Chemically stressed bacterial communities in anaerobic digesters exhibit resilience and ecological flexibility
| Autor: | Schwan, Benjamin, Abendroth, Christian, Latorre-Pérez, Adriel, Porcar, Manuel, Vilanova, Cristina, Dornack, Christina |
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| Přispěvatelé: | Federal Ministry of Economics and Technology (Germany), Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Anaerobic digestion is a technology known for its potential in terms of methane production. During the digestion process, multiple metabolites of high value are synthesized. However, recent works have demonstrated the high robustness and resilience of the involved microbiomes; these attributes make it difficult to manipulate them in such a way that a specific metabolite is predominantly produced. Therefore, an exact understanding of the manipulability of anaerobic microbiomes may open up a treasure box for bio-based industries. In the present work, the effect of nalidixic acid, γ-aminobutyric acid (GABA), and sodium phosphate on the microbiome of digested sewage sludge from a water treatment plant fed with glucose was investigated. Despite of the induced process perturbations, high stability was observed at the phylum level. However, strong variations were observed at the genus level, especially for the genera Trichococcus, Candidatus Caldatribacterium, and Phascolarctobacterium. Ecological interactions were analyzed based on the Lotka–Volterra model for Trichococcus, Rikenellaceae DMER64, Sedimentibacter, Candidatus Cloacimonas, Smithella, Cloacimonadaceae W5 and Longilinea. These genera dynamically shifted among positive, negative or no correlation, depending on the applied stressor, which indicates a surprisingly dynamic behavior. Globally, the presented work suggests a massive resilience and stability of the methanogenic communities coupled with a surprising flexibility of the particular microbial key players involved in the process. We are grateful for funding of the work by the German Ministry of Economic Affairs and Energy (grant numbers 16KN070128 and 16KN070126). Moreover, we thank the Spanish Ministry of Science, Innovation and Universities for funding the Ph.D. of Adriel Latorre-Pérrez (Doctorado Industrial Fellowship, reference DI-17-09613). Finally, we are grateful for open access funding by the publication fund of the TU Dresden and for funding by the European Union through the BioRoboost project, H2020-NMBP-TR-IND-2018-2020/BIOTEC-01-2018 (CSA), Project ID 210491758. |
| Databáze: | OpenAIRE |
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