Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China.
Ying Yong Sheng Tai Xue Bao. 2024 Jul 18;35(7):1779-1788. doi: 10.13287/j.1001-9332.202407.007.
In order to provide a guide for plant selection of ecological restoration at antimony (Sb) mining ecological damaged sites, species composition, importance value, niche, and interspecific associations of tree, shrub, and herb layers were examined at Sb mining site in Nandan City, Guangxi, China. The results showed that 23 vascular plant species were recorded at the Sb mining ecological damaged site, belonging to 22 genera and 13 families, primarily Gramineae, Cyperaceae, Fabaceae, and Asteraceae. The highest importance values for trees, shrubs, and herbs were observed in (56.7%), (56.3%), and (44.0%), which were characterized by fairly large niche widths of 1.58, 1.32 and 1.57, respectively. The highest niche overlap values were found between and in the tree layer, and between and in the herb layer, with the value of 0.68 and 0.99, respectively. Shrub layer exhibited a lower range of niche overlap (0.30-0.42), suggesting significant niche differentiation among different species. In the tree and shrub layers, most species showed insignificantly negative associations, the proportion was 83.3% and 66.7%, respectively, indicating that the plant community was not stable. Herb layer generally exhibited significantly positive correlations, with 52.4% of species pairs showing positive correlation, indicating weak resource competition among species. Overall, plant community at Sb mining ecological damaged site was unstable. In the process of ecological restoration, trees and shrubs that can adapt to the conditions and have positive associations should be prioritized in species selection, such as , , , and . This will promote vegetation positive succession, rehabilitate the ecosystem and ensure sustainable development at Sb mining ecological damaged sites.
为了为锑（Sb）矿开采生态破坏区的植物选择提供生态恢复指南，对中国广西南丹市 Sb 矿开采生态破坏区的乔木、灌木和草本植物层的物种组成、重要值、生态位和种间关联进行了研究。结果表明，在 Sb 矿开采生态破坏区记录了 23 种维管植物，隶属于 22 属 13 科，主要为禾本科、莎草科、豆科和菊科。乔木、灌木和草本植物的最高重要值分别为 （56.7%）、 （56.3%）和 （44.0%），其生态位宽度分别为 1.58、1.32 和 1.57，相对较大。在乔木层中， 与 之间以及在草本层中， 与 之间的生态位重叠值最高，分别为 0.68 和 0.99。灌木层的生态位重叠范围较低（0.30-0.42），表明不同物种之间存在明显的生态位分化。在乔木和灌木层中，大多数物种之间表现出不显著的负关联，比例分别为 83.3%和 66.7%，表明植物群落不稳定。草本层通常表现出显著的正相关，有 52.4%的种对表现出正相关，表明物种之间的资源竞争较弱。总体而言，Sb 矿开采生态破坏区的植物群落不稳定。在生态恢复过程中，应优先选择能够适应条件并具有正关联的乔木和灌木，如 、 、 、 等，这将促进植被的正向演替，恢复生态系统，确保 Sb 矿开采生态破坏区的可持续发展。
