Vegetation composition and distribution on the northern slope of Karlik Mountain to Naomaohu basin, East Tianshan Mountains
YiBing QIAN, HaiYan ZHANG, ZhaoNing WU, ZhongChen WANG
1 Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China; 3 College of Geology and Exploration Engineering, Xinjiang University, Urumqi 830046, China
Vegetation composition and distribution on the northern slope of Karlik Mountain to Naomaohu basin, East Tianshan Mountains
YiBing QIAN, HaiYan ZHANG, ZhaoNing WU, ZhongChen WANG
1 Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China; 3 College of Geology and Exploration Engineering, Xinjiang University, Urumqi 830046, China
摘要 This paper reports the characteristics of plant flora in the region of the northern slope of Karlik Mountain to Naomaohu basin, based on field investigation of the vegetation and referring to relevant literature. The results show that the flora of the study area mainly consists of communities of single species or a limited number of species, genera and families. The flora composition is marked by the phenomenon of dominant families and genera; the temperate element occupies a dominant position, while in terms of the genera the Tethys element is an important component. Areal-types of the species are dominated by the floral element of Asian Central-part with xerophytic characteristic, and the life-forms of plants are mainly perennial and herbaceous. These characteristics reflect that the compositions of the species in this region possess both ancient and young elements. Analysis of the relationship between the species composition, plant community diversity and altitude gradient, we found that the structure of the vegetation has an obvious vertical distribution. The lower and higher altitude areas, where the climate conditions are relative inclement, are mainly occupied by the plant communities with simple structure and single dominant population, while the species richness in the mid-altitude area increases with favorable temperature and precipitation. Consequently, the species diversity and evenness indices show single-peak distribution with increasing elevation (about < 2500 m), while the dominance indices decrease in elevation from 500 m to 2500 m and increase in elevation of > 2500 m.
Abstract: This paper reports the characteristics of plant flora in the region of the northern slope of Karlik Mountain to Naomaohu basin, based on field investigation of the vegetation and referring to relevant literature. The results show that the flora of the study area mainly consists of communities of single species or a limited number of species, genera and families. The flora composition is marked by the phenomenon of dominant families and genera; the temperate element occupies a dominant position, while in terms of the genera the Tethys element is an important component. Areal-types of the species are dominated by the floral element of Asian Central-part with xerophytic characteristic, and the life-forms of plants are mainly perennial and herbaceous. These characteristics reflect that the compositions of the species in this region possess both ancient and young elements. Analysis of the relationship between the species composition, plant community diversity and altitude gradient, we found that the structure of the vegetation has an obvious vertical distribution. The lower and higher altitude areas, where the climate conditions are relative inclement, are mainly occupied by the plant communities with simple structure and single dominant population, while the species richness in the mid-altitude area increases with favorable temperature and precipitation. Consequently, the species diversity and evenness indices show single-peak distribution with increasing elevation (about < 2500 m), while the dominance indices decrease in elevation from 500 m to 2500 m and increase in elevation of > 2500 m.
基金资助: ecological protection program of glacier area in Yiwu county of Xinjiang Hami Prefecture; National Basic Research Program of China (2009CB825105)
通讯作者:
YiBing QIAN
E-mail: dt6@ms.xjb.ac.cn
引用本文:
YiBing QIAN, HaiYan ZHANG, ZhaoNing WU, ZhongChen WANG. Vegetation composition and distribution on the northern slope of Karlik Mountain to Naomaohu basin, East Tianshan Mountains[J]. 干旱区科学, 10.3724/SP.J.1227.2011.00015.
YiBing QIAN, HaiYan ZHANG, ZhaoNing WU, ZhongChen WANG. Vegetation composition and distribution on the northern slope of Karlik Mountain to Naomaohu basin, East Tianshan Mountains. Journal of Arid Land, 2011, 3(1): 15-24.
