| 雅鲁藏布江中游河谷风沙化土地砂生槐群落结构特征 |
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| 作者姓名： | Yang ZP Shen WS Sun M Sun J Li HD |
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| 作者单位： | 国家环境保护部南京环境科学研究所,南京,210042 |
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| 基金项目： | 国家环保公益性行业科研专项 |
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| 摘 要： | 基于样方调查和等级聚类分析,研究了雅鲁藏布江中游风沙化土地不同恢复演替阶段砂生槐群落的结构特征.结果表明:雅鲁藏布江中游风沙化土地植物群落可分为砂生槐群落、固沙草群落、砂生槐＜固沙草群落、砂生槐-固沙草群落、藏沙蒿+砂生槐群落和砂生槐+藏沙蒿群落6种类型.自然恢复演替从流动沙丘上分布的砂生槐对流沙的初步固定开始,随后固沙草开始侵入群落,逐渐形成了砂生槐-固沙草群落.另一种演替途径开始于固沙草群落,砂生槐在演替过程中出现在固沙草群落中,最后亦达到砂生槐-固沙草群落阶段.在一些半固定沙地阶段,藏沙蒿开始侵入群落,形成砂生槐+藏沙蒿群落.雅鲁藏布江风沙化土地的顶极群落是以砂生槐为优势种的灌丛群落.随着坡度增加,砂生槐群落盖度和高度有降低的趋势.生物结皮对土壤的理化性质有一定的改善作用,结皮覆盖处土壤水分含量显著高于其他演替阶段的表层土壤水分含量.流动沙地砂生槐灌丛冠幅、株高和萌蘖枝数量最高,其次是固定沙地,半固定沙地最低.各阶段枯死枝数量说明固定沙地阶段以后砂生槐种群有衰退的趋势.
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| 关 键 词： | 雅鲁藏布江中游 风沙化土地 恢复演替 砂生槐 群落结构 |
Structural characteristics of Sophora moorcroftiana community on wind-sandy land in middle reaches of Yaluzangbu River |
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| Yang ZP,Shen WS,Sun M,Sun J,Li HD.Structural characteristics of Sophora moorcroftiana community on wind-sandy land in middle reaches of Yaluzangbu River[J].Chinese Journal of Applied Ecology,2011,22(5):1121-1126. |
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| Authors: | Yang Zhao-Ping Shen Wei-Shou Sun Ming Sun Jun Li Hai-Dong |
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| Institution: | YANG Zhao-ping,SHEN Wei-shou,SUN Ming,SUN Jun,LI Hai-dong(Nanjing Institute of Environmental Sciences,Ministry of Environmental Protection,Nanjing 210042,China) |
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| Abstract: | Based on quadrat investigation and hierarchical cluster analysis,this paper studied the structural characteristics of Sophora moorcroftiana community at its different restoration succession stages on the wind-sandy land in middle reaches of Yaluzangbu River.The plant community on the wind-sandy land could be divided into 6 types,i.e.,S.moorcroftiana community,Orinus thoroldii community,S.moorcroftiana < O.thoroldii community,S.moorcroftiana-O.thoroldii community,Artemisia weiibyii + S.moorcroftiana communit... |
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| Keywords: | middle reaches of Yaluzangbu River wind-sandy land restoration succession Sophora moorcroftiana community structure |
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