在过去的53年里,积极的恢复工作推动了社区在沙漠中的继承和聚集
Qingqing Hou1, Weigang Hu1, Ying Sun1
1State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, China.
概括
使用草棋盘屏障 (SCBs) 的沙漠再生将植物和土壤微生物群落引导到自然状态. 在沙漠恢复过程中,细菌群体表现出比植物和真菌更可预测的组装.
科学领域:
- 生态生态学 生态生态学
- 恢复生态学 恢复生态学
- 土壤科学 土壤科学
背景情况:
- 荒漠化和土地退化是全球性的挑战,需要有效的恢复战略.
- 重生努力旨在打击沙漠扩张,但它们对社区集会的影响尚未完全理解.
- 草板屏障 (SCB) 结合了沙子稳定和有机物质的添加,以促进植被恢复.
研究的目的:
- 为了研究SCB如何影响植物和土壤微生物社区的继承,在格尔沙漠的53年时间序列.
- 确定治理这些社区的时间动态和组装过程 (随机与决定性).
- 了解植物微生物相互作用和土壤有机碳 (SOC) 在沙漠恢复中的作用.
主要方法:
- 对植物和土壤微生物 (细菌和真菌) 社区属性的分析,沿着53年恢复时间序列.
- 在中国的格尔沙漠中,利用SCB作为修复技术.
- 评估社区组成的变化,时间值,以及随机和决定性过程的影响.
主要成果:
- SCB的建立逐渐将植物和微生物群落转移到自然状态.
- 观察到快速社区变化的不同时间值:植物2 - 15.5年,细菌0.5 - 8.5年,真菌2 - 8.5年.
- 细菌的继承主要是由决定性过程 (植物微生物相关性,增加SOC) 驱动的,而植物和真菌的继承则涉及更多的随机过程.
结论:
- 与土壤微生物相比,植物群体对恢复的反应延迟.
- 植物微生物相互作用和 SOC 的增加对于加速沙漠生态系统的继承和弹性至关重要.
- 细菌社区的动态提供了一个比植物或真菌社区更可预测的沙漠恢复成功指标.
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