安徽省安庆市沿江沼泽湿地恢复空间分析
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国家自然科学基金项目“面向生态服务能力提升的沼泽湿地空间格局优化方法研究”(41601452);中国科学院流域地理学重点实验室开放基金项目“遥感与GIS技术支持的沼泽湿地空间恢复决策研究:以安庆沿江为例”(WSGS2015009);中国博士后科学基金项目“SAR与可见光图像融合关键技术研究”(2016M602005)


Spatial Analysis on Wetland Restoration Along Yangtze River in Anqing City, Anhui Province
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    摘要:

    [目的]对安徽省安庆市沿江沼泽湿地区的沼泽湿地生态系统恢复进行空间分析,为沼泽湿地生态环境的改善提供科学依据。[方法]针对安庆市沿江沼泽湿地退化严重的现状,在分析区域功能特征的基础上,构建沼泽湿地空间恢复模型,并实现区域内沼泽湿地空间恢复,继而得到沼泽湿地优先、次优先恢复以及不可恢复级别。最后从整体景观效果和沼泽湿地功能两个恢复角度评价沼泽湿地恢复效果。[结果]安庆市沿江沼泽湿地恢复面积为5.78×104 hm2,在现有沼泽湿地面积基础上提高了35.78%。以耕地为主,占沼泽湿地恢复面积的91.43%。其中,优先恢复面积为2.92×104 hm2,主要分布于研究区的中北部地区;次优先沼泽湿地恢复面积为2.86×104 hm2。不可恢复面积为3.61×104 hm2,主要为水域、建筑用地等不可变更区域。[结论]经过恢复效果验证,从景观整体格局分析可知,沼泽湿地恢复后,研究及区域内沼泽湿地的斑块数量减少,而平均斑块密度增加,聚集度指数增加,景观多样性指数上升,说明沼泽湿地恢复实施后,景观格局更有利于朝着沼泽湿地生态功能的发挥,对维护区域生态安全具有很大的现实意义。

    Abstract:

    [Objective] Conducting a spatial analysis on wetlands ecosystem restoration along Yangtze River in Anqing City, Anhui Province, in order to provide scientific basis for improving the wetland ecological environment. Wetland restoration is critical to manage these conditions.[Methods] In this study, hydrological regulation and habitat suitability, as the most important functions of wetland, were selected to identify suitable wetland restoration sites. Using these two function layers, together with the spatial analysis function of geographic information system(GIS) and remote sensing(RS) image data, we identified and prioritized suitable sites for wetland restoration in the study area. Those areas which have high hydrological regulation and are good or fair habitat suitability for water birds, can support wetland restoration. The potential sites were prioritized in terms of patch size and proximity of natural wetlands and water bodies.[Results] We obtained two priority classes(the high one and a low one) of wetland restoration in a spatial scale. The results of this study showed that the areas with high and low priority classes for wetland restoration are 82 628 and 247 039 hm2, respectively, which account for 1.23% and 3.67% of the total study area.[Conclusion] The high-priority class areas would be used for the wetland restoration. Besides the wetland restoration in the northeast region, wetland landscape pattern is also more advantageous for wetland ecological function. It will provide scientific basis for the implementation of northeast region wetland restoration.

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董张玉,杨学志,王宗明,周芳,艾加秋,贾璐.安徽省安庆市沿江沼泽湿地恢复空间分析[J].水土保持通报,2017,37(6):178-183,188

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  • 收稿日期:2017-04-11
  • 最后修改日期:2017-05-09
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  • 在线发布日期: 2018-01-19
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