百山祖常绿阔叶林厚叶红淡比的萌蘖繁殖特性  

Sprouting propagation characteristics of Cleyera pachyphylla in the Baishanzu subtropical evergreen forest

作　　者：骆争荣[1] 陈德良 杨辉[1,3] 苏立蕾 丁炳扬[4] 

机构地区：[1]丽水学院生态学院,丽水323000 [2]浙江凤阳山-百山祖国家级自然保护区百山祖管理处,庆元323800 [3]浙江农林大学林业与生物技术学院,临安311300 [4]温州大学生命与环境科学学院,温州325035

出　　处：《生态学报》2015年第16期5385-5392,共8页Acta Ecologica Sinica

基　　金：中国科学院专项基金资助项目(SW04103);中国国家R&D基础设施和设备发展计划项目(2008BAC39B02);丽水学院人才启动资金(QD12350)

摘　　要：克隆植物在群落更新和物种多样性的维持中起着重要的作用。目前克隆生态学很少涉及自然条件下乔木的研究。通过调查百山祖5 hm2的动态监测样地中随机选取的298株厚叶红淡比母株及其产生的萌蘖情况,分析它的克隆形态可塑性、径级结构及其影响因素,以及萌蘖对母株存活的影响。结果表明:母株间所带萌蘖数量差别较大,与母株的胸径正相关;82.79%的萌蘖在距母株30 cm以内;单棵母株所发萌蘖的数量和母株—萌蘖距离在四类生境间都无显著差异,但位于母株东侧的萌蘖显著多于母株西侧的;克隆群体与整个种群的径级结构存在差异,幼苗和幼树在克隆群体所占比例高于其在整个种群中所占的比例;而母株短期存活率与其所发萌蘖数量无关。厚叶红淡比在常绿阔叶林下的克隆繁殖显示出了独特的适应性,对维持群落的稳定具有重要意义。Sprouting extends the regeneration niche in forests. By sprouting, clonal plants play an important role in recovery of vegetation after disturbance. Many common species that make up a significant part of species diversity in forests have the potential for clonal growth or reproduction. Clonal reproduction contributes to the maintenance of species diversity, especially in clonal plant communities. Current understanding about clonal plants comes from studies of clonal herbs or shrub species in grassplot or gardens, and knowledge about clonal tree species in natural forest community is limited. Our aim is to explore the influence of habitat heterogeneity on the phenotypic plasticity of Cleyera pachyphyUa, a main clonal tree species in evergreen forests, and its advantages and disadvantages in terms of life history. A 5-hm^2（250 m x 200 m） forest dynamic plot （FDP） of Baishanzu was established in July 2003, where all trees with dbh （diameter at 1.3 m breast height）≥ 1 cm and seedlings （with true leaves and dbh ≤ 1 cm） of tree species were tagged, mapped, measured （dbh for trees and diameter at ground for seedlings）, and identified to a given species. In 2008 and 2013, all the woody plants aliveduring the previous investigation were measured, their living states were examined, and other individuals that reached 1 cm dbh during the previous 5-years were tagged, mapped, measured, and identified. In August 2011, we investigated sprouting propagation characteristics of 298 randomly selected genets of C. pachyphylla in the 5 hm2 Baishanzu forest dynamic plot （FDP）. For each genet, data of the number of sproutings, dbh, or ground diameter （when dbh 〈 1 cm） of each sprouting, and distance and direction from each sprouting to its parent ramet were collected. The habitat of each genet was classified into one of the four habitat types （Gully, Steep slope, Mild slope, and Ridge）. The data show that the amount of sprouting per genet differs among the 298 clones of C. pachyphylla. Most sprouti

关 键 词：密集型 密度制约 母株存活率 乔木 向光性 

分 类 号：S718.4[农业科学—林学]