摘要
克隆构型、分株种群可塑性特征以及植物的分布格局都是克隆植物适应环境的表现形式,也是克隆植物生态学的重要研究内容。本文通过野外调查和对比分析,研究不同光照下东方草莓克隆构型、分株种群特征以及点分布格局。结果表明:东方草莓的克隆构型随光照发生相应的变化,低光照下其匍匐茎节间长和分枝角度均增大而分枝强度减小;随光照减弱,东方草莓分株种群的生物量、根冠比和分株种群密度显著降低;不同光照下东方草莓分株均以随机分布为主但不同尺度下有所差异,其分布格局强度依次为旷地<林缘<林下。通过分析克隆植物在不同光照的资源利用对策和适合度,阐述了东方草莓的克隆构型、分株种群可塑性特征以及其分布格局随光资源可利用性变化的进化和生态适应意义。
Clonal architecture,ramet population characteristics and spatial pattern are the embodiment of clonal plants' adaptation to the environment as well as the important research contents of clonal plants ecology. By field observation and comparison analysis,this paper explores the clonal architecture,the plasticity characteristics of ramet population and the spatial point pattern of Fragaria Orientalis Lozinsk under different light intensity. The results show that clonal architecture changes with light availability. Under lower light,its intensity internode-lengths and branch angels of stolons are larger while its branch intensities are smaller. Its biomass of ramet population,rootshoot ratio and density of ramet population decrease significantly with the reduction of light intensity. Under different light intensities,the spatial pattern of ramets is mainly randomly distributed but differs at different scales. Its pattern intensity goes as: open space < forest edge < understory. Through the analysis of its resources utilization and fitness under different light intensity,the clonal architecture,the plasticity characteristics of ramet population and the evolution and adaptation significance of its spatial pattern changing with resources availability are discussed.
出处
《西华师范大学学报（自然科学版）》
2017年第3期234-240,共7页
Journal of China West Normal University(Natural Sciences)
基金
教育部留学回国人员科研启动基金([2015]1098)
西华师范大学基本科研业务费资金(416399)
关键词
克隆植物
分布格局
点格局分析
克隆种群
东方草莓
clonal plants
spatial pattern
point pattern analysis
clonally population
Fragaria orientalis
