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恢复后的时间变化,土壤种子库和地表植被之间的关系在一个回收的露天煤矿

Yiming Liu^1,2, Le Qi^1,2, Weibo Ren^3,4

¹Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China.

Scientific reports

|July 21, 2025

概括

恢复的草原显示了土壤种子库和地表植被的显著变化,采矿后17年. 植被转向自然草原,多年生植物增加,入侵植物减少,有助于生态恢复.

科学领域:

生态恢复生态恢复
牧场生态牧场生态
土壤科学土壤科学

背景情况:

土壤种子库 (SSB) 和地面植被群体 (AVC) 对于生态恢复至关重要.
了解SSB和AVC的时间动态有助于修复策略.
露天煤矿倾倒场面面临着独特的恢复挑战.

研究的目的:

调查SSB和AVC在矿山倾倒现场恢复的草原上的继承情况.
确定SSB和AVC在时间恢复后的变化.
为采矿场的长期康复提供建议.

主要方法:

非度量多维缩放 (NMDS) 用于社区分析.
相关性分析用于评估土壤特性,SSB和AVC之间的关系.
结构方程建模 (SEM) 探索因果关系.

主要成果:

SSB密度在475.00705.00植物/m2之间,AVC密度在94192.8植物/m2之间.
在恢复17年后,SSB和AVC发生了显著的转变.
植被转向自然草原,多年生物种增加,年/两年生减少.
在17年后,格拉米内亚和树脂类的密度与自然草原相匹配.
侵袭性的 *Salsola collina* 存在随着时间的推移而减少.
土壤特性和SSB之间的关系较弱,但与AVC.强.
随着时间的推移,SSB和植物群落的相似性下降了.

结论:

矿场恢复的草原接近自然状态 17年后恢复.
SSB和AVC的顺序轨迹受到时间和恢复实践的影响.
长期监测和适应性管理对于成功的矿山土地恢复至关重要.

关键词:

生物多样性生物多样性开放式煤矿的废弃物是煤矿的废弃物相似之处相似之处土壤种子银行土壤种子银行植物社区的植被群体

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