Insights into Feast-Famine polyhydroxyalkanoate (PHA)-producer selection : Microbial community succession, relationships with system function and underlying driving forces

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Long Huang
  • Zhiqiang Chen
  • Qinxue Wen
  • Lizhi Zhao
  • Lian Yang
  • Yao Wang

Detail(s)

Original languageEnglish
Pages (from-to)167-176
Journal / PublicationWater Research
Volume131
Publication statusPublished - 15 Mar 2018
Externally publishedYes

Abstract

The Feast-Famine (FF) process has been frequently used to select polyhydroxyalkanoate (PHA)-accumulating mixed cultures (MCs), but there has been little insight into the ecophysiology of the microbial community during the selection process. In three FF systems with well-defined conditions, synchronized variations in higher-order properties of MCs and complicate microbial community succession mainly including enrichment and elimination of non-top competitors and unexpected turnover of top competitors, were observed. Quantification of PHA-accumulating function genes (phaC) revealed that the top competitors maintained the PHA synthesis by playing consecutive roles when the highly dynamic turnover occurred. Due to its specific physiological characteristics during the PHA-accumulating process, Thauera strain OTU 7 was found to be responsible for the fluctuating SVI, which threatened the robustness of the FF system. This trait was also responsible for its later competitive exclusion by the other PHA-producer, Paracoccus strain OTU 1. Deterministic processes dominated the entire FF system, resulting in the inevitable microbial community succession in the acclimation phase and maintenance of the stable PHA-accumulating function in the maturation phase. However, neutral processes, likely caused by predation from bacterial phages, also occurred, which led to the unpredictable temporal dynamics of the top competitors.

Research Area(s)

  • Driving force, Feast-Famine (FF), Microbial community succession, Mixed culture (MC), Polyhydroxyalkanoate (PHA), Turnover

Bibliographic Note

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Citation Format(s)

Insights into Feast-Famine polyhydroxyalkanoate (PHA)-producer selection: Microbial community succession, relationships with system function and underlying driving forces. / Huang, Long; Chen, Zhiqiang; Wen, Qinxue et al.
In: Water Research, Vol. 131, 15.03.2018, p. 167-176.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review