Nutrient enrichment drives the sediment microbial communities in Chinese mitten crab Eriocheir sinensis culture

Bingchan Jia, Yifan Li, Xinyuan Zi, Xiaohong Gu, Hezhong Yuan, Erik Jeppesen, Qingfei Zeng*

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

Microbial communities play a critical role in aquaculture ecosystems. To identify the influence of sediment nutrient levels on microbial communities, sediment and water samples were collected from Chinese mitten crab Eriocheir sinensis culture ponds with different nutrient enrichment levels. Relevant physicochemical properties were measured, and 16 S rRNA gene sequencing was applied to identify relevant bacterial communities in the sediments. The results showed that the diversity and composition of microbial communities in sediments with different levels of nutrient enrichment varied considerably. Proteobacteria was the most abundant phylum in all samples, followed by Bacteroidetes, and Desulfobacterota with relative abundances of 23.5–40.9%, 9.8–21.5%, and 9.6–18.1%, respectively. Notably, total nitrogen (TN), organic matter (OM), and pH were important factors driving sediment bacterial community aggregation, the TN concentration explaining 61.5% of the microbial community variation. This study highlights that long-term culture activities alter the degree of sediment nutrient enrichment, which in turn affects microbial community composition and may ultimately have an impact on culture efficiency.

Original languageEnglish
Article number115281
JournalEnvironmental Research
Volume223
ISSN0013-9351
DOIs
Publication statusPublished - Apr 2023

Keywords

  • Aquaculture
  • Eriocheir sinensis
  • Microbial community
  • Sediment

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