Deterministic Assembly and Diversity Gradient Altered the Biofilm Community Performances of Bioreactors
- 7 January 2019
- journal article
- research article
- Published by American Chemical Society (ACS) in Environmental Science & Technology
- Vol. 53 (3), 1315-1324
- https://doi.org/10.1021/acs.est.8b06044
Abstract
Community assembly process (determinism vs stochasticity) determines the composition and diversity of a microbial community, and then shapes its functions. Understanding this complex process and its relationship to the community functions becomes a very important task for the applications of microbial biotechnology. In this study, we applied microbial electrolysis cells (MECs) with moderate species numbers and easily tractable functions as a model ecosystem, and constructed a series of biofilm communities with gradient biodiversity to examine the roles of community assembly in determining microbial community structure and functions. After stable biofilms formed, the best MEC reactor performances (e.g., gas productivity, total energy efficiency) were achieved in the group in which biofilms had the second highest a-diversity, and biofilms with even lower diversity showed declining performance. Null model analyses indicated that both deterministic and stochastic assembly played roles in the formation of biofilm communities. When deterministic assembly dominates this formation, the higher diversity of the biofilm community would generally show better reactor performance. However, when the stochasticity dominates the assembly process, the bioreactor performance would decline. This study provides novel evidence that the assembly mechanism could be one of the key processes to shift the functions, and proposes an important guidance for selecting the most efficient microorganisms for environmental biotechnologies.Keywords
Funding Information
- Chinese Academy of Sciences (100 talent program, KFZD-SW-219-3, QYZDB-SSW-DQC026)
- Guangdong Institute of Microbiology (SKLAM001-2015)
- Guangdong Academy of Sciences (2017GDASCX-0401)
This publication has 66 references indexed in Scilit:
- Microbial community assembly, theory and rare functionsFrontiers in Microbiology, 2013
- Biodiversity effects on ecosystem functioning change along environmental stress gradientsEcology Letters, 2012
- Disentangling the importance of ecological niches from stochastic processes across scalesPhilosophical Transactions B, 2011
- Combined niche and neutral effects in a microbial wastewater treatment communityProceedings of the National Academy of Sciences of the United States of America, 2010
- PyNAST: a flexible tool for aligning sequences to a template alignmentBioinformatics, 2009
- FastTree: Computing Large Minimum Evolution Trees with Profiles instead of a Distance MatrixMolecular Biology and Evolution, 2009
- Sustainable and efficient biohydrogen production via electrohydrogenesisProceedings of the National Academy of Sciences of the United States of America, 2007
- Drought mediates the importance of stochastic community assemblyProceedings of the National Academy of Sciences of the United States of America, 2007
- The metacommunity concept: a framework for multi‐scale community ecologyEcology Letters, 2004
- Conservation evaluation and phylogenetic diversityBiological Conservation, 1992