基于最小累计阻力面模型的 博斯腾湖流域景观格局的分析与优化

位宏, 徐丽萍 , 李晓蕾

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石河子大学学报 ›› 2018, Vol. 36 ›› Issue (2) : 169-175. DOI: 10.13880/j.cnki.65- 1174/n.2018.02.007
生物·环境

基于最小累计阻力面模型的 博斯腾湖流域景观格局的分析与优化

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Analysis and optimization of landscape patter n in Boston Lake Basin based on minimum cumulative resistance

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摘要

景观格局优化是维持区域生态系统功能稳定的重要手段。以博斯腾湖流域为研究区,在 RS 和 GIS 的支持下对遥感 影像进行解译判读,获得土地利用图,分析了景观格局演变特征,并运用最小累积阻力面模型对流域景观进行风险评价, 提出相应的优化措施。结果表明:(1)草地仍是最主要的土地利用类型,水域面积减少 67.85%,未利用地、城镇用地和耕地 大幅增加,林地增幅不明显;(2)流域整体景观破碎化程度下降,景观斑块趋于规则化;(3)流域景观安全水平以较低安全 等级为主,中等安全等级分布比较零散,较高安全等级主要分布在环博斯腾湖附近,高安全等级主要分布在流域西南部 和博斯腾湖附近。

Abstract

Landscape pattern optimization is vital to maintain the stable function of regional ecosystem. In the present study, we interpreted remote sensing images of the Boston Lake basin by using RS and GIS, obtained land- use maps, and analyzed the evolution characteristics of landscape pattern. Meanwhile, minimum cumulative resistance model was used to evaluate the risk of the basin landscape, and the corresponding optimization measures were put forward. The results were as follows: (1) Grassland was still the main land- use type, and the water area reduced 67.85%; the unused land, urban land and arable land increased greatly, whereas the increase of forest land was not significant. (2) The overall landscape fragmentation level of the basin decreased, and the landscape patches tended to be regular. (3) The level of landscape security in the basin was mostly the lower; the distribution of medium security level areas were relatively scattered with high safety mainly distributed around the Boston Lake; the high security level areas were mainly distributed in the southwest of the basin and nearby the Boston Lake.

关键词

阻力模型 / 景观优化 / 博斯腾湖地区 / 土地利用 / 覆被变化

Key words

resistance model / landscape optimization / Boston Lake Basin / land use/cover change

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位宏, 徐丽萍 , 李晓蕾. 基于最小累计阻力面模型的 博斯腾湖流域景观格局的分析与优化. 石河子大学学报. 2018, 36(2): 169-175 https://doi.org/10.13880/j.cnki.65- 1174/n.2018.02.007
Wei Hong, Xu Liping, Li Xiaolei. Analysis and optimization of landscape patter n in Boston Lake Basin based on minimum cumulative resistance. Journal of Shihezi University. 2018, 36(2): 169-175 https://doi.org/10.13880/j.cnki.65- 1174/n.2018.02.007

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基金

国家自然科学基金项目(31760151,41001387)
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