| 湿地-干草原生态系统植物物种多样性研究——以宁夏盐池为例 |
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| 引用本文： | 李瑞,张克斌,王百田,杨晓晖,乔锋,杨俊杰,杨莉. 湿地-干草原生态系统植物物种多样性研究——以宁夏盐池为例[J]. 北京林业大学学报, 2006, 28(5): 12-17 |
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| 作者姓名： | 李瑞 张克斌 王百田 杨晓晖 乔锋 杨俊杰 杨莉 |
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| 作者单位： | 1.1 北京林业大学林木花卉遗传育种教育部重点实验室 2 江西农业大学园林艺术学院3 河北科技师范学院生命科学系 |
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| 基金项目： | 国家科技攻关计划 , 林业部资助项目 |
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| 摘 要： | 为研究湿地-干草原植物多样性沿生境梯度变化规律及其影响因子，该文采用样线法从东、东北、西、西北4个方向沿着湿地-干草原生境梯度进行样方布设，4条样线共计布设样方123个.在物种多样性软件(BioDiversity Pro)及统计软件(Microcal Origin)的支持下，对外业调查资料进行处理，并进行物种多样性指数的计量，对宁夏盐池湿地-干草原生态系统物种多样性进行分析比较，结果表明:同一条样线的不同植被带（按照生境特征及植被类型分为湿生带、交错带和干旱草原带，简称“三带"）间物种多样性差异很大，无论是反映物种数量和种类的丰富度指数R，还是综合反映物种多样性的综合多样性指数Y，交错带都表现出了明显的优势，这正是交错带的边缘效应的体现.均匀度指数旱生带大于交错带，这与盐池草原生态系统植被恢复和荒漠化逆转、优势群落逐渐形成的实际状况相吻合.4条样线物种多样性计量结果表明:东样线和东北样线由于受人为干扰比较小，同时所处地形抬升比较小，使交错带拦截的物质、能量相对较多，所以东样线和东北样线各种多样性指标都高于其他两条样线，尤其东北样线的Simpson综合多样性指数D比最小的西北样线高39.92％.
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| 关 键 词： | 湿地-干草原生态系统 物种多样性 交错带 |
| 文章编号： | 1000-1522（2006）05-0012-06 |
| 收稿时间： | 2005-09-20 |
| 修稿时间： | 2005-09-20 |
Plant species diversity of wetland-dry grassland ecosystem: Taking Yanchi County, Ningxia Hui Autonomous Region as an example |
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| LI Rui,ZHANG Ke-bin,WANG Bai-tian,YANG Xiao-hui,QIAO Feng,YANG Jun-jie,YANG Li. Plant species diversity of wetland-dry grassland ecosystem: Taking Yanchi County, Ningxia Hui Autonomous Region as an example[J]. Journal of Beijing Forestry University, 2006, 28(5): 12-17 |
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| Authors: | LI Rui ZHANG Ke-bin WANG Bai-tian YANG Xiao-hui QIAO Feng YANG Jun-jie YANG Li |
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| Affiliation: | 1. Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, 100083, P. R. China; 2. Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, P. R.China. |
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| Abstract: | In order to study the changes along the biotope gradient and influencing factors to the plant species diversity in the ecotone of wetland and dry grassland ecosystem,sample line approach had been used along wetland-dry grassland biotope gradient and samples were located in four directions: east,northeast,west and northwest,and 123 sample plots were investigated in the four sample lines.With the help of computer software such as BioDiversity Pro,the biodiversity software and Microcal Origin,the statistical software and combining measurement of species diversity indices,this study analyzed and compared species diversity of wetland-dry grassland ecosystem in Yanchi County, Ningxia Hui Autonomous Region.The results showed that the same sample line in different zone of vegetation(divided into wet strip,ecotone strip and dry strip called "three strip") had obvious differences in species diversity. Whether R,the species richness index showing species amount and abundance, or Y,the comprehensive index of species diversity,both explained that the ecotone strip was of obvious predominance,which was a reflection of marginal effects.The evenness degree index in the dry strip was bigger than the one in the ecotone strip.This coincided with the reversal of desertification,the recovery of vegetation and the formation of the predominant communities.Measurements of species diversity of four sample lines showed that the northeastern and eastern sample lines had little artificial disturbance and smaller terrain movements.This indicates that the ecotone strip maintains greater substance,energy and information flows and that every diversity index in the northeastern and eastern sample lines has values above the other two sample lines.Especially the Simpson comprehensive diversity index D of the northeast sample line is 39.92% bigger than that of the northwest sample line,which is the smallest index. |
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| Keywords: | wetland-dry grassland ecosystem species diversity ecotone |
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