沿海湿地的土壤微生物群落和功能对长期沉积的异质反应
Mengyue Sun1, Mingcong Li1,2, Baohua Xie3,4,5
1College of Life Sciences, Shandong Agricultural University, Tai'an, China.
NPJ biofilms and microbiomes
|March 17, 2026
概括
全球沉积对土壤微生物产生影响. 不同的形式和水平影响微生物群落和功能,影响生态系统的弹性和可持续性.
科学领域:
- 环境微生物学 环境微生物学
- 土壤科学 土壤科学
- 生态系统生态学生态学
背景情况:
- 全球 (N) 沉积是气候变化的重要后果.
- 它对土壤微生物和生态功能的影响是深刻的,但研究不足,特别是在不同的N形式和水平方面.
- 对各种土壤微生物及其在不同沉积场景下的功能进行比较研究很少.
研究的目的:
- 研究不同水平 (低,中,高) 和形式 (NH4NO3,NH4Cl,KNO3) 的模拟沉积对土壤微生物群落的长期 (7年) 影响.
- 分析对 prokaryotes,真菌和Cercozoa的影响,以及元素循环和转化.
- 评估对微生物耐药性,社区结构,网络稳定性和相关生态功能的影响.
主要方法:
- 模拟的沉积实验超过7年.
- 用于微生物群体分析 (核细胞,真菌,Cercozoa) 的amplicon测序.
- 采用QMEC芯片和15N同位素追踪用于元素循环和N转换分析.
主要成果:
- 形式显著影响了Cercozoa和 prokaryote社区结构,但不是真菌社区.
- 高 (NH4+) -N沉积降低了微生物耐药性,而酸盐 (NO3−) -N增强了 prokaryote-Cercozoa 网络稳定性和社区耐药性.
- 高沉积增加了微生物多样性,但抑制了关键的碳/循环基因和转化,增加了甲 (CH4) 排放和土壤缩风险.
结论:
- 沉积显著改变了土壤微生物群落和功能,其影响因的形式和水平而异.
- 酸盐沉积可以通过改善微生物网络稳定性来增强生态系统的弹性.
- 缓解沉积对于保持土壤健康,调节生态化学循环和促进环境可持续性至关重要.
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