摘要
以塞罕坝地区主要森林类型为研究对象,运用α多样性指数和β多样性指数对其林下灌木层和草本层生物多样性进行研究。结果表明,各林分类型草本层丰富度指数均大于灌木层丰富度指数。在多样性方面,灌木层的Simpson指数和Shannon-Wiener多样性指数最大的林分分别为樟子松林、山杨林,最小的是华北落叶松;草本层Simpson指数和Shannon-Wiener多样性指数最大的林分分别为华北落叶松林、白桦林,最小的为山杨林。在均匀度上,灌木层Jsw和Jsi均匀度指数最大的林分均为樟子松,华北落叶松林最小。草本层均匀度指数Jsw最大为樟子松林,Jsi最大的为华北落叶松林,白桦和山杨都相对较小。对β多样性的研究则表明各林分类型之间灌木层和草本层的相异系数都较大,不同林分之间共有种较少。
This article takes the main forest type in Saihanba area as the research object, and researches the shrub layer and herbal layer biodiversity of understory vegetation using a di- versity index and diversity index. Results indicate that the richness index of herbal layer is greater than that of the shrubs layer among all forest stand types. In the shrub layer, the largest Simpson and Shannon-Wiener diversity indexes appear in the stands of Pinus sylves- tris var. mongolica Litv. and Populus davidiana with the smallest diversity index in Larix principis-rupprechtii, while in the herbal layer, the stand with the largest Simpson and Shannon-Wiener diversity index are Larix principis-rupprechtii, and Betula platyphylla, with Populus davidiana the smallest. In terms of uniformity indexes of Jsw and Jsi, the shrub layer shows the stand of Pinus sylvestris var. mongolica Litv. is the largest but Larix principis-rupprechtii the smallest. However, the maximum Jsw and Jsi indexes appear in the herbal layer of Pinus sylvestris var. mongolica Litv. and, Larix principis-rupprechtii, respectively while there exist unobvious Jsw and Jsi differences in Betula platyphylla and Populus davidiana . The research on ~ diversity shows that there exist larger dissimilaritycoefficients between the shrub layer and the herbal layer among different forest stand types with relatively fewer common species.
出处
《河北林果研究》
2012年第1期10-13,共4页
Hebei Journal of Forestry and Orchard Research
关键词
塞罕坝
森林类型
林下植被
生物多样性
Saihanba
forest types
understory vegetation
biodiversity
