历史的土地利用对森林土壤中的微生物社区聚集过程具有长期影响
Ernest D Osburn1, Frank O Aylward2, J E Barrett2
1Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA. eosburn@vt.edu.
ISME communications
|November 8, 2023
概括
历史的土地利用影响了土壤微生物群落. 被干扰的土壤有利于选择,而不受干扰的土壤则依赖于分散和漂移以进行社区聚集,不同影响细菌和真菌.
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:
- 土地使用变化显著改变了土壤微生物社区结构.
- 了解特定的社区集会过程对于预测生态系统反应至关重要.
- 历史的土地管理实践可能对土壤生物有持久的影响.
研究的目的:
- 研究历史土地利用对土壤微生物社区聚集过程的影响.
- 区分选择,分散和漂移在构建细菌和真菌群落中的作用.
- 为了确定微生物社区在土地干扰后聚集的环境驱动因素.
主要方法:
- 在森林流域中采集土壤样本,这些流域具有多样化的历史土地管理 (不受干扰,伐木,农业).
- 扩展序列测序用于表征细菌和真菌群体.
- 无效建模用于量化选择,分散和漂移的相对重要性.
主要成果:
- 细菌群体是通过选择和中性过程 (分散和漂移) 构成的.
- 菌群体主要是通过中性过程构成的.
- 在历史上受到干扰的土壤中,选择更为占主导地位,而在未受到干扰的土壤中,分散更为重要.
- 植物和土壤含量的变化被确定为选择的关键驱动因素.
结论:
- 历史的土地利用通过不同的生态过程影响了微生物社区的聚集.
- 干扰将平衡转向选择驱动的组装,而不受干扰的条件有利于中性过程.
- 识别植物和土壤等驱动因素是了解对土壤微生物生态的长期影响的关键.
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