长期的输入通过改变温带草原的生命历史战略来减少土壤细菌网络的复杂性
Chao Wang1, Ziyue Shi1, Aogui Li1
1State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Hulunber Grassland Ecosystem National Observation and Research Station, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China.
iMeta
|June 20, 2024
概括
增加的输入简化了土壤细菌网络,通过促进生长速度更快的微生物. 这种转变改变了微生物相互作用,有利于合作而不是竞争,并影响了细菌社区结构.
科学领域:
- 微生物生态学 微生物生态学
- 土壤科学 土壤科学
- 环境微生物学 环境微生物学
背景情况:
- (N) 沉积是影响土壤微生物群落的主要全球变化因素.
- 了解N输入如何影响微生物相互作用和社区结构对于预测生态系统反应至关重要.
研究的目的:
- 研究输入对土壤细菌和真菌群落的影响.
- 在不同的N级下分析微生物共发生网络的结构变化.
- 确定细菌特征与网络复杂性之间的关系.
主要方法:
- 沿一条输入梯度收集了土壤样本.
- 为细菌和真菌群体构建了共发生网络.
- 估计了细菌特征,包括复制基因/寡基因的比率,核糖体RNA (rrn) 复制数和关氨酸-细胞因子 (GC) 含量.
- 用零碎结构方程建模来确定监管机制.
主要成果:
- 土壤细菌网络的复杂性随着气输入的增加而减少.
- 在细菌网络中,负与正相互作用的比率转向了合作.
- 丰富有利于复制性细菌,由增加的rrn复制数和GC含量表明.
- 在丰富下,真菌网络的复杂性保持不变.
- 细菌r-/K-战略比,而不是丰富度,直接调节细菌网络的复杂性.
结论:
- 的输入改变了土壤细菌社区的结构和相互作用,有利于复制性策略.
- 细菌生命史策略的转变是推动共同发生网络复杂性变化的关键机制.
- 这些发现提供了对微生物社区对全球丰富的反应的见解.
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