千年桐人工林灌木层物种种间联结、生态位与空间分布格局  

Interspecific Connection,Ecological Niche and Spatial Distribution Pattern in Shrub Layer of Vernicia montana Plantation

作　　者：邓慧华 DENG Huihua(Fujian Soil and Water Conservation Experimental Station,Fuzhou 350003,China)

机构地区：[1]福建省水土保持试验站,福建福州350003

出　　处：《北华大学学报(自然科学版)》2025年第3期372-380,共9页Journal of Beihua University(Natural Science)

基　　金：福建省水利科技项目(MSK202209)。

摘　　要：种间关系为群落结构形成的关键因子,与种群生态位及其空间分布格局密切关联。从生态位和分布格局的角度分析种群之间的关联,可揭示群落中各种群的地位及其分布状况,对于认识群落结构特征及其稳定发展具有重要意义。为明确丘陵山地红壤侵蚀区林下灌木层的种间关系、生态位特征及其空间分布,从物种多样性、生态位指数、空间分布格局等多角度分析千年桐人工林灌木层物种特征。结果表明:灌木层物种多样性指数较高,主要植物种类共18种,隶属12科17属,其中,小叶赤楠在灌木层中的优势度最高。灌木层物种重要值与生态位呈极显著正相关(P<0.001),多数种对间存在生态位重叠。灌木层总体关联性为不显著正联结,种对联结中多数种对呈不显著相关,物种间处于相对独立状态。灌木层物种多数呈集群分布状态,其中,杉木的聚集程度最高。总体而言,研究区千年桐人工林灌木层物种独立性较高,种间关联度低,致使目前总体稳定性稍弱。但由于灌木层物种多样性较高且总体关联性为不显著正联结,千年桐人工林灌木层呈现逐渐稳定发展的趋势。The interspecific relationship is a key factor of community structure formation,closely related to the population niche and its spatial distribution pattern.The analysis of correlation between populations based on ecological niche and spatial distribution pattern can reveal the population status and distribution in the community,which is vital to examine community structure characteristics and stable development.In order to clarify the interspecific relationship,ecological niche characteristics and spatial distribution of shrub layer in hilly terrain of red soil erosion region,species characteristics in shrub layer of Vernicia montana plantation were investigated from the perspectives of species diversity,ecological niche indexes and spatial distribution pattern.The results showed that the species diversity index of shrub layer was high,with a total of 18 species belonging to 12 families and 17 genera,among which Syzygium buxifolium had the highest advantage.The significant positive correlation was observed between importance value of shrub species and ecological niche(P<0.001)and there was ecological niche overlap between most species pairs.The overall association of the shrub layer was positive instead of significant,with most of the species pairs insignificantly correlated,and the species were in a relatively independent state.Most of the shrub species were clustered,and Cunninghamia lanceolata had the highest aggregation degree.In general,the shrub species of Vernicia montana plantation in the study area are highly independent,but the low degree of interspecific association makes the overall stability of the current shrub layer slightly weaker.However,the species diversity of the shrub layer is high and the overall correlation is insignificantly positive.Therefore,the shrub layer of the Vernicia montana plantation tends to develop steadily.

关 键 词：千年桐 生态位 种间联结 物种多样性 空间分布格局 

分 类 号：S718.5[农业科学—林学]