Absolute quantification and genome-centric analyses elucidate the dynamics of microbial populations in anaerobic digesters

Chunxiao Wang, Yu Yang, Yulin Wang, Dou Wang, Xiaoqing Xu, Yubo Wang, Liguan Li, Chao Yang, Tong Zhang*

*Kontaktforfatter

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

6 Citationer (Scopus)

Abstract

Anaerobic digestion (AD) relies on myriads of functions performed by complex microbial communities in customized settings, thus, a comprehensive investigation on the AD microbiome is central to the fine-tuned control. Most current AD microbiome studies are based on relative abundance, which hinders the interpretation of microbes’ dynamics and inter-sample comparisons. Here, we developed an absolute quantification (AQ) approach that integrated cellular spike-ins with metagenomic sequencing to elucidate microbial community variations and population dynamics in four anaerobic digesters. Using this method, 253 microbes were defined as decaying populations with decay rates ranging from -0.05 to -5.85 d−1, wherein, a population from Flavobacteriaceae family decayed at the highest rates of -3.87 to -5.85 d−1 in four digesters. Meanwhile, 25 microbes demonstrated the growing trend in the AD processes with growth rates ranging from 0.11 to 1.77 d−1, and genome-centric analysis assigned some of the populations to the functional niches of hydrolysis, short-chain fatty acids metabolism, and methane generation. Additionally, we observed that the specific activity of methanogens was lower in the prolonged digestion stage, and redundancy analysis revealed that the feedstock composition and the digestion duration were the two key parameters in governing the AD microbial compositions.

OriginalsprogEngelsk
Artikelnummer119049
TidsskriftWater Research
Vol/bind224
ISSN0043-1354
DOI
StatusUdgivet - 1 okt. 2022
Udgivet eksterntJa

Bibliografisk note

Publisher Copyright:
© 2022

Fingeraftryk

Dyk ned i forskningsemnerne om 'Absolute quantification and genome-centric analyses elucidate the dynamics of microbial populations in anaerobic digesters'. Sammen danner de et unikt fingeraftryk.

Citationsformater