生态学杂志2012，Vol.31Issue(6)：1419-1424,6.
梵净山自然保护区珙桐天然种群生命表与生存分析
Life table and survival analysis of natural Davidia involucrata population in Fanjing Mountain Nature Reserve, Guizhou Province of Southwest China
摘要
Abstract
Based on the population life table and the theory of survival analysis, and by using the age class structure represented by DBH (diameter at breast height) class and the stage-smoothing technique, a specific life table of Davidia involucrata population in Fanjing Mountain Nature Reserve was compiled, and the mortality rate curve, killing power curve, survival rate curve, and survival function curve were analyzed, aimed to reveal the quantitative dynamics of the population. There was a fluctuation in the structure of the D. involucrata population. The survival curve of the population appeared to be of Deevey M type, and the individuals at young stage were abundant. The mortality rate curve and disappearance rate curve in the lifespan had similar variation trend, and the population had two distinct peaks of mortality, i.e. , from I to II age class and from VIC to K age class. The survival analysis showed that the population mortality rate was increasing all along, while the survival rate was decreasing all the time. After VDI age class, the mortality rate would exceed 92% , and the survival rate would decrease to below 8% , which indicated that hazard rate surpassed survival rate. The survival functional curve showed that the individual number of the population decreased rapidly in early age period, was stable in middle age period,and declined in old age period. The high mortality of seedlings and the deficiency of middle-age trees could be the main reasons leading to the D. involucrata population becoming endangered.关键词
种群生命表/存活曲线/生存分析/珙桐Key words
population life table/ survival curve/ survival analysis/ Davidia irwoliurata.分类
生物科学引用本文复制引用
吴明开,沈志君,刘海,吴沿友,何汝态,邱阳,杨妮,杨宁..梵净山自然保护区珙桐天然种群生命表与生存分析[J].生态学杂志,2012,31(6):1419-1424,6.基金项目
梵净山自然保护区管理局、贵州科学院、中国科学院昆明分院专项合作项目、中国科学院"百人计划"择优项目和贵州省科技基金项目(黔科合J字[2011]2351号)资助. （黔科合J字[2011]2351号）
