干旱区生态环境知识资源中心(Arid): 天山南北坡植物种-面积关系

Arid

	天山南北坡植物种-面积关系
其他题名	Study on Species-area Relationships in the Southern and Northern Slopes of the Tianshan Mountains
	乔秀娟 1; 唐志尧 1; 安尼瓦尔·买买提 2; 方精云 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2011
卷号	28 期号:1 页码:54-59
中文摘要	通过对天山南北坡25个样地的物种-面积关系的研究,结果发现:①所有样地种-面积关系斜率的平均值为0.210.02,低于全球平均水平;②草甸,草原和荒漠的种-面积关系的斜率分别为0.140.02,0.130.01和0.280.02.草甸和草原的种-面积关系斜率无显著差别,但两者显著低于荒漠的种-面积关系斜率;③天山南北坡种-面积关系斜率与水分和能量因素均存在显著相关关系,全气候模型解释率为80.42%,其中水分因子的影响最大,为负相关,解释率为69.88%;与物种丰富度对数呈显著负相关关系;④天山南北坡种-面积关系截距与能量因子,水分因子和气候稳定性因子均显著相关,全气候模型解释率为91.9%,水分影响最大,为66.22%,正相关;与物种丰富度也呈显著正相关关系.表明水分因子是影响天山南北坡植物种-面积关系的主要因子,物种丰富度也对其存在显著影响
英文摘要	Species-area relationships (SARs) were discussed in the past decades, and they were supposed to be one of the few "genuine law" in ecology. Xinjiang is located in the hinterland of the Eurasia, where there is a high radiation but a low precipitation. In this study, the patterns and mechanisms of SARs in different arid vegetation types in the Tianshan Mountains were explored by investigating sample plots. The species-area curves of steppe, meadow and desert were charted based on 26 nested sample plots, the minimum area of each nested sample plot was 0.25 m2, and the maximum one was 400 m2. All species in each sub-plot were recorded to develop SARs. The logarithmic form power curve (S = c·Az) was applied to fit SARs, and then SARs from different areas were compared with climatic variables by plotting the slope (z value) and intercept (c value) to explore the main factors affecting the patterns of SARs in Xinjiang. The power-law model was used to explain 0.90 0.01 of variance of species richness at different scales. The average value of overall slope was 0.200.02, lower than the mean of the world. The slopes of steppe and meadow were 0.130.01 and 0.140.02 respectively. There was no significant difference between the two vegetation types. However, these two figures were significantly lower than that of desert (0.280.02). The climatic variables were classified into three groups:energy, water and climatic stability. In the full climatic models, all the factors were used to explain 80.42% of z value and 91.90% of c value respectively. In all the three factors, water factor was the most important for SARs, and the R2 values of z and c were 69.88% and 66.22% respectively. However, the effects of water factor on z value and c value were quite different, and z value was decreased but c value was increased with the increase of water factor. Similarly,z value was decreased but c value was increased with the increase of species richness. The results reveal that water was the main factor affecting the species-area relationship in this area, and the species richness also played an important role
中文关键词	草甸 ; 草原 ; 荒漠 ; 生物多样性 ; 水分 ; 物种丰富度 ; 天山 ; 新疆
英文关键词	steppe meadow desert biodiversity moisture cointent species richness Tianshan Mountains Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4140957
来源机构	中国科学院新疆生态与地理研究所 ; 北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226505
作者单位	1.北京大学城市与环境学院生态学系, 地表过程分析与模拟教育部重点实验室, 北京 100871, 中国; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	乔秀娟,唐志尧,安尼瓦尔·买买提,等. 天山南北坡植物种-面积关系[J]. 中国科学院新疆生态与地理研究所, 北京大学,2011,28(1):54-59.
APA	乔秀娟,唐志尧,安尼瓦尔·买买提,&方精云.(2011).天山南北坡植物种-面积关系.干旱区研究,28(1),54-59.
MLA	乔秀娟,et al."天山南北坡植物种-面积关系".干旱区研究 28.1(2011):54-59.