我国南方典型红壤区景观格局对崩岗侵蚀的影响
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(4227071207)


Impact of landscape pattern on Benggang erosion in typical red soil region of southern China
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 文章评论
    摘要:

    崩岗是地质构造、地貌条件、气象水文、植被、人类活动等综合作用下形成的一种复合侵蚀地貌,崩岗的形成与发展已严重制约了当地农业生产和社会经济发展。通过调整土地利用结构方式、优化景观格局是防治红壤区崩岗侵蚀的重要手段。如何从斑块类型水平揭示景观格局与崩岗侵蚀的关系,对于控制崩岗侵蚀、提高生态环境效益具有重要意义。以福建省安溪县为例,运用ArcGIS水文分析工具和DEM数据将该区域划分为53个子流域,以崩岗面积与密度为响应变量,景观格局指数为解释变量,采用冗余分析(RDA)法和通径分析法,从斑块类型水平探讨景观格局指数与崩岗面积与密度的影响。结果表明:影响崩岗侵蚀的景观格局指数主要由土地利用类型决定,其中林地的景观格局指数对崩岗特征的解释度最高(63.82%),其次为耕地(49.19%)和建设用地(42.01%);耕地景观类型面积、林地聚集度、建设用地景观形状指数和林地斑块连接度4个指标显著影响崩岗特征,对崩岗特征变化的贡献率分别为51.5%、26.9%、9.2%和6.1%,且4个指标对崩岗特征的累积解释度达到66.2%;通径分析发现耕地景观类型面积、林地斑块连接度、林地边缘密度、林地斑块类型面积百分比和建设用地边缘密度的综合作用对崩岗面积变化和密度变化的解释程度分别为71%和85%,其中耕地景观类型面积和林地斑块类型面积百分比对崩岗面积和崩岗密度的影响最大,通径系数分别是0.499、-0.440和0.608、-0.342。总体而言,科学合理的规划耕地、林地和建设用地的空间布局,提升景观类型整体生态效应,对抑制崩岗侵蚀具有重要意义。研究结果对于科学规划土地利用、控制红壤区崩岗侵蚀具有重要指导意义。

    Abstract:

    Benggang, a compounded erosional landform influenced by geological tectonics, geomorphological conditions, meteorological hydrology, vegetation, and human activities, is widely distributed in southern China. The formation and development of Benggang severely restricted local agricultural production and socio-economy. Adjusting land use structure and optimizing landscape pattern are crucial ways to prevent Benggang erosion in red soil region of southern China. How to investigate the relationship between landscape pattern and Bengggang erosion at patch-class level, which is of great significance for controlling Benggang and improving eco-environmental benefits. Herein, a case study with regard to investigate the impact of landscape indices of various patch types on the area and density of Benggang in Anxi County, Fujian Province in southern China. The study area was divided into 53 sub-watersheds based on DEM data using the ArcGIS hydrological analysis tool. The area and density of Benggang were taken as the response variables, and the landscape pattern indices were the explanatory variables. Effects of landscape pattern indices on the response variables were determined by redundancy analysis (RDA) and path analysis at patch-class level. The results indicated that the landscape metrics affecting Benggang erosion were mainly determined by land use types. Specifically, the landscape metrics of woodland had the highest interpretation (63.82%), followed by farmland (49.19%) and land used for building (42.01%). The total class area of farmland, clumpiness of woodland, landscape shape index of land used for building, and patch cohesion index of woodland contributed to 51.5%, 26.9%, 9.2%, and 6.1% of Benggang erosion, respectively. Meanwhile, the integrated impacts of these four variables could explain 66.2% of Benggang variance. Furthermore, the path analysis results showed that the total class area of farmland, patch cohesion index of woodland, edge density of woodland, percentage of landscape of woodland, and edge density of land used for building could jointly explain 71% of the variation in Benggang area and 85% of the Benggang density. Among these five landscape patterns, the total class area of farmland and area percent of landscape of woodland were the most critical factors to Benggang area and density, and the path coefficients were 0.499, -0.440 and 0.608, -0.342, respectively. In general, a scientific spatial layout (such as farmland, woodland, and land used for building) benefits to an improved ecological effect of landscape types, significantly influencing the control of Benggang. This study facilitates scientific planning of land utilization and provides effective measures for Benggang control in red soil region of southern China.

    参考文献
    相似文献
    引证文献
引用本文

蔡源远,崔婷婷,刘政,魏玉杰.我国南方典型红壤区景观格局对崩岗侵蚀的影响.生态学报,2024,44(7):2817~2825

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数: