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| 新疆巴音布鲁克高山草地物种丰富度与生产力的关系 | |
| 引用本文： | 安尼瓦尔·买买提,杨元合,郭兆迪,方精云,潘伯荣,胡玉昆.新疆巴音布鲁克高山草地物种丰富度与生产力的关系[J].干旱区研究,2006,23(2):289-294. |
| 作者姓名： | 安尼瓦尔·买买提 杨元合 郭兆迪 方精云 潘伯荣 胡玉昆 |
| 作者单位： | 1. 北京大学环境学院生态学系,北京大学地表过程分析与模拟教育部重点实验室,北京,10087;中国科学院,新疆生态与地理研究所,乌鲁木齐,830011 2. 北京大学环境学院生态学系,北京大学地表过程分析与模拟教育部重点实验室,北京,10087 3. 中国科学院,新疆生态与地理研究所,乌鲁木齐,830011 |
| 摘 要： | 利用野外调查的物种丰富度和生物量资料,对位于新疆天山中段巴音布鲁克草地的20个样地进行群落数量分类,揭示每种群落类型的物种丰富度和生产力特征,在此基础上,考察了群落内和群落间物种丰富度与生产力的关系,并探讨其形成机制.结果表明:利用TWINSPAN将20个样地划分为6个群落类型(亚高山草原、亚高山草甸化草原、亚高山草原化草甸、亚高山草甸、高山草甸和高山沼泽草甸).6个草地群落类型地上生物量、物种丰富度差异明显:就地上生物量而言,亚高山草原和亚高山草甸较低,高山沼泽草甸和高山草甸较高,而亚高山草甸化草原和亚高山草原化草甸处于两者之间;就物种丰富度而言,亚高山草甸和高山草甸较高,亚高山草原和高山沼泽草甸较低,而亚高山草甸化草原和亚高山草原化草甸处于两者之间.群落内物种丰富度与生产力的关系表现出多种形式:亚高山草原、亚高山草甸和高山草甸的物种丰富度与生产力呈正相关,亚高山草甸化草原的物种丰富度与生产力呈负相关,而亚高山草原化草甸和高山沼泽草甸的物种丰富度与生产力没有表现出显著的相关关系.群落间物种丰富度与生产力呈现"单峰"关系.群落内生产力范围不够大,可能是群落内未能观察到"单峰"关系的原因;环境异质性是导致群落间出现"单峰"关系的关键因素. |
| 关 键 词： | 高山草地 物种丰富度 生产力 生态尺度 巴音布鲁克 新疆 |
| 文章编号： | 1001-4675（2006）02-0289-06 |
| 收稿时间： | 2005-10-12 |
| 修稿时间： | 2005-10-122005-10-21 |
Relationship between the Species Richness and the Productivity of Alpine Steppes in Bayanbulak, Xinjiang |
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| Anwar Mohammat,YANG Yuan-he,GUO Zhao-di,FANG Jing-yun,PAN Bo-rong,HU Yu-kun.Relationship between the Species Richness and the Productivity of Alpine Steppes in Bayanbulak, Xinjiang[J].Arid Zone Research,2006,23(2):289-294. | |
| Authors: | Anwar Mohammat YANG Yuan-he GUO Zhao-di FANG Jing-yun PAN Bo-rong HU Yu-kun |
| Abstract: | A major challenge in discerning patterns of species richness and productivity is to derive the data for examining the relationships across ecological and geographical scales.In this paper,the data collected from the alpine steppes in Bayanbuluk,Xinjiang,are used to examine how the relationship between species richness and productivity differs when the ecological scale is changed.We clustered 20 plots into six community types by TWINSPAN analysis.The relationship between species richness and productivity is quantified at two ecological scales,i.e.within communities and across communities,on which its formation mechanism is researched.The results show that the 20 plots can be divided into 6 types,i.e.,the subalpine steppe,subalpine meadow steppe,subalpine steppe meadow,subalpine meadow,alpine meadow and alpine swamp meadow.The differences of the aboveground biomass and species richness between the 6 alpine steppe communities are significant: the biomass of the subalpine steppe and subalpine meadow is low,that of alpine swamp meadow and alpine meadow is high,and that of subalpine meadow steppe and subalpine steppe meadow is moderate;the species richness of the subalpine meadow and alpine meadow is high,that of subalpine steppe and alpine swamp meadow is low,and that of the subalpine meadow steppe and subalpine steppe meadow is moderate.It is found that there are various relationships between the species richness and the productivity within the communities,that is the positive or negative correlation or there is no significant correlation between them.When the extent of analysis is expanded to all the communities(across the communities),a significant unimodal relationship between the species richness and the biomass is found.It is considered that the environmental heterogeneity is a key factor in the development of the unimodal relationship between the species richness and the productivity. |
| Keywords: | Bayanbuluk Xinjiang alpine steppe species richness productivity ecological scale |
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