土壤微生物生物质的不同反应,多样性和对土地利用强度的相互作用在领土范围内
A Christel1, N Chemidlin Prevost-Bouré2, S Dequiedt2
1Agroécologie, Institut Agro, INRAE, Univ. Bourgogne Franche-Comté, 21000 Dijon, France; AgroParisTech, 75732 Paris, France.
The Science of the total environment
|October 2, 2023
概括
土地利用的强化大大减少了71%的土壤微生物生物量和95%的网络复杂性. 土壤有机碳和农业实践对土壤微生物群落产生重大影响.
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:
- 土地利用密集化对领土范围内的土壤微生物群落的影响未得到充分记录.
- 了解这些影响对于验证当地和全球生态发现至关重要.
- 需要整合环境条件和农业系统的领土差异.
研究的目的:
- 研究各种土地利用和土壤管理实践对土壤微生物生物质和多样性的影响.
- 分析这些影响在法国勃第的3300平方公里的领土.
- 评估微生物参数对土地使用强度的脆弱性.
主要方法:
- 对土壤分子微生物生物质的量化和从300个土壤样本中对土壤DNA的高通量测序.
- 地质统计学用于绘制宏观生态模式的应用.
- 差异分区分析以确定物理化学特征,土地用途和实践的影响.
主要成果:
- 微生物生物质和多样性的地理模式不同,由不同的环境因素驱动.
- 土壤微生物生物量从自然生态系统减少到农业生态系统减少了约71%,主要受到土壤有机碳的影响.
- 细菌丰富性最好通过土壤质地来预测,而真菌丰富性则通过pH来预测. 菌类丰富性比细菌丰富性更受影响.
- 同时发生的网络分析显示,随着土地利用的强化,微生物社区相互作用的复杂性下降了95%.
- 特定的农业实践,如土壤耕作和作物保护,对微生物参数的影响不同.
结论:
- 土地利用的强化大大减少了土壤微生物生物质和微生物相互作用的复杂性.
- 微生物多样性比生物质对强化不那么敏感,真菌群体受到的影响更大.
- 土壤的物理化学性质和农业管理实践是土壤微生物社区结构和区域范围内的功能的主要驱动因素.
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