| 张莹,蔡京勇,汪洋,佘远国.锐齿槲栎群落乔灌草层优势种的种间关联研究[J].林业调查规划,2026,51(1):130-139 |
| 锐齿槲栎群落乔灌草层优势种的种间关联研究 |
| Interspecific Associations of Dominant Plant Populations in Tree-Shrub-Grass Layer of Quercus aliena var. acutiserrata Community |
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| DOI： |
| 中文关键词: 种间关联 生态种组 锐齿槲栎群落 方差比率(VR) χ2检验 Spearman 秩相关检验 |
| 英文关键词: interspecific association ecological species group Quercus aliena var. acuteserrata community variance ratio χ2
test Spearman rank correlation test |
| 基金项目:湖北省林业科技支撑重点项目(2020LYKJ03);中德财政合作林业重大研究项目(zdczhz2021ky09). |
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| 中文摘要: |
| 基于样地调查数据,采用方差比率(VR)、 χ2检验、Spearman 秩相关检验方法,研究堵河源国
家级自然保护区锐齿槲栎群落乔木层、灌木层和草本层共67 个优势种群、721 个种对间的种间关联,应用主成分分析(PCA)划分各层次植物的生态种组。方差分析表明,群落各层优势物种间整体呈显著正关联(P<0.05),具有较高稳定性;χ2检验表明,乔木层、灌木层和草本层种对正负关联比
为1.71、1.16和 1.44,各层呈不显著关联种对数均在 90%以上,乔灌草层种对间关联松散,物种呈独立分布;Spearman 秩相关检验显示,乔木层、灌木层和草本层种对正负关联比为1.24、1.19和
1.31,各层正相关种对数均多于负相关种对数,呈不显著相关种对数均在 80%以上,种对间独立性较高,乔木层优势树种锐齿槲栎幼苗数量多,幼树极少,幼苗阶段的种间竞争是锐齿槲栎更新的主要限制因素;根据PCA 排序,将乔木层、灌木层和草本层均划分为4 个生态种组。 锐齿槲栎群落整体稳定性较强,乔木层稳定性最高;多数种对呈不显著相关,物种独立分布,稳定共存;锐齿槲栎自然更新困难,应结合锐齿槲栎的喜光特性适当开辟林窗促进其更新。 |
| 英文摘要: |
| Based on field survey data, variance ratio (VR), χ2
test, and Spearman rank correlation were
employed to study the interspecific associations of 67 dominant species and 721 species pairs across the
tree, shrub, and herbaceous layers in the Quercus aliena var. acuteserrata community of Duheyuan National Nature Reserve. Principal component analysis (PCA) was used to classify the ecological species
groups in each layer. Variance analysis indicated a significant positive correlation overall among the dominant species in each layer (P<0.05), reflecting high community stability. The χ2
test showed that theratio of positive to negative associations between species pairs in the tree, shrub, and herbaceous layers
was 1.71, 1.16, and 1.44, respectively. More than 90% of species pairs in each layer exhibited no significant association, with loose species associations and independent distribution across layers. The Spearman
rank correlation test demonstrated that the ratio of positive to negative associations between species pairs in
the tree, shrub, and herbaceous layers was 1.24, 1.19, and 1.31, respectively, with more positive than
negative species pairs in each layer, and over 80% of species pairs showed no significant correlation, indicating a high degree of independence. Seedlings of the dominant tree species Q. aliena var. acuteserrata
were abundant, but saplings were rare, suggesting that interspecific competition at the seedling stage was
the main limiting factor for the regeneration of Q. aliena var. acuteserrata. According to the PCA ordination, the tree, shrub, and herbaceous layers were each divided into four ecological species groups. The
Q. aliena var. acuteserrata community exhibited overall strong stability, with the tree layer being the most
stable. Most species pairs were not significantly correlated, and species were independently distributed,
coexisting stably. Natural regeneration of Q. aliena var. acuteserrata was challenging, and based on its
light-demanding characteristics, opening forest gaps was recommended to promote its regeneration. |
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