人类干扰对土壤微生物网络结构和稳定性的影响比干旱生态系统中的自然干扰更大
Kenji Maurice1, Amélia Bourceret2, Sami Youssef3
1LSTM, Univ Montpellier, CIRAD, INRAE, IRD, SupAgro, UMR082 LSTM, 34398 Montpellier Cedex 5, France.
The Science of the total environment
|November 1, 2023
概括
土壤微生物群落适应长期的洪水-干旱周期,表现出比面临更短,更强烈干扰的群体更大的稳定性. 这种适应会影响生态系统的功能和保护战略.
科学领域:
- 土壤生态学 土壤生态学
- 微生物生态学 微生物生态学
- 环境科学 环境科学
背景情况:
- 气候变化和农业破坏土壤微生物群落的稳定,影响生态系统功能.
- 了解微生物耐药性和适应干扰对于保护至关重要.
- 在干扰后微生物相互作用的恢复延迟仍然不太清楚.
研究的目的:
- 研究细菌和真菌社区网络对土壤干扰的反应.
- 为了比较微生物社区在人类 (农业) 与自然 (蒸发盆地) 洪水-干旱相继下的弹性.
- 评估土壤微生物组对水力限制的长期适应.
主要方法:
- 在不同的干扰模式下检查了Haloxylon salicornicum的根球微生物社区网络.
- 在人为和自然干扰之间比较网络拓,模块化,稳定性和α多样性.
- 分析了社区组成的差异,以应对历史和年度洪水-干旱的继承.
主要成果:
- 与过去的农业有关的人类干扰导致微生物网络的模块化和稳定性降低.
- 自然干扰 (蒸发盆地) 显示了与自然环境相比的网络稳定性,尽管α多样性较低.
- 社区的组成在各个地点之间有很大的差异,这表明对干扰历史的反应不同.
结论:
- 土壤微生物群落表现出对干扰的时间反应,长期适应增强了稳定性.
- 过去的农业用途在土壤微生物组网络结构和弹性上留下了持久的遗产.
- 自然的洪水-干旱周期促进了微生物群体的稳定性,突出了扰乱制度历史的重要性.
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