摘要
种间关系能够反映植物群落的结构和功能、演替的类型和阶段以及群落的稳定程度,对保护生物多样性和促进植被恢复具有重要意义。为探明鹫峰国家森林公园低效人工林林下主要物种的种间关系,以样地中出现频度较高的植物为研究对象,在2×2联列表的基础上,通过χ2检验、种间联结系数AC和Spearman秩相关系数检验进行种间联结性分析。研究结果表明:灌木层在χ2检验中表现为显著(P<0.05)和极显著(P<0.01)的种对共有11个,在Spearman秩相关系数检验中共有23个;草木层在χ2检验中表现为显著(P<0.05)和极显著(P<0.01)的种对共有15个,在Spearman秩相关系数检验中共有27个;灌草两层大多数种对联结程度不显著。灌木层正关联种对数与负关联基本持平,草本层正负种对关联比接近1∶2;灌草两层皆处在动态变化之中。林下植被种间关系是上层乔木影响、群落演替进程、物种生态习性以及群落环境条件等因素共同作用的结果。根据PCA排序可把灌草两层主要植物分别划分为4个生态种组。
Interspecific relationship can reflect the structure and function of plant community, the type and stage of succession and the degree of community stability. It is of great significance for biodiversity conservation and vegetation restoration. In order to clarify the interspecific relationship of understory species in Jiufeng National Forest Park during restoration period, the experiment was conducted based on the 2 × 2 table to analyze the interspecific associations among the main species with high frequency byx2-test, association coefficient（AC） and Spearman＇ s rank correlation coefficient test. In shrub layer, 11 species pairs showed significant （ P 〈 0. 05 ） or highly significant（P 〈 0. 01 ） association in x2-test, while 23 species pairs in Spearman＇ s rank correlation coefficient test. In herb layer, 15 species pairs showed significant（ P 〈 O. 05 ） or highly significant （P 〈 0. O1 ） association in X2-test, while 27 species pairs in Spearman＇ s rank correlation coefficient test. For majority of the species pairs in two layers, their interspecific association did not reach significant level. In shrub layer, there was roughly an equal amount of the species pairs with positive association and those with negative association. In herb layer, the ratio of species pairs having positive association to those having negative association approximately was 1：2. The species compositions of the two layers were fluctuating. The understory species interactions resulted from many factors including the effects of upper tree, the community succession process, species ecological characteristics and environmental conditions. By principal components analysis, the main species in herb layer and shrub layer were divided into four ecological species groups separately.
出处
《植物研究》
CAS
CSCD
北大核心
2016年第1期34-42,共9页
Bulletin of Botanical Research
基金
林业公益性行业科研专项"建设工程损毁林地植被修复关键技术研究与示范"(200904030)
关键词
低效人工林
植被恢复
种间联结
联结系数
生态种组
low-efficiency plantation
vegetation restoration
interspecific association
association coefficient
ecological species group
