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Aquaculture Environment Interactions

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AEI 13:211-224 (2021)  -  DOI: https://doi.org/10.3354/aei00395

Intestinal microbial diversity and functional analysis of Urechis unicinctus from two different habitats: pond polycultured with Penaeus japonicus and coastal zone

Yongzheng Tang1, Shuai Ma1, Yihao Liu2, Yongrui Pi1,*, Ying Liu1, Ye Zhao1

1School of Ocean, Yantai University, Yantai 264005, PR China
2Shandong Key Laboratory of Marine Ecological Restoration, Shandong Marine Source and Environment Research Institute, Yantai 264006, PR China
*Corresponding author:

ABSTRACT: Urechis unicinctus is an important commercial and ecological invertebrate that has potential applications in the study of marine invertebrate evolution and marine pharmaceutical development. Here we analyzed the intestinal microbial diversity of U. unicinctus from 2 different habitats using 16S rDNA 454 high-throughput sequencing. The dominant phyla were Proteobacteria, Bacterioidetes, Firmicutes, and Actinobacteria in gut samples of U. unicinctus, which significantly differed from those in its 2 habitats (i.e. intertidal mudflat and pond polyculture). Exceptions were Proteobacteria, Firmicutes and Bacterioidetes, which were the dominant phyla in the sediment and water samples. The top 15 genera in the gut samples did not show any significant differences between the 2 habitats. Functional analysis of the intestinal microbial community showed that metabolism, including carbohydrate and amino acid metabolism, was the most important function. Methane metabolism was one of the main components of energy metabolism. The gut microbes also played an important role in environmental and genetic information processing, cellular processes, etc. These findings provide an understanding of gut microbiome composition and diversity in U. unicinctus from 2 different habitats. Our results can inform the management of animal health in U. unicinctus farming activities and further gut microecology research.


KEY WORDS: Urechis unicinctus · Intestinal microbes · Community diversity · Functional analysis


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Cite this article as: Tang Y, Ma S, Liu Y, Pi Y, Liu Y, Zhao Y (2021) Intestinal microbial diversity and functional analysis of Urechis unicinctus from two different habitats: pond polycultured with Penaeus japonicus and coastal zone. Aquacult Environ Interact 13:211-224. https://doi.org/10.3354/aei00395

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