ZHAO Qinghe,XU Shanshan,MA Lijiao,et al.Analysis of Plant Species Diversity Under Different Vegetation Types in Riparian Zone of the Main Stream of Beijiang River[J].Research of Soil and Water Conservation,2017,24(05):215-221.
北江干流河岸带不同植被类型植物物种多样性分析
- Title:
- Analysis of Plant Species Diversity Under Different Vegetation Types in Riparian Zone of the Main Stream of Beijiang River
- Keywords:
- riparian zone; species diversity; environmental factors; redundancy analysis; Beijiang Basin
- 分类号:
- Q142
- 摘要:
- 以北江干流河岸带4种典型植被类型（竹林、草地、混交林和桉树林）为研究对象，采用样方法调查分析其群落特征和物种多样性，运用冗余分析（RDA）探讨北江河岸带植物物种多样性与环境因子之间的关系。结果表明：北江河岸带植物物种受热带季风气候影响，植物种类繁多，共调查到59科116属136种植物，群落科属组成分散；4种植被类型的物种丰富度、Shannon-Wiener多样性和均匀度指数变化规律一致，均以混交林最高，竹林次之，桉树林最低，但各植被类型间差异并不显著，说明北江河岸带不同植被类型维持物种多样性的异质性较小，其作用更多体现在为不同物种提供栖息地；RDA结果显示，植物物种丰富度、均匀度和多样性指数与乔木层高度、草本层盖度和海拔均呈正相关，而与至河流距离和土壤含水量呈负相关，在选取的7个环境因子中，海拔对北江河岸带植物物种多样性的影响最大，土壤含水量影响次之，至河流距离影响最小。
- Abstract:
- Taking 4 kinds of typical vegetation types such as the bamboo forest, grassland, mixed forest, and eucalyptus forest in the riparian zone along the Beijiang River as the research samples, using the quadrat sampling method and the redundancy analysis (RDA), we conducted the study to investigate the community characteristics and species diversity of riparian vegetation as well as the relationship between plant species diversity and environmental factors. The results showed that, influenced by the tropical monsoon climate which can provide suitable hydrothermal conditions for the growth of plants, 136 species belonging to 116 genuses and 59 families were found in the riparian zone of Beijiang River. With regarding to species diversity of different vegetation types, changes in richness index, Shannon-Wiener diversity index, and evenness index of the riparian plant species were consistent with each other, namely, ranking from high to low in the order of mixed forest, bamboo forest, grassland, and eucalyptus forest. Nevertheless, there was no significant difference among the 4 vegetation types, indicating that there was less heterogeneity in maintaining species diversity between different riparian vegetation types, and then the services of riparian zone in maintaining species diversity mainly was reflected in providing habitats for different species. RDA result showed that, the richness, evenness, and diversity indexes of the plant species were positively correlated with the tree height, herbaceous coverage, and altitude, and were negatively correlated with the distance away from the river and soil moisture content. In general, among the 7 environmental factors we selected, altitude exhibited the greatest influence on the species diversity of the plants in the riparian zone along Beijiang River, and then followed by the soil moisture content, while the influence of the distance away from the river was the least.
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备注/Memo
收稿日期:2016-07-30;改回日期:2016-08-12。
基金项目:国家自然科学基金项目（41301197）；中国博士后科学基金资助项目（2014M550382，2015T80766）；河南省高校科技创新团队支持计划（16IRTSTHN012）
作者简介:赵清贺(1982-),男,河南开封人,博士,讲师,主要从事流域景观格局与生态过程研究。E-mail:zqh410224@126.com