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中国沙漠  1990, Vol. 10 Issue (2): 20-28    
论文     
沙漠化过程中植物群落组成的分析——以神木大保当地区为例
杨喜林, 邱国玉
中国科学院兰州沙漠研究所
Analysis of Community Composition in the process of Desertification
Yang Hsilin, Qiu guoyu
Institute of Desert Research,Academia Sinica,Lanzhou
 全文: PDF(620 KB)  
摘要: 沙漠化过程中,植被生活型谱中地面芽植物明显减少,隐芽植物增多。群落最小面积由潜在沙漠化阶段的45m2减少到沙漠化第5阶段的2.25m2。投影盖度为"s"型分布,油蒿群丛盖度大于臭柏群丛。油蒿群丛盖度达31.62%,臭柏群丛只有24.99%。Simpson指数减少,种均匀度指数增大,该变化趋势与森林、草原植被演替过程中均匀度的变化规律相反。或许为沙生植被所特有。群丛优势度指数增大。优势度-多样性曲线在沙漠化发生前和初期为对数正态分布,沙漠化后期为几何级数分布。
Abstract: Analysis of community composition in the process of desertification in Shenmu county, Shanxi Province,shows that. (1)The proportion of hemicry-ptophytes decreases obviously. (2)The minimum area decreases from 45m2 to 2. 25m2. (3)Coverage-desertification stage curve roughly likes a "s". The coverage of climax association is not the largest one in the desertification series. (4)The Simpson index of species decreases while its eveness and dominance increase in the development process of desertification. (5)The dominance-diversity curves of no desertification stage and initial desertification stage are roughtly of log-normal distribution. The curves apporache to a geometric progression distribution at the latest stage.
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杨喜林
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引用本文:

杨喜林, 邱国玉. 沙漠化过程中植物群落组成的分析——以神木大保当地区为例[J]. 中国沙漠, 1990, 10(2): 20-28.

Yang Hsilin, Qiu guoyu. Analysis of Community Composition in the process of Desertification. JOURNAL OF DESERT RESEARCH, 1990, 10(2): 20-28.

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http://119.78.100.150:82/zgsm/CN/        http://119.78.100.150:82/zgsm/CN/Y1990/V10/I2/20

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