Ministry of Education Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University/Guangxi Key Laboratory of Sustainable Utilization of Landscape Resources in Lijiang River Basin, Guilin 541004, Guangxi, China.
College of Environment and Resources, Guangxi Normal University, Guilin 541004, Guangxi, China.
Ying Yong Sheng Tai Xue Bao. 2023 Jul;34(7):1771-1778. doi: 10.13287/j.1001-9332.202307.006.
To understand the interspecific relationships of tree species in the karst forest of Junzi Mountain in Eas-tern Yunnan, we evaluated the niche and interspecific association of dominant tree species based on field survey plot data with the combining approaches of niche determination, test, association coefficient (AC), and Spearman rank correlation test. The results showed that the niche breadth of was the largest and that of was the smallest. The ranking of niche breadth was more consistent with the ranking of frequency than with that of importance values. The degree of niche overlap was generally low, with a mean value of 0.21, suggesting a low similarity in resource utilization among tree species. The overall association of dominant tree species was significantly positive, and the ratio of positive and negative association was 1.07, indicating that the communities were at a relatively stable and the late succession stage. The test and Spearman rank correlation test for tree dominant species showed that 65.3% species pairs were not significantly associated with each other, indicating a weak interspecific association. Both association coefficient (AC) and Spearman rank correlation coefficient showed significantly positive correlations with the corresponding niche overlap index. The species pairs of , , , had strong interspecific associations and wide ecological niches, thus may have potential application value in ecological restoration of karst region in eastern Yunnan and the vicinity areas.
为了了解滇东南君子山喀斯特森林树种的种间关系，我们基于野外样地调查数据，运用生态位确定、检验、关联系数（AC）和Spearman 秩相关检验相结合的方法，评价了优势树种的生态位和种间关联。结果表明，的生态位宽度最大，的生态位宽度最小。生态位宽度的排序与频度的排序比与重要值的排序更一致。种间生态位重叠程度普遍较低，平均值为 0.21，表明树种在资源利用上的相似度较低。优势树种的总体关联呈显著正相关，正、负关联的比值为 1.07，表明群落处于相对稳定和演替后期。对优势树种进行的检验和 Spearman 秩相关检验表明，65.3%的种对之间没有显著关联，表明种间关联较弱。关联系数（AC）和 Spearman 秩相关系数均与相应的生态位重叠指数呈显著正相关。种对、、、具有较强的种间关联和较宽的生态位，因此在滇东南及周边喀斯特地区的生态恢复中可能具有潜在的应用价值。
