百山祖中山中亚热带常绿阔叶林群落5年动态特征  

A 5-year mid-mountain subtropical evergreen broadleaved forest study in Baishanzu, east China

作　　者：陈小荣 陈圆圆[2] 骆争荣[3] 丁炳扬[2] 

机构地区：[1]浙江凤阳山一百山祖国家级自然保护区百山祖管理处,浙江庆元323800 [2]温州大学生命与环境科学学院,浙江温州325035 [3]丽水学院生态学院,浙江丽水323000

出　　处：《浙江农林大学学报》2013年第6期821-829,共9页Journal of Zhejiang A&F University

基　　金：中国科学院专项基金资助项目(SW04103);浙江省生态环境保护专项基金(浙财建字[2003]17号);中国国家R&D基础设施和设备发展计划项目(2008BAC39B02)

摘　　要：为了解分布在中国东部中山地带典型的中亚热带常绿阔叶林的短期群落动态,于2003年和2008年,对面积为5 hm2的百山祖森林动态样地进行2次全面调查,分析群落内主要树种的补员和死亡情况。结果表明:①从2003年到2008年,该样地内胸径≥1 cm的植物共有2 343株死亡,占样地内个体总数的7.79%,分属于96个物种,占物种总数62.75%。5 a间,新增加的胸径≥1 cm的木本植物中共有1 131株,占样地内个体总数的3.93%。有补员个体的物种共计65种,占物种总数的36.72%。②百山祖5 hm2样地,胸径≥1 cm的所有个体的年死亡率为1.45%,年补员率为0.62%。灌木的年平均死亡率超过2.00%,高于其他生活型功能群,而4个生活型功能群的年平均补员率差异不大。③样地内主要树种胸径≥1 cm的个体5 a内的年平均死亡率为1.55%,年平均补员率为0.78%。30个主要树种的死亡率、补员率以及适合度差异较大,死亡率和补员率跟物种多度之间并没有相关性。这些结果显示:百山祖中山中亚热带常绿阔叶林群落近期出现了一定的更新困难,但物种组成基本稳定;种群动态存在较大的种间差异,且与生活型和多度的关系不显著。Population dynamics of primary forest species are important for a stable community structure and function. To explore mortalities, recruitments, fitness and changes of population size of the primary forest species in a mid-mountain, subtropical evergreen broadteaved forest in a short term, how do these parameters differ with species life form, and finally the community dynamics of the forest, a 5 hm2 plot （250 mx200 m） was established in 2002 on the north slope of Baishanzu Peak in Fengyangshan-Baishanzu National Nature Re- serve, east China. In 2003, all 30 092 woody plants alive ~ith a DBH （diameter at breast height）I〉 1 cm were tagged, mapped, measured, and identified by species. In 2008, all these woody plants were mea- sured, their living states were examined, and other individuals reached 1 cm DBH during the 5-year term were tagged, mapped, measured, and identified by species. Based on two datasets from censuses in 2003 and 2008, living, dead and recruited plants were grouped into canopy, mid-story, understory tree and shrub （4 functional groups）, and analyzed to estimate annual mortality, recruitment rates and fitness of 30 tree species, and the species composition dynamics of the community were determined with non-metric muhidi-mensional scaling （NMS）. Results showed that （1） compared to plants living in 2003, over five years a total of 2 343 stems （7.79%） belonging to 96 species had died, and 1 131 stems （3.93%） comprising 65 species （36.72%） reached 1 cm DBH. （2） Of all species in the plot, the average annual mortality rate was 1.45%, and the average annual recruitment rate was 0.62%. The annual mortality rates of 4 functional groups were 1.19%, 1.95%, 1.30%, and 2.59% respectively, while the annual recruitment rates of them were 0.67%, 0.92%, 0.68% and 0.92%. （3）For the 30 major species, the average annual mortality was 1.55%, the average annual recruitment rate was 0.78%, and the annual mortality as well as the recruitment rate and fitness, which were all unre

关 键 词：森林生态学 常绿阔叶林 死亡率 补员率 生活型 适合度 物种组成 

分 类 号：S718.4[农业科学—林学]