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三峡库区典型次级河流河岸植被分布格局——以重庆东河为例

孙荣**,邓伟琼,李修明   

  1. (华侨大学化工学院, 福建厦门 361021)
  • 出版日期:2015-10-10 发布日期:2015-10-10

Distribution pattern of riparian vegetation along Donghe River, a tributary of the Three Gorges Reservoir area.

SUN Rong**, DENG Wei-qiong, LI Xiu-ming   

  1. (College of Chemical Engineering, Huaqiao University, Xiamen 361021, Fujian, China)
  • Online:2015-10-10 Published:2015-10-10

摘要:

采用双向指示种分析法(TWINSPAN)和去趋势典范对应分析法(DCCA),以三峡库区典型次级河流澎溪河上游东河为研究对象,从植物种、植物群落与环境因子之间的相互关系,研究山地河流河岸植被的空间分布规律。结果表明:河岸植物群落包括4个森林类型、11个灌丛和灌草丛类型。海拔和人为干扰对河岸带植物群落空间分布具有主导作用。河岸植物群落具有明显的沿海拔梯度变化的垂直梯度格局;沿河流纵向和侧向梯度变化,河岸植物群落具有典型的“斑块状、片段化”分布格局;从流域整体看,河岸植物群落具有典型的次生性特征。
 

关键词: 南设得兰群岛, 地理加权回归, 空间异质性, 南极磷虾, 最小二乘法

Abstract: Using the methods of TWINSPAN and DCCA, this paper studied the spatial distribution of the plant communities in Donghe River, in terms of the interactions between plant species and communities and environmental factors. The results showed that the riparian plant communities were classified into 15 types including 4 forest types and 11 shrub and grassland types. Elevation and human disturbance played a dominant role in spatial distribution of the riparian plant communities. Plant communities had a significant altitudinal pattern. Along longitudinal and lateral gradients of the river, plant communities presented a fragmentation pattern. The composition and types reflected that the riparian plant communities were typical secondary plant ones.

Key words: spatial heterogeneity, geographically weighted regression (GWR), Antarctic krill, least square model, South Shetland Islands