abundance and bacterial and metabolic (but not fungal) diversity. Metabolites indicative of microbial activity were identified, and they too differed by material.

Short TitleNat. Commun.
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