摘要
为了解华北落叶松人工林物种多样性随林分年龄的变化规律,对燕山北部地区不同年龄华北落叶松人工林的生物多样性进行调查和分析。研究结果表明:3种林龄的落叶松人工林在物种丰富度指数、Shannon-Wiener指数以及均匀度Pielou指数都以9 a生华北落叶松人工林为最高,其次为33 a生华北落叶松人工林,而18 a生华北落叶松人工林最低;林隙林隙地段物种多样性明显高于非林隙。随林分年龄的变化,华北落叶松人工林物种多样性没有表现出明显的规律性,与林分年龄相比,林分郁闭度以及林隙的数量对物种多样性的影响更大。
In order to understand how the herb biodiversity changes with the ages of Larix principis-rupprechtii plantation,the herb biodiversity of Larix principis-rupprechtii plantations with different ages were investigated in the north region of Yanshan mountain.The results showed that the indices of richness,Shannon-weiner and evenness of pielou,the plantations were in the same order：the 9 years of plantationsthe 33 years of plantationsthe 18 years of plantations.Moreover,The species diversity in the forest gap was higher than that in other place.It is concluded that there was not significant relations between herb species diversity and the ages of the plantation,and compared with the ages, the forest canopy closure and the forest gap affected the herb species diversity more strongly.
出处
《河北林果研究》
2011年第1期9-12,共4页
Hebei Journal of Forestry and Orchard Research
基金
国家"十一五"科技支撑项目(2006BAD03A11)
关键词
落叶松人工林
物种多样性
丰富度
均匀度
Larix principis-rupprechtii plantation
species diversity
richness
evenness
