湘西山区土地利用变化及其生态环境效应研究——以张家界市永定区为例
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Landuse Changes and Their Effects on Ecological Environment in the Mountainous Areas in Western Hu' nan Province
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    摘要:

    随着人[1的增加和经济的发展,人类对土地的干预程度也越来越大,导致土地利用方式发生巨大改变,引发了-系列生态环境问题,特别在-些生态环境脆弱的山区,不合理的土地利用方式对生态环境产生巨大的负面影响,严重阻碍区域经济的可持续发展。以张家界市永定区为例,对湘西山区土地利用变化状况以及其生态环境效应进行了研究。结果表明,随着城市的扩张,该区居民、工矿和交通等建设用地持续扩大,耕地面积减少,耕地质量下降,天然林破坏严重,生态功能减弱。相应地,土地利用/覆被变化导致了诸多生态环境问题,如水土流失加剧,水质恶化,生物多样性降低等,使该区生态环境质量下降。

    Abstract:

    As a result of population growth and economic development, t he intensity of landuse has been in- creased greatly, which has had and continues to have a negative impact on environment, especially in the mou ntainous areas with fragile ecological environment.Unreasonable landuse in the mountainous areas has a negative impact on ecological environment and sustainable economic development.Taking Yongding dist rict of Zhangjiajie City Hu’nan Province for an example, this paper reveals land use changes and their effects on ecological environment in the mountainous area of Western Hu 'nan Province.Results indicate that, with the growt h of urban area, the construction area, containing residing area, mining area, and transportation area have been increasing continually, while the area and qualit y of cultivated land have been decreasing gradual- ly.A large amount of natural forest has been cut down, which weakens the ecological functions.Land use changes have enormously influenced the ecological environment, such as intensive soil erosion, worsening of t he water quality, and biodiversity loss.

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杨凯,曾永年,历华.湘西山区土地利用变化及其生态环境效应研究——以张家界市永定区为例[J].水土保持通报,2007,(6):178-183

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  • 收稿日期:2007-02-26
  • 最后修改日期:2007-07-24
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  • 在线发布日期: 2014-12-16
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