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生态学杂志 ›› 2012, Vol. 31 ›› Issue (10): 2651-2656.

• 研究报告 • 上一篇    下一篇

广西西江经济带生态重要性分区及其与建设用地的空间叠置关系

李平星**   

  1. (中国科学院南京地理与湖泊研究所, 南京 210008)
  • 出版日期:2012-10-10 发布日期:2012-10-10

Ecological importance zoning and its spatial overlay relationships with construction lands in Xijiang River Economic Belt of Guangxi, South China.

LI Ping-xing**   

  1. (Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)
  • Online:2012-10-10 Published:2012-10-10

摘要: 生态重要性评价是识别重要生态功能区、优化区域空间开发格局的有效途径。本文提出了基于生态因子适宜性和生态区位重要性的分项评价、进行生态重要性整合分析的研究思路,以广西西江经济带为案例区,开展生态重要性评价及其与现状建设用地的空间叠置关系研究。结果表明,经济带极重要区、很重要区、重要区、一般区、不重要区所占比重分别为16%、36%、17%、15%、16%;西部地区重要性相对较高,东部地区重要性居中,中部地区重要性较低。已有城镇建设用地和农村居民点主要分布在不重要区、重要区和很重要区,工矿用地分布相对分散。依据重要性评价结果进行有选择、有导向的生态空间占用,可在一定程度上减轻区域工业化和城镇化所带来的生态环境压力,实现区域可持续发展。

关键词: 灌丛生态系统, 石漠化, 植物养分, 土壤养分

Abstract: The evaluation of ecological importance is an effective way to identify the important ecological function areas and to optimize the regional spatial development pattern. In this paper, a model for evaluating the ecological importance by integrating the suitability of ecological factors and the importance of ecological locations was proposed, and, taking the Xijiang River Economic Belt of Guangxi as a case, the spatial zoning of ecological importance and its spatial overlay relationships with the distributions of current construction lands were studied. In the Belt, the zones with extremely important, very important, important, general, and unimportant ecological importance accounted for 16%, 36%, 17%, 15% and 16% of the whole area, respectively. The western part of the Belt had a relatively high importance, followed by the eastern part, while the central part had the least one. The existed construction lands in cities and towns and the rural lands were mainly located at unimportant, important, and very important zones, whereas the industrial and mining lands were in relatively dispersed distribution. To a certain extent, a selective and oriented ecological spatial occupation based on the evaluation of ecological importance could alleviate the ecoenvironmental pressure induced by regional industrialization and urbanization, and thus, realize regional sustainable development.

Key words: shrub ecosystem, rocky desertification, plant nutrient, soil nutrient.