在二级森林中,水而不是的可用性主要调节土壤微生物β多样性和共发生网络
Jiayin Feng1, Huixia Ma1, Chunyu Wang2
1School of Life Sciences/Hebei Basic Science Center for Biotic Interaction, Institute of Life Science and Green Development, Hebei University, Baoding 071002, PR China.
The Science of the total environment
|October 23, 2023
概括
大气中的沉积并没有影响土壤微生物多样性,但改变了网络的复杂性. 降水减少,而不是增加,显著影响了微生物群落,突出显示了水的可用性.
科学领域:
- 生态生态学 生态生态学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 陆地生态系统受到大气 (N) 沉积和降水模式变化的重大影响.
- 这些全球变化因素对土壤微生物群落多样性和组合 (细菌,真菌,原生体) 的具体影响尚不清楚.
研究的目的:
- 调查添加和改变降水模式 (增加和减少) 对土壤微生物群落的影响.
- 了解微生物群落多样性和在不断变化的环境条件下聚集的驱动因素.
主要方法:
- 一个为期六年的实地实验是在二级森林中进行的.
- 处理包括添加,增加降水量和减少降水量.
- 分析了土壤微生物群落 (细菌,真菌,原生体) 的α和β多样性,网络复杂性和稳定性.
主要成果:
- 添加气并没有影响微生物的α或β多样性,但减少了微生物网络的复杂性.
- 降水变化没有影响微生物的α-多样性.
- 降水量减少,与降水量增加不同,增加了细菌和原生体社区的不相似性 (β-多样性),主要是由于减少水的可用性导致的物种替代.
- 降水量减少也削弱了微生物的复杂性和稳定性,增加了共发生网络中原生体的比例.
结论:
- 土壤微生物的β-多样性对降水增加和减少表现出不对称的反应.
- 在塑造土壤微生物β-多样性方面,水的可用性,特别是干旱条件,比更为关键的因素.
- 全球变化可能会增加土壤原生体的生态重要性,从而重组森林微生物群落.
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