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植物研究  2015 

百山祖常绿阔叶林种子雨组成及特点

DOI: 10.7525/j.issn.1673-5102.2015.01.014, PP. 84-91

Keywords: 百山祖,种子雨密度,繁殖策略,优势种,物种共存

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Abstract:

?为了解百山祖常绿阔叶林种子雨组成及其在时间上的动态变化,以百山祖自然保护区5hm2永久样地为研究对象,设置50个种子雨收集器,定期收集2009~2012年间木本植物凋落物中的繁殖器官,鉴定到种并计数。四年间共收集到47个物种的果实或种子,隶属于16科30属,其中种子10132粒,果实13627个,成熟果实占41.33%。6个群落优势物种的成熟果实量占该物种总结实量的比例较低,显示出r-选择者的特点。优势种在样地内的重要值与其种子雨密度并不存在明显的相关性(P>0.05),体现了种子雨和后续生活史阶段格局的不一致。优势种的种子雨凋落高峰时间相对分散,有利于缓解种间竞争。除木荷和多脉青冈外,其余优势种种子雨密度均存在明显的年际变化。

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