Changes in the bacterial rare biosphere after permanent application of composted tannery sludge in a tropical soil

Ademir Sergio Ferreira Araujo*, Xiu Jia, Ana Roberta Lima Miranda, Arthur Prudêncio de Araujo Pereira, Vania Maria Maciel Melo, Sandra Mara Barbosa Rocha, Romário Martins Costa, Talyta Carine da Silva Saraiva, Lucas William Mendes, Joana Falcão Salles

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

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Composted tannery sludge (CTS) promotes shifts in soil chemical properties, affecting microbial communities. Although the effect of CTS application on the bacterial community has been studied, it is unclear whether this impact discriminates between the dominant and rare species. This present study investigated how the dominant and rare bacterial communities respond over time to different concentrations of CTS application (0, 2.5, 5, 10, and 20 tons/ha) for 180 days. The richness of operational taxonomic units (OTU) was 30-fold higher in the rare than in the dominant biosphere. While some phyla shifted their relative abundance differently in the dominant and rare biosphere, some genera increased their relative abundance under higher CTS concentrations, such as Nocardioides (∼100%), Rubrobacter (∼300%), and Nordella (∼400%). Undominated processes largely governed the dominant biosphere (76.97%), followed by homogeneous (12.51%) and variable (8.03%) selection, and to a lesser extent, the dispersal limitation (2.48%). The rare biosphere was driven by the CTS application as evidenced by the exclusively homogeneous selection (100%). This study showed that the rare biosphere was more sensitive to changes in soil chemical parameters due to CTS application, which evidences the importance explore this portion of the bacterial community for its biotechnological use in contaminated soils.

Originele taal-2English
Aantal pagina's8
StatusPublished - feb.-2023

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