南京灵谷寺栓皮栎种群结构与动态  

The population structure and dynamics of Quercus variadilis in Nanjing Spirit Valley

作　　者：袁在翔 金雪梅[1,2] 马婷瑶 陈斌[1,2] 关庆伟[1,2] 王玲[1,2] 

机构地区：[1]南方现代林业协同创新中心,南京210037 [2]南京林业大学生物与环境学院,南京210037

出　　处：《生态学杂志》2017年第6期1488-1494,共7页Chinese Journal of Ecology

基　　金：土壤保育型(江苏区域)城镇景观林培育与管理技术体系研究与示范课题(2015BAD07B06-6);江苏省高校优势学科建设工程项目(PAPD)资助

摘　　要：为了明晰南京灵谷寺栓皮栎种群动态特征,通过落叶阔叶混交林中栓皮栎种群样地调查,编制了种群静态生命表,并绘制其存活曲线和生存分析函数曲线,运用时间序列模型对种群的数量动态进行预测。结果表明:(1)在当前演替阶段,栓皮栎种群属于增长型,数量变化动态指数V_(pi)与V'_(pi)均大于0,存活曲线介于Deevey-Ⅰ型和Deevey-Ⅱ型之间,结合种群各龄级的统计分析及次生演替规律,说明栓皮栎种群正在由增长期向稳定期过渡,且时间序列预测表明过渡时期较长。另外,种群结构波动表明,经过强烈的环境筛选后,种群抵抗力增强,生命期望值短期内增加,死亡密度下降,种群数量稳定性提升。(2)在落叶阔叶混交林70多年的次生演替过程中,栓皮栎种群数量动态呈现出波动性变化特征,总体上趋于稳定,但幼苗幼树呈下降趋势。在今后的森林经营过程中,应人为促进栓皮栎幼苗幼树生长,保证其存活率,进而维持种群的增长与稳定,为灵谷寺落叶阔叶林可持续发展提供有利条件。To evaluate the population dynamics of Quercus variabilis in Nanjing Spirit Valley, this study established a static life table, depicted survival curves and function curves, and made predictions with a time-sequence model, based on a field investigation of Q. variabilis population in a deciduous broad-leaved forest plot. The results showed that （ 1 ） the population was in the stage of expending with dynamic indices （ Vpi and V,pi〉0）. The survival curve displayed an intermedi- ate pattern between Deevey-I and Deevey-II types. Together with the results from age-class analy- sis and the patterns of secondary succession, it was suggested that the Q. variabilis population was in a transition between expending stage and stable stage. However, the time-sequence model indicated that the period of the transition would be long. Additionally, the fluctuation of population structure showed that, driven by strong environmental filtering, the population resistance, life ex- pectancy and population stability increased while death density decreased with time. （2） Through 70 years of secondary succession in this deciduous broad-leaved forest, the population of Q. vari- abilis showed a fluctuation dynamic, which generally trended to be stable but with a decreasing trend in seedling and sapling frequency. Thus, in terms of forest management, promoting the growth of Q. variabilis seedlings and saplings and ensuring their survival rate can maintain the growth and stability of the Q. variabilis population for the sustainable development of the decidu- ous broad-leaved forest in Nanjing Spirit Valley.

关 键 词：栓皮栎 种群结构 种群动态 群落演替 静态生命表 

分 类 号：S718.5[农业科学—林学]