广西龙象谷南晓片区景观格局变化及其对鹭鸟生境的可能影响

Impacts on Herons Habitats from the Landscape Changes in the Dragon Valley,Guangxi Province

广西龙象谷紧邻鹭鸟保护区,但在北部湾经济一体化进程驱动下,龙象谷面临着大规模的规划建设,区内景观格局将发生显著变化,其对鹭鸟生境及其保护的影响尚不清晰。本研究利用3S技术,运用景观指数运算方法对广西龙象谷南晓片区规划前后景观格局产生的变化及其对鹭鸟生境可能产生的影响进行分析。结果表明:研究区景观破碎化程度增大,区域景观格局趋于复杂化、破碎化和多元化,景观类型丰富度增加,优势景观由用材林向绿地植被及建筑用地等转化;规划后水体景观将成为鹭鸟的主要觅食地,但由于水体景观镶嵌在绿地植被及道路景观中,因此,由于开发带来的人为干扰逐渐增多将会影响鹭鸟在水体景观中的觅食行为。景观格局分析是城市规划前期工作的重要内容,本研究能够对规划中鸟类生境的保护提供理论参考。

By the economic integration in the Beibu Gulf, the Dragon Valley in Guangxi Province had to confront the huge sweeping construction, although it is adjacent to the Ardeidae Reserve. Be face to the significant upcoming landscape change, the influences to the Ardeidae and its habitat are still unclear. We simulated the current landscape pattern and predicted the landscape pattern after the construction by the development planning in the Nanxiao District of the Dragon Valley and analyzed the landscape pat- tern change and its influence to the Ardeidae habitat by using landscape ecological methodology and the 3S technology. The result showed that the landscape fragmentation and pattern heterogeneity would rise; the dominant landscape would have turned from timber forest to construction land and urban green land; the open water area would be the major foraging site of the Ardeidae after construction, but for the in- creasing of the human interference and the adjacent roads, the open water would lost its ecological serv- ice function. The landscape pattern analysis can be an efficient methodology for understanding the eco- logical processes and it should play more important role in the preliminary work of urban planning. The study would give theoretical support to the bird habitat protection in the planning.