研究探讨了矿山草地恢复对高寒草地植物群落和土壤性质的影响,由于观察到的草地变化之间的关系,植物群落,和土壤性质。虽然先前的研究主要集中在草地退化对植物多样性和土壤特性的影响。在区域尺度上,高寒矿区不同恢复程度的具体影响仍然知之甚少。为了解决这个知识差距,我们在祁连山高寒采矿草原上建立了五个不同恢复程度的15个采样区(0.5m×0.5m),中国。我们的目标是评估沿这些恢复梯度的植物多样性和土壤特性的变化。我们进行了全面的分析,涵盖土壤特性[土壤水分含量(SWC),可用氮气(AN),总磷(TP),硝酸盐氮(NO3-N),铵态氮(NH4-N),总氮(TN),有效磷(AP),土壤有机碳(SOC),硝酸盐氮,土壤pH值,和电导率(EC)],植物特性(高度,密度,频率,覆盖范围,和地上生物量),和植物多样性指数(辛普森,Shannon-Wiener,玛格丽特,支配地位,和均匀度指数)。我们的发现包括鉴定和收集了来自五个恢复程度的11科16属的18种植物:非常低的恢复程度(VLRD),低恢复度(LRD),中等恢复程度(MRD),高恢复度(HRD),自然草原(NGL)。值得注意的是,像Carexduriuscula这样的物种,圆形香附,和轮胎骨显示出恢复的迹象。主成分分析和皮尔逊相关分析表明,SWC,SOC,NO3-N,和AN是影响植物群落的主要环境因子。具体来说,土壤pH值和EC随着恢复水平的增加而降低,而SWC,AN,TP,NH4-N,TN,AP,SOC,和NO3-N表现出逐渐增加,并且恢复努力更大。此外,HRD植物群落与NGL相似,表明最有效的自然恢复。总之,我们的研究为植物群落特征的反应提供了有价值的见解,植物多样性,和不同环境因子恢复程度的土壤性质。它还阐明了高寒草原沿恢复梯度的植物群落特征。
The study explores the impact of mine grassland
restoration on plant communities and soil properties in alpine grasslands, a subject of significant interest due to the observed relationship between grassland changes, plant communities, and soil properties. While prior research has mainly focused on the consequences of grassland degradation on plant diversity and soil characteristics, the specific effects of varying restoration degrees in alpine mining grasslands at the regional scale remain poorly understood. To address this knowledge gap, we established 15 sampling plots (0.5m×0.5m) across five different restoration degrees within alpine mining grasslands in the Qilian Mountains,
China. Our objective was to assess the variations in plant diversity and soil properties along these restoration gradients. We conducted comprehensive analyses, encompassing soil properties [soil water content (SWC), available nitrogen (AN), total phosphorus (TP), nitrate nitrogen (NO3-N), ammonium nitrogen (NH4-N), total nitrogen (TN), available phosphorus (AP), soil organic carbon (SOC), nitrate nitrogen, soil pH, and electrical conductivity (EC)], plant characteristics (height, density, frequency, coverage, and aboveground biomass), and plant diversity indices (Simpson, Shannon-Wiener, Margalef, Dominance, and Evenness indexes). Our findings included the identification and collection of 18 plant species from 11 families and 16 genera across the five restoration degrees: Very Low
Restoration Degree (VLRD), Low
Restoration Degree (LRD), Moderate
Restoration Degree (MRD), High
Restoration Degree (HRD), and Natural Grassland (NGL). Notably, species like Carex duriuscula, Cyperus rotundus, and Polygonum viviparum showed signs of recovery. Principal component analysis and Pearson correlation analysis revealed that soil pH, SWC, SOC, NO3-N, and AN were the primary environmental factors influencing plant communities. Specifically, soil pH and EC decreased as restoration levels increased, while SWC, AN, TP, NH4-N, TN, AP, SOC, and NO3-N exhibited a gradual increase with greater
restoration efforts. Furthermore, the HRD plant community demonstrated similarities to the NGL, indicating the most effective natural recovery. In conclusion, our study provides valuable insights into the responses of plant community characteristics, plant diversity, and soil properties across varying restoration degrees to environmental factors. It also elucidates the characteristics of plant communities along recovery gradients in alpine grasslands.