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<p>Different grazing management practices significantly influence the sustainability of wetland ecosystems. This study aimed to investigate the effects of grazing and enclosure disturbances on the vertical structure of soil bacterial communities across various microhabitats. We assessed the distribution of soil bacteria along vertical profiles (0–100&#xa0;cm soil depth) in two distinct habitats—hummocks and hollows—within the Xilin riparian wetland in China, utilizing 16&#xa0;S rRNA analysis. The results revealed that bacterial α-diversity in both hummocks and hollows increased with soil depth under grazing disturbance. Grazing disturbance reduced the vertical spatial variation of bacterial communities in the two microhabitats, particularly in the hollows. There were significant differences in bacterial community structure between hummock and hollow in grazing areas, suggesting that grazing activities may enhance the influence of habitat characteristics on bacterial community structure. Redundancy analysis (RDA) showed that soil pH, Fe, and Mn were major factors affecting the bacterial community structure in the grazing. Collectively, these results indicated that grazing disturbance altered the vertical structure of soil bacteria in wetlands, with varying effects observed between the two habitats. These results highlighted that the significance of grazing in shaping the vertical spatial dynamics of bacterial communities in microhabitats and provide a theoretical foundation for the ecological restoration and sustainable development of riparian wetland microhabitats.</p>

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Grazing and Enclosure Alter the Vertical Distribution of Bacterial Communities in Different Microhabitats of Wetlands Along the Xilin River

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Xiaoai Cao,
  • Yating Tian,
  • Huamin Liu,
  • Hongbo Yu,
  • Feng Niu,
  • Rui Zhang,
  • Zhichao Xu,
  • Yi Zhuo,
  • Lu Wen,
  • Dongwei Liu,
  • Lixin Wang

摘要

Different grazing management practices significantly influence the sustainability of wetland ecosystems. This study aimed to investigate the effects of grazing and enclosure disturbances on the vertical structure of soil bacterial communities across various microhabitats. We assessed the distribution of soil bacteria along vertical profiles (0–100 cm soil depth) in two distinct habitats—hummocks and hollows—within the Xilin riparian wetland in China, utilizing 16 S rRNA analysis. The results revealed that bacterial α-diversity in both hummocks and hollows increased with soil depth under grazing disturbance. Grazing disturbance reduced the vertical spatial variation of bacterial communities in the two microhabitats, particularly in the hollows. There were significant differences in bacterial community structure between hummock and hollow in grazing areas, suggesting that grazing activities may enhance the influence of habitat characteristics on bacterial community structure. Redundancy analysis (RDA) showed that soil pH, Fe, and Mn were major factors affecting the bacterial community structure in the grazing. Collectively, these results indicated that grazing disturbance altered the vertical structure of soil bacteria in wetlands, with varying effects observed between the two habitats. These results highlighted that the significance of grazing in shaping the vertical spatial dynamics of bacterial communities in microhabitats and provide a theoretical foundation for the ecological restoration and sustainable development of riparian wetland microhabitats.