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负密度制约和生境过滤对古田山幼苗系统发育多样性时间变化的影响
Authors
张金屯
朱大海
+4 more
王薇
米湘成
陈声文
饶米德
Publication date
1 January 2014
Publisher
Abstract
负密度制约和生境过滤是解释森林群落物种共存和生物多样性维持机制的重要假说.已有大量研究表明,负密度制约通过优势物种的种内竞争及近缘种之间的种间竞争、个体间病菌传播等过程为非优势物种及非亲缘种提供生存空间,从而使局域群落的系统发育?多样性随时间的推移而增加;由于生境过滤的作用,特定的生境选择亲缘关系相近的物种,因而随着时间的推移,同一生境内群落间的系统发育?多样性会降低.前人的研究主要集中于利用负密度制约和生境过滤来解释物种多样性的空间变化格局,而利用这2个机制来解释在时间序列上群落系统发育多样性格局变化的研究还很少.本文以浙江古田山24 hm2亚热带常绿阔叶林永久性样地中的幼苗(胸
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Last time updated on 29/04/2023