中文摘要：

通过样地调查,利用多样性和复杂性指数分别研究了佛坪国家自然保护区植物群落物种多样性、复杂性沿海拔的变化规律,并对比分析了复杂性与物种多样性之间的关系。结果表明：（1）随着海拔升高,群落结构总复杂性与物种多样性表现出相似的变化规律,均呈现出＂低-高-低＂的偏正态分布格局,且海拔1 300～1 500m是植物群落总复杂性和多样性最大区域;植物群落无序结构复杂性与总复杂性沿海拔变化规律相似,而群落有序结构复杂性却没有随海拔升高呈规律性变化。（2）研究区域植物群落物种多样性不仅与海拔变化有关,还与巴山木竹（Bashania fargesii）、秦岭箭竹（Fargesia qinlingensis）分布密度有着密切关系;在2个竹林交汇区域,物种多样性及物种数量都有着明显升高。（3）群落总复杂性、无序结构复杂性分别与多样性各个指数具有极显著的线性关系,物种多样的变化能够完全表达植物群落总复杂性的变化,但植物群落有序结构复杂性与物种多样性之间无显著相关性。因此,物种多样性不能用作植物群落结构复杂性测度方法。

英文摘要：

The plant communities in Foping Natural Reserve were explored in this study.The diversity index and Huffman coding were used to examine the diversity and complexity of plant communities,as well as the relationship between complexity and species diversity.The results showed that：（1）The species diversity and complexity of plant communities presented a ＂low-high-low＂ pattern of skewed normal distribution as the altitude increased.The largest region of total complexity and diversity of plant community was concentrated from 1 300 to 1 500 m.The change pattern of total complexity and disorder complexity with altitude was similar to species diversity of communities（＂low-high-low＂ pattern）.However,the structure complexity had no regularity while the altitude increased.（2）Plant species diversity in the natural reserve was not only related with the altitude change,but also had close relationship with density of Bashania fargesii and Fargesia qinlingensis.The species diversity and species number significantly increased in the intersection of two bamboo groves.（3）The total complexity and disorder complexity of plant community had significant linear relations with the each index of species diversity,respectively.The variation of species diversity can totally express the changes of plant community complexity but can not be used to measure the structure complexity,because there is no significant correlation between species diversity and structure complexity.