学术
摘 要:
对晋西黄土丘陵边缘土石山区不同海拔高度木本植物物种丰富度以及各群落间β多样性特征进行了分析。结果表明,木本植物总物种丰富度随海拔高度的升高呈下降趋势,乔木种在海拔较高地段丰富度较大,灌木种则是在海拔较低地段丰富度较大。群落相异性指数Cody指数和Whittaker指数多以相邻海拔群落间的指数值最小,群落间海拔差异越大指数值越大。而群落相似性指数Jaccard和Sorenson指数则表现出相反的变化规律,即随着群落间海拔差距的增大,指数值呈逐渐减小的趋势,相邻群落间的群落相似性指数值最大。[著者文摘]
文章出处:
《干旱区研究》-2007年24卷5期 -657-660页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-4675（2007）05-0657-04
Study on the β Diversity of Secondary Natural Forest Communities in an Earthy-rocky Mountainous Region in West Shanxi Province
DONG Lin-shui, ZHANG Xu-dong, ZHOU Jin-xing （ Institute of Forestry, Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China）
Abstract:
In this paper, the species richness and β diversity of arbor communities at different altitudinal gradients in an earth-rocky mountainous region in west Shanxi Province are analyzed. The results reveal that the species richness of all the ligneous plants decreases with the increase of altitude. The richness of tree species in the communities in the regions with high altitude is high, but the richness of shrub species in the communities in the regions with low altitude is high. The research results reveal that the Cody indexes and Whittaker indexes of β diversity of the neighboring plant communities are the lowest in the study area, but the higher the altitude difference between the plant communities are, the higher the index values will be. Contrarily, the similarity indexes including the Jaccard and Sorenson indexes are increased with the increase of altitude difference between the plant communities. The study results of the β diversity of plant community can provide a theoretical basis for vegetation regeneration in the Loess Plateau.[著者文摘]
Key words:
Loess Plateau ; earth-rocky mountainous region; dominant species; secondary natural forest; speciesdiversity.
基金资助:
国家自然科学基金项目（30671721）;国家林业局脆弱生态区退耕还林科技支撑项目共同资助
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