干旱区生态环境知识资源中心(Arid): 高寒沙区植被人工修复与种子植物物种多样性的变化

Arid

	高寒沙区植被人工修复与种子植物物种多样性的变化
其他题名	Changes of Plant Species Diversity in the Process of Human-Induced Vegetation Restoration in Sandy Lands of Qinghai-Tibet Plateau
	杨洪晓 1; 卢琦2 ; 吴波 2; 罗天祥 3; 杨恒华 4
来源期刊	林业科学
ISSN	1001-7488
出版年	2004
卷号	40 期号:5 页码:45-49
中文摘要	以1958年以来青海省沙珠玉治沙站流沙治理实验为基础,研究了高寒沙区植被人工修复过程中种子植物物种多样性变化的规律.结果表明:人工治理初期沙地植物群落的物种丰富度、Shannon_Wiener指数和Pielou均匀度指数不断增大,并逐渐达到最大值;但是随着恢复的继续进行,赖草会逐渐占据优势,上述三项指数降低.设置人工沙障后削弱了沙丘表面风沙活动对植物定居的不良影响,促进植物物种顺利定居并启动植被的恢复重建.
英文摘要	Sand control and human-induced vegetation restoration is very important to improve local environments and achieve sustainable development in Qinghai-Tibet Plateau. Since 1958, a series of experiments to combat desertification have been conducted in Shazhuyu of Gonghe Basin, Qinghai Province. In this study, several indices of plant species diversity, increased rapidly after establishing sand barriers. At the earlier phase of artificial sand fixation vegetation, all these indices reached a maximum, and then decreased because of the overwhelming dominance of Leymus secliuntus population in late succession. It indicated that on shifting sand dunes of Qinghai-Tibet Plateau, persistent erosion and sand drifting caused by strong winds are probably the limiting factor or bottleneck for plant species to survive shifting sand dunes. When mechanical and biological sand barriers are established, wind erosion and sand drifting can be weakened dramatically, which created relatively favorable conditions for native plant species to survive there and then accelerated the vegetation restoration. Total cover and cover of Leymus secliumus which is dominant in best-restored vegetaion are the most sound indices to evaluate degree of vegetation restoration, instead of plant species diversity which rose at the beginning of restoration but decreased reversely after a short time and dropped to bottom in bestrestored vegetation. According to intermediate disturbance hypothesis, we argue that the low species diversity maybe results from the overwhelming dominance of Leymus secalimus that can exclude some other plant species.
中文关键词	高寒沙区 ; 沙障 ; 人工固沙植被 ; 植被重建 ; 物种多样性
英文关键词	Alpine sandy land Sand barriers Artificial sand fixation vegetation Human-induced vegetation restoration Species diversity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:1691050
来源机构	中国科学院地理科学与资源研究所 ; 北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205243
作者单位	1.北京师范大学生命科学学院, 北京 100875, 中国; 2.中国林业科学院中国防治荒漠化研发中心, 北京 100091, 中国; 3.中国科学院地理科学与资源研究所, 北京 100101, 中国; 4.青海省沙珠玉治沙试验站, 共和, 813005
推荐引用方式 GB/T 7714	杨洪晓,卢琦,吴波,等. 高寒沙区植被人工修复与种子植物物种多样性的变化[J]. 中国科学院地理科学与资源研究所, 北京师范大学,2004,40(5):45-49.
APA	杨洪晓,卢琦,吴波,罗天祥,&杨恒华.(2004).高寒沙区植被人工修复与种子植物物种多样性的变化.林业科学,40(5),45-49.
MLA	杨洪晓,et al."高寒沙区植被人工修复与种子植物物种多样性的变化".林业科学 40.5(2004):45-49.