摘要
根据广西的生物多样性特征,以及因公路网络对景观结构的改变而造成的对生物多样性的潜在影响,文章主要通过公路阻隔效应指数(Ⅰ)及公路对生物多样性影响指数(B),运用GIS技术,以5km×5km的像元为单元格计算各指数的数值,从而确定广西公路建设对生物多样性影响的区域特征及差异。结果表明,桂北山区、桂西南岩溶山区和广西边缘山区是生物多样性最易受到公路建设影响的区域,这些地区的生物多样性敏感而特殊,需要特别注意采取必要的保护措施。
In order to reveal the highway construction impacts on local biodiversity and analyze the difference of those impacts over Guangxi Zhuang Autonomous Region, the following indexes were calculated based on the pixels of 5 km×5 km with GIS support. Biodiversity impact index （B） and segregation index （I） were applied to evaluate the intensity of potential impacts of highway construction on local biodiversity, and the segregation index （I） was the segregation grade of fauna and flora for a mesh in highway network. The result shows that, the North and southwest mountainous areas, and the marginal mountainous areas of Guangxi, are of high diversity in vegetation types and rich in endemic plants. For the sake of the highway management at present and the highway design and construction in future, special attention should be paid to biodiversity conservation and biological invasion prevention.
出处
《热带地理》
北大核心
2013年第1期70-75,共6页
Tropical Geography
基金
国家自然科学基金项目(41101176)
云南大学中青年骨干教师培养计划
广西壮族自治区交通厅科技项目
