摘要
根据2×2联列表,运用方差分析、χ2统计量度量、Ochiai指数系列技术,测定福建省长汀县桂花次生林群落14个主要树种间的总体联结关系、种对间联结显著性和关联系数,并首次引入混交度,阐述种间关联性与种间空间隔离程度之间的关系.结果表明,桂花次生林群落14个主要树种的总体种间关联性呈无关联,反映该群落处于演替的初期阶段;14个主要树种的种间联结关系中,7对具显著正关联性,2对具极显著正关联性,4对具显著负关联性,2对具极显著负关联性.91个种对中,有76个种对未达到显著水平,种对间的相互独立性较强.根据群落特征,以混交度贡献率为辅助指标,探讨呈显著关系的种对与混交度贡献率的关系,得出具生态位重迭性且呈显著正关联的种对表现出高混交度贡献率,具生态相似性且呈显著正关联的种对为避免竞争表现出较低混交度贡献率,呈显著负关联的种对表现出低混交度贡献率,混交度贡献率可为判别种间关联性提供一定的参考作用.
A series of techniques, including the analysisof variance＇, χ^2-test and Ochiai＇s coefficient were used and calculated based upon a 2 × 2 contingency table to determine the overall association, the statistical significance, the coefficient of the each species-pair association and mixing of the 14 major species in Osmanthus fragrans secondary community in Changting County, Fujian, China. Furthermore, The mixing was used for the first time to analyze the relation between interspecific association and the spatial isolation of species in the O. fragrans secondary community. The results showed that the overall association of thel4 major species in the community showed no correlation, which suggested that the community was at early succession stage. The χ^2-test showed that among the 14 species, 2 species pairs exhibited highly significant positive association （SPA）, another 7 species pairs exhibited SPA, 2 species pairs exhibited highly significant negative association （ SNA）, and 4 species pairs exhibited SPA. Hence, most of the total 91 species pairs did not show significant association, which may be related to the early succession stage of the community. In addition, with the analyses of mixing contribution and community characters, the relation between species pairs with significant association and mixing contribution was discussed, which showed that overlapped-niche species pairs with SPA might have high mixing contribution, similar-niche species pairs with SPA might have relatively low mixing contribution to reduce competition, and species pairs with SNA might have low mixing contribution. So the mixing contribution could help determine interspecific association of the major species. Tab 2, Ref 17
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2007年第3期327-332,共6页
Chinese Journal of Applied and Environmental Biology
基金
福建省教育厅科研基金(K02047)
中国博士后科研基金
福建省科技厅重大基金(2001F007)资助项目~~
关键词
桂花次生林群落
种间关联
混交度
Osmanthus fragrans secondary community
interspecific association
mixing
