笔者从黄河源区河漫滩湿地地理地形指标和植物群落指标出发,分析和研究黄河源区河漫滩湿地退化过程中植被变化特征。结果表明：从整个退化演替过程来看,在演替初期,黄河源区河漫滩湿地以藏嵩草为主,随着演替的进行,藏嵩草的重要值逐渐降低,杂草和毒草的重要值逐渐增加,并在河漫滩湿地中占有一定的位置,物种多样性增加,群落的结构趋向复杂,丰富度越来越大。
Abstract
The authors analyzed vegetation change characteristics during degradation succession in floodplain wetlands of the Yellow River Source Zone by geographyopography index and phytocoenosium index. The results showed that in terms of the entire degradation succession, floodplain wetland was dominated by Kobresia tibetica at the beginning of succession. With the process of succession, Kobresia tibetica gradually decreased, and weeds and poisonous weeds gradually increased, and played certain roles in floodplain wetland. Plant diversity increased, and plant community structure tended to be complex, species richness was higher and higher.
关键词
黄河源区;河漫滩湿地;植被特征;退化演替
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Key words
the Yellow River Source Zone; floodplain wetlands; vegetation characteristics; degradation
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