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气候,而不是牧场,通过植被变化和非生物因素对欧亚草原地理模式的变化影响土壤微生物多样性
Bademu Qiqige1,2, Bin Wei1,2, Yuqi Wei1,2
1Department of Grassland Science, College of Grassland Science & Technology, China Agricultural University, Beijing, China.
Frontiers in plant science
|September 25, 2023
概括
气候因素显著影响草原生物多样性和土壤微生物. 牲畜的放牧强度比细菌更影响真菌,气候在微生物社区结构中起着关键作用.
科学领域:
- 生态生态学 生态生态学
- 微生物学 微生物学
- 环境科学 环境科学
背景情况:
- 畜牧放牧影响草原的生物多样性,主要由气候调解.
- 土壤微生物对生物地球化学循环至关重要,但牧场与气候对微生物群落的联合影响尚不清楚.
研究的目的:
- 研究放牧强度和气候因素 (平均年温度和降水) 对草原土壤微生物群落的结合作用.
- 分析这些因素如何影响植被和土壤的物理化学特性.
主要方法:
- 沿着自然温度和降水梯度研究了四个草原,并结合了不同的放牧强度.
- 收集和分析了植被,土壤生化特性和土壤微生物群落 (细菌和真菌) 数据.
- 采用零碎结构方程建模 (SEM) 来确定微生物多样性的关键驱动因素.
主要成果:
- 气候因素改变了土壤细菌和真菌的β多样性.
- 放牧强度及其与气候的相互作用主要影响了真菌β多样性.
- 气候因素和放牧强度影响了植被和土壤特性;它们的相互作用影响了EC和MBC.
- 气候因素解释了13.1%的细菌社区变异;放牧强度解释了3.01%的真菌社区变异.
- 年平均温度和降水量是细菌β多样性的关键预测因素,受土壤碳和的影响.
- 年平均降水量是真菌β多样性的关键因素,主要受土壤的影响.
结论:
- 细菌和真菌的β多样性对不同的环境过程做出反应.
- 土壤微生物群体随着时间的推移表现出适应特定放牧强度的适应能力.
- 气候因素是土壤细菌多样性的主要驱动因素,而降水则是牧草草地真菌多样性的关键.
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