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Spatial heterogeneity determines the gastrointestinal microbiome signatures and ecological processes that govern bacterial community assembly in sheep

文献类型： 外文期刊

作者： Zhang, Yukun 1 ; Cheng, Jiangbo 1 ; Lin, Changchun 5 ; Li, Fadi 1 ; Zhang, Xiaoxue 6 ; Li, Chong 6 ; Zhang, Deyin 1 ; Yang, Xiaobin 1 ; Xu, Dan 1 ; Zhao, Yuan 1 ; Zhao, Liming 1 ; Li, Xiaolong 1 ; Tian, Huibin 1 ; Weng, Xiuxiu 1 ; Wang, Weimin 1 ;

作者机构： 1.Lanzhou Univ, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou, Peoples R China

2.Lanzhou Univ, Key Lab Grassland Livestock Ind Innovat, Minist Agr & Rural Affairs, Lanzhou, Peoples R China

3.Lanzhou Univ, Engn Res Ctr Grassland Ind, Minist Educ, Lanzhou, Peoples R China

4.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou, Peoples R China

5.Xinjiang Acad Anim Sci, Inst Anim Sci, Urumqi, Peoples R China

6.Gansu Agr Univ, Coll Anim Sci & Technol, Lanzhou, Peoples R China

关键词： sheep; gastrointestinal tract; co-occurrence networks; enterotypes; bacterial community assembly

期刊名称：MICROBIOLOGY SPECTRUM （ 影响因子：3.8； 五年影响因子：4.1 ）

ISSN：

年卷期： 2025 年 13 卷 2 期

页码：

收录情况： SCI

摘要： Sheep are one of the globally significant livestock, providing meat, dairy products, and wool for human life, playing an indispensable role in human civiliza tion. Despite significant advancements in microbiome research in recent years, most studies have focused solely on the rumen, lacking a comprehensive study covering the microbiome of different gastrointestinal tract (GIT) regions in sheep. In this study, we collected 338 samples from 10 different regions of the sheep GIT and systematically investigated their microbiome signatures, including community structure, enterotypes, interactions among taxa, and microbial community assembly. Our results showed that the bacterial diversity of sheep GIT exhibited a U-shaped pattern along the GIT, with the lowest diversity in the jejunum. The bacterial community composition and enterotype varied along the GIT, mainly divided into three distinct groups (four-chambered stomach, small intestine, and large intestine). The rumen had the highest total number of bacterial taxa, unique taxa, and unique functions, while the enterotypes were the same in the three regions of the large intestine. The bacterial co-occurrence networks differed greatly between different GIT regions, with more positive correlations than negative ones. Furthermore, we found that the assembly processes of bacterial communities in the four-chambered stomach and small intestine were mainly stochastic, while those in the large intestine were mainly shaped by deterministic processes, with a higher ecological niche width than other GIT regions. Our results reveal the spatial pattern of bacterial communities in the sheep GIT and the intrinsic mechanisms of bacterial community assembly, laying the foundation for microbial interventions to improve sheep productiv ity and sustainable farming.

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