井冈山植物群落优势种空间分布格局与种间关联  

Spatial Pattern and Interspecific Relationship of Dominant Species in Plant Community in Jinggang Mountain

作　　者：魏识广[1] 李林[1] 许睿[1] 黄忠良[2] 曹洪麟[2] 

机构地区：[1]桂林电子科技大学生命与环境科学学院,广西桂林541004 [2]中国科学院华南植物园,广州510650

出　　处：《热带亚热带植物学报》2015年第1期74-80,共7页Journal of Tropical and Subtropical Botany

基　　金：国家自然科学基金项目(31200412;31200326;31460155)资助

摘　　要：为了解井冈山植物群落优势种的生存现状,对其空间格局和种间关系进行研究,并探讨保护策略.结果表明,重要值排前4 位的优势物种,马银花（Rhododendron ovatum）、甜槠（Castanopsis eyrei）、黄丹木姜（Litsea longate）和石木姜（L. longate var.faberi）的径级结构不同,垂直空间分布也存在明显差异.在检测的大部分尺度上,马银花、黄丹木姜和石木姜呈显著聚集分布,而甜槠呈随机分布.林冠上层物种甜槠只对林冠下层物种马银花在小尺度上（〈6 m）存在正相关作用,甜槠在一定范围内为马银花的生长提供了庇护场所.大部分个体处于林冠中层的黄丹木姜和石木姜,在树冠能够接触到的范围内呈明显的竞争关系,在尺度9-13 m 呈显著负相关分布.因此,井冈山植物群落优势物种间不存在显著竞争作用,若采取合理保护措施,植物群落的多样性水平还会继续提高.In order to understand the survival situation of plant community in Jinggang Mountain, the spatialpatterns and interspecific relationship of dominant species were studied, and the protection strategy was discussed.The results showed that four dominant species with top importance value, such as Rhododendron ovatum,Castanopsis eyrei, Litsea elongate and L. elongata var. faberi, had different size structures, as well as in verticaldistribution. Based on relative neighborhood density index （Ω r） analyses, the spatial distribution of Rhododendronovatum, Litsea elongate and L. elongata var. faberi showed significantly aggregated distribution at most scales,while that of Castanopsis eyrei was random distribution. The upper canopy species Castanopsis eyrei had onlysignificant positive correlation with under canopy species Rhododendron ovatum at small scale （〈6 m）, andCastanopsis eyrei provide refuge for Rhododendron ovatum within a certain range. However, most Litsea elongateand L. elongata var. faberi individuals in the middle canopy had obvious competitive relationship, which the twospecies showed significantly negative correlation at 9–13 m scale. Therefore, there were no significant competitionamong dominant species in Jinggang Mountain communities. If taking reasonable and scientific protection, thediversity of plant community will continue to improve.

关 键 词：空间格局 种间关系 井冈山 相对邻体密度指数 

分 类 号：Q948[生物学—植物学]