2024年5月27日 星期一
福建龟山伞花木所在群落乔灌层优势种的种间联结性
Interspecific associations of dominant species in arbor and shrub layers of Eurycorymbus cavaleriei located community in Guishan Mountain of Fujian Province
2022年 第31卷 第6期 页码[63-72]    下载全文[1MB]  
摘要

为探明福建省明溪县龟山伞花木〔Eurycorymbus cavaleriei (Lévl.) Rehd. et Hand.-Mazz.〕所在群落主要树种的种间关系,采用χ2检验、联结系数、共同出现百分率和点相关系数,对乔木层和灌木层优势种(重要值大于等于2.0%)的种间联结性进行研究。结果表明:该群落乔木层和灌木层的方差比率分别为0.72和1.33,统计量分别为14.36和33.30,说明该群落乔木层和灌木层优势种的总体种间联结性分别为不显著负联结和不显著正联结。χ2检验结果表明:乔木层优势种组成的45个种对的χ2值均小于3.841,种间联结性不显著,正、负联结种对数的比值为0.8∶1.0;在灌木层优势种组成的78个种对中,76个种对的联结性不显著,正、负联结种对数的比值为1.2∶1.0。乔木层和灌木层优势种的联结系数、共同出现百分率和点相关系数分析结果与χ2检验结果相似,多数种对的联结性不显著,伞花木与大部分优势种的联结性不显著。从联结系数看,伞花木在乔木层与木樨〔Osmanthus fragrans (Thunb.) Lour.〕和山牡荆〔Vitex quinata (Lour.) Will.〕呈显著负联结;其在灌木层与紫麻〔Oreocnide frutescens (Thunb.) Miq.〕和络石〔Trachelospermum jasminoides (Lindl.) Lem.〕呈显著正联结,与小蜡(Ligustrum sinense Lour.)呈显著负联结。从共同出现百分率看,伞花木仅在灌木层与紫麻呈显著正联结。综上所述,福建龟山伞花木所在群落优势种的种间联结性较低,因此,该群落亟待就地保护,积极实施人工辅助措施。

Abstract

To clarify the interspecific relationships of main tree species of Eurycorymbus cavaleriei (Lévl.) Rehd. et Hand.-Mazz. located community in Guishan Mountain of Mingxi County of Fujian Province, the interspecific associations of dominant species (importance value equal to or greater than 2.0%) in arbor and shrub layers were studied by using χ2 test, association coefficient, percentage of common occurrence, and point correlation coefficient. The results show that the variance ratios of arbor and shrub layers in this community are 0.72 and 1.33, respectively, and the statistical magnitude are 14.36 and 33.30, respectively, indicating that the overall interspecific associations of dominant species in arbor and shrub layers of this community are non-significant negative association and non-significant positive association, respectively. The χ2 test result shows that the χ2 values of 45 species pairs composed of dominant species in arbor layer are all smaller than 3.841, their interspecific associations are not significant, and the ratio of positively and negatively associated species pair numbers is 0.8∶1.0; among 78 species pairs composed of dominant species in shrub layer, the associations of 76 species pairs are not significant, and the ratio of positively and negatively associated species pair numbers is 1.2∶1.0. The results of association coefficient, percentage of common occurrence, and point correlation coefficient of dominant species in arbor and shrub layers are similar to the χ2 test result, the associations of most species pairs are not significant, and the associations between E. cavaleriei and most dominant species are not significant. In terms of association coefficient, E. cavaleriei shows significant negative associations with Osmanthus fragrans (Thunb.) Lour. and Vitex quinata (Lour.) Will. in arbor layer, and shows significant positive associations with Oreocnide frutescens (Thunb.) Miq. and Trachelospermum jasminoides (Lindl.) Lem. and a significant negative association with Ligustrum sinense Lour. in shrub layer. In terms of percentage of common occurrence, E. cavaleriei only shows a significant positive association with O. frutescens in shrub layer. Taken together, the interspecific associations of dominant species in E. cavaleriei located community in Guishan Mountain of Fujian Province are relatively low, so the community is urgent to conserve in situ and actively carry out artificial assistance measures.

关键词伞花木; 乔木层; 灌木层; 优势种; 种间联结性
Key wordsEurycorymbus cavaleriei (Lévl.) Rehd. et Hand.-Mazz.; arbor layer; shrub layer; dominant species; interspecific association
作者罗敏贤1a,1b,1c, 林碧华1a,1b,1c, 陈绪辉1a,1b,1c, 肖丽芳1a,1b,1c, 潘标志2, 叶宝鉴3, 刘宝1a, 郑世群1a,1b,1c
所在单位1. 福建农林大学: a. 林学院, b. 海峡自然保护区研究中心, c. 生态与资源统计福建省高校重点实验室, 福建 福州 350002;2. 福建省林业调查规划院, 福建 福州 350003; 3. 福建工程学院建筑与城乡规划学院, 福建 福州 350118
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基金项目福建省林业科技项目(2021FKJ17)