摘要
通过对鼎湖山自然保护区锥栗种子特征的分析及进行种子取食实验,研究探讨了锥栗种子特征对动物取食格局的影响。结果表明,锥栗作为鼎湖山季风常绿阔叶林中的重要建群种之一,其更新困难的主要原因就在于种子扩散前后面临巨大的取食压力。动物对种子取食偏爱同种子大小呈现出一定的相关性,随着种子尺寸增加,取食率有线性增加的趋势。但是,锥栗应对动物取食并非完全被动的,它也发展了一些特有的生活史策略。锥栗种子的颜色与环境凋落物及土壤色相似,可以减少被取食者发现的机率。更重要的是,锥栗种子带刺的总苞有良好的保护作用。具总苞的种子取食的强度,显著低于无总苞的种子(p<0.01)。
Based on the experiments of Castanopsis chinensis seed traits and seed predation in Dinghushan Biosphere Reserve, we explored the influences of seed traits on seed predation patterns. Results showed that Castanopsis chinensis seed endured a higher predation pressure in pre-dispersal and post-dispersal process. Predators showed a predation preference to definite seed size in dispersal processes. At the same time, Castanopsis chinensis also developed some life history strategies to reduce the predation.Above all, sticky involucrum significantly reduced the seed predation intensity of post-dispersal （p 〈 0.01 ） . The seed color was similar to the litter and soil, which also helped them escape some predators.
出处
《生态环境》
CSCD
北大核心
2005年第4期493-497,共5页
Ecology and Environmnet
基金
国家自然科学基金重大项目(39899370)
国家自然科学基金项目(30470306)
关键词
锥栗
种子特征
取食
扩散
Castanopsis chinensis
seed traits
seed predation
dispersal
