| 共和盆地沙质荒漠化过程植被群落特征变化 |
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| 引用本文： | 魏婷婷,吴波.共和盆地沙质荒漠化过程植被群落特征变化[J].生态环境,2011,20(12):1788-1793. |
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| 作者姓名： | 魏婷婷 吴波 |
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| 作者单位： | 1. 中国林科院森环森保所,北京,100091
2. 中国林科院荒漠化研究所,北京,100091 |
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| 基金项目： | 国家林业局公益专项(201104035); “985”平台基金项目(000-1115000) |
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| 摘 要： | 青海共和盆地是我国西部荒漠化比较严重地区之一。荒漠化不仅表现为植被结构和功能的退化，也伴随着土壤性质的退化。作者对共和盆地典型荒漠化区域设置样带进行植被、土壤调查，利用TWINSPAN对研究区植被进行数量分类，在此基础上确定荒漠化发展阶段类型及所包含的植被群落类型，分析了不同荒漠化发展阶段的植被群落组成、盖度、生物量及土壤质地、有机质和全氮含量。结果表明：研究区荒漠化梯度划分为未退化草地、轻度退化草地、轻度沙化草地、中度退化草地、中度沙化草地。随着荒漠化的发展，群落组成从简单趋于复杂再到简单；群落盖度逐渐减小，其中未退化草地样方的平均盖度达到48．40％4±3．25％，而中度沙化草地的平均盖度仅为15．34％±2．78％；轻度干扰下样方群落生物量先增加，随着干扰加剧，生物量逐渐减小，轻度退化草地地上、地下及总生物量均最高，中度沙化草地的均最低；土壤0-20cm，20-40cm层有机质和全氮含量逐渐减小，粒度组成也发生明显变化。沙化对土壤有机质、全氮含量及粒度组成的影响显著。
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| 关 键 词： | 共和盆地 沙质荒漠化 植被群落特征 |
Changes of vegetation community features of sandy desertification process in Gonghe basin of Qinghai |
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| WEI Tingting
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WU Bo.Changes of vegetation community features of sandy desertification process in Gonghe basin of Qinghai[J].Ecology and Environmnet,2011,20(12):1788-1793. |
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| Authors: | WEI Tingting WU Bo |
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| Institution: | WEI Tingting1,WU Bo2 1.Research Institute of Forset Ecology,Environment and Protection,Chinese Acedemy of Foresty,Beijing 100091,2.Research Institute of Desertification |
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| Abstract: | Gonghe basin in Qinghai is one of the most seriously desertificated region in western of China.Desertification means not only degradation of vegetation structure and function,but also soil degradation.We investigated the vegetation and soil in the typical region by belt transect method.Based on TWINSPAN vegetation quantitative classification,the classification of desertification was identified,and the characteristics of vegetation and soil were analyzed.The vegetable indicators included community coverage a... |
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| Keywords: | Gonghe basin sandy desertification features of plant community |
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