| 人为干扰对额济纳胡杨林群落组成及更新的影响 |
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| 引用本文： | 陈维强,周伟磊,刘倩雯,李景文,曹德昌,郝鹏. 人为干扰对额济纳胡杨林群落组成及更新的影响[J]. 林业资源管理, 2010, 0(1) |
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| 作者姓名： | 陈维强 周伟磊 刘倩雯 李景文 曹德昌 郝鹏 |
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| 作者单位： | 北京林业大学,省部共建森林培育与保护教育部重点实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金项目(30570332);;国家“十一五”科技支撑项目课题(2008BAD0B05) |
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| 摘 要： | 额济纳绿洲是我国西北干旱地区的一道强大的生态防线。但由于水资源匮乏和人为干扰影响,绿洲中胡杨林已严重退化。我们认为人为干扰会对胡杨群落的组成和更新造成影响。应用双向指示种分析法(TWINSPAN)和典范对应分析(CCA),从人为干扰角度对额济纳不同地区胡杨群落进行了分类和排序。结果表明:人为干扰会影响群落林下物种多样性和根孽幼苗生长情况;林下物种多样性主要受旅游干扰影响,并与总干扰强度的关系遵循"中度干扰假说";根孽幼苗生长情况与放牧干扰呈负相关,当根孽幼苗数多的时候,一定程度上能够抵御外界干扰对其生长状况的影响;适度的人为干扰可以增加物种多样性,但要保证胡杨林的繁殖更新,需要以消除放牧干扰影响为前提。
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| 关 键 词： | 人为干扰 群落 组成 多样性 更新 |
Effects of Human Disturbance on the Composition and Regeneration of Populus euphratica Community in Ejina |
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| CHEN Weiqiang,ZHOU Weilei,LIU Qianwen,LI Jingwen,CAO Dechang,HAO Peng. Effects of Human Disturbance on the Composition and Regeneration of Populus euphratica Community in Ejina[J]. Forest Resources Management, 2010, 0(1) |
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| Authors: | CHEN Weiqiang ZHOU Weilei LIU Qianwen LI Jingwen CAO Dechang HAO Peng |
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| Affiliation: | The Key Laboratory for Silviculture and Conservation of Ministry of Education/a>;Beijing Forestry University/a>;Beijing 100083/a>;China |
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| Abstract: | Ejina oasis is a powerful eco-line of defense in northwest arid regions of China.However,due to water shortage,water pollution,and the impact of human disturbance,Populus euphratica forests have been severely degraded.We believe that human disturbance will affect the composition of Populus euphratica community and regeneration.The two-way indicator species analysis(TWINSPAN) and canonical correspondence analysis(CCA) were applied to classification and ordination of the Populus euphratica communities by the ... |
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| Keywords: | human disturbance community composition diversity regeneration |
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