| 岷江干旱河谷植物群落生态梯度分析 |
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| 引用本文： | 冶民生,关文彬,白占雄,马克明,刘国华,汪西林.岷江干旱河谷植物群落生态梯度分析[J].中国水土保持科学,2005,3(2):70-75. |
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| 作者姓名： | 冶民生 关文彬 白占雄 马克明 刘国华 汪西林 |
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| 作者单位： | 1. 北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室,北京,100083
2. 中国科学院生态环境研究中心系统生态重点实验室,北京,100085 |
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| 基金项目： | 国家重点基础研究发展规划项目"长江流域生物多样性变化、可持续利用与区域生态安全"(G2000048607) |
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| 摘 要： | 为干旱河谷地区的植被恢复和生物多样性的保育提供科学依据,运用数量排序方法DCCA,就岷江干旱河谷调查的植被和环境数据进行排序分析,研究该地区植物群落分布与环境梯度之间的关系,并用主成分分析法,研究该地区灌丛地上生物量与环境因子之间的关系。DCCA排序结果表明,该地区植被的分布是土壤水分、土壤养分和微地形三者综合作用的结果;主成分分析结果表明,影响灌丛群落地上生物量的第1主成分中,土壤pH值、速效P、全N、有机质含量和坡向的影响较大,影响灌丛群落地上生物量的第2主成分因子,主要是土壤含水量和海拔,第3主成分因子,主要是土壤速效K,第4主成分因子,主要是地形中的坡度因子。灌丛地上生物量,也受土壤养分、水分、地形三者共同的影响和作用。
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| 关 键 词： | 植物群落 生态梯度 DCCA排序 主成分分析 地上生物量 环境因子 岷江干旱河谷 |
| 修稿时间： | 2004年10月28 |
Ecological gradient of plant community in the dry valley of Minjiang River |
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| Ye Minsheng,GUAN Wenbin,Bai Zhanxiong,MA Keming,Liu Guohua,Wang Xilin.Ecological gradient of plant community in the dry valley of Minjiang River[J].Science of Soil and Water Conservation,2005,3(2):70-75. |
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| Authors: | Ye Minsheng GUAN Wenbin Bai Zhanxiong MA Keming Liu Guohua Wang Xilin |
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| Institution: | 1.College of Soil and Water Conservation, Beijing Forestry University, Key Lab. of Soil and Water Conservation of Ministry of Education, 100083; 2.Key Lab. of Systems Ecology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, 100085: Beijing, China |
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| Abstract: | To provide scientific accordance for vegetation rehabilitation and biological diversity protection, quantitative analysis method-DCCA ordination was used to analyze the vegetation and environmental data to reveal the relationship of ecological gradient and the distribution of plant community in the dry valley of the Minjiang River. Then the relationship of ground biomass of different shrubs and environmental factors were studied using principal component analysis. The result of DCCA ordination showed that the distribution of vegetation in the region is affected synthetically by soil moisture, soil nutrient and micro-topography. Principal component analysis showed that soil pH value, readily available P, Total N, soil organic matter and aspect of slope as the first principal component had effects on ground biomass of shrubs. The second principal component mainly included soil moisture and altitude. The third and forth principal component mainly consisted of soil readily available K and slope gradient respectively. Ground biomass of main shrub is also affected synthetically by soil nutrient, soil moisture and topography. |
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| Keywords: | plant community ecological gradient DCCA ordination principal component analysis ground biomass environmental factors the dry valley of the Minjiang River |
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