放牧排斥对土壤特性,真菌群落结构和不同草原类型的多样性的影响
Shijie Zhou1, Yiqiang Dong1,2,3, Helong Yang1,2,3
1School of Grassland Xinjiang Agricultural University Urumqi China.
Ecology and evolution
|March 4, 2024
概括
放牧排斥对草原类型的土壤真菌的影响不同. 草地类型,而不是排除,主要影响真菌多样性,植物和土壤是关键驱动因素.
科学领域:
- 生态生态学 生态生态学
- 土壤科学 土壤科学
- 菌类学 菌类学是指菌类学.
背景情况:
- 土壤真菌对于有机物分解,营养循环和陆地生态系统中的土壤结构至关重要.
- 菌社区的聚集因土壤深度而异,并对微生物功能和植物生长产生重大影响.
- 放牧排斥是一种常见的草原恢复策略,但其对不同草原类型的真菌群落的影响尚不清楚.
研究的目的:
- 研究9年放牧禁令对土壤特性和真菌群落的长期影响.
- 为了比较三个不同的草原类型的这些影响:温带沙漠,温带草原和山草原.
- 确定影响在放牧排除下土壤真菌社区多样性的关键因素.
主要方法:
- 实地研究涉及9年的放牧排斥在温带沙漠,草原和山地草原草地.
- 在0-5厘米和5-10厘米深度对土壤物理化学性质 (SWC,SOC,KN,N:P,pH,BD,TP,C:N,C:P) 的分析.
- 使用分子技术评估土壤真菌群体的组成和多样性 (α和β多样性).
主要成果:
- 放牧排除改变了土壤特性,特别是增加了土壤水分含量 (SWC),土壤有机碳 (SOC) 和土壤表土中: (N:P) 的比例,温带沙漠的总 (TP) 和散装密度 (BD) 发生了具体变化.
- 在草原类型中,真菌群体的组成有很大的差异,在像Glomeromycota和Mucoromycota这样的群体中有显著的变化.
- 虽然α多样性保持不变,但真菌群落的β多样性显示出显著的差异,受到牧场排斥和草原类型的影响. 草原类型成为主导因素,植被和土壤是关键因素.
结论:
- 草地类型是土壤真菌社区多样性的更重要的决定因素,而不是放牧排除.
- 植被覆盖和土壤中含量是影响真菌社区结构和功能的关键因素.
- 结果为管理多样化的草原和理解草地-土壤-微生物相互作用提供了洞察力.
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