| 祁连山东段山地景观异质性变化 |
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| 引用本文： | 刘宇,刘学录.祁连山东段山地景观异质性变化[J].甘肃农业大学学报,2010,45(4). |
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| 作者姓名： | 刘宇 刘学录 |
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| 作者单位： | 甘肃农业大学资源与环境学院,甘肃,兰州,730070 |
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| 摘 要： | 应用景观格局理论分析了祁连山东段山地景观的空间结构及异质性变化。结果表明:山地景观系统是由草地、森林、灌木、冰雪以及水域5种景观要素构成,其中草地为基质,水域为廊道。与1994年相比,2008年山地景观系统中草地和冰雪景观要素的多样性指数分别增加了49.0%和4.8%,但整体景观多样性和森林、灌木、水域的多样性指数却分别降低了1.9%、12.0%、3.4%、1.9%。山地景观系统中的整体景观优势度指数增大了12.8%,而景观均匀度却减小了1.9%,其中草地与冰雪景观要素的均匀度增大,分别增大了49.0%和4.8%,而其余的景观要素的均匀度均减小。山地景观系统的整体景观破碎度减小了22.27%,但森林景观要素的破碎度却增大了17.05%,其余景观要素破碎度均减小,其中灌木、水域、冰雪分别减小了32.82%,17.21%,11.96%。山地景观系统的整体景观分离度减小了9.81%,其中森林分离度减小最明显,为26.54%,其次为灌木景观,为11.0%,减小最不明显的的是冰雪,为0.9%。综上可知,14a中祁连山东段山地景观系统的景观异质性呈下降趋势。
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| 关 键 词： | 祁连山 景观异质性 景观多样性 |
Landscape heterogeneity changes in landscape system of eastern section of Qilian Mountain |
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| LIU Yu,LIU Xue-lu.Landscape heterogeneity changes in landscape system of eastern section of Qilian Mountain[J].Journal of Gansu Agricultural University,2010,45(4). |
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| Authors: | LIU Yu LIU Xue-lu |
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| Abstract: | Landscape pattern theory method is used for analysis the changes of spatial structure and heterogeneity in the eastern section of Qilian Mountain landscape.The results show that mountain landscape is constituted by five landscape elements.Grassland landscape element is matrix in mountain landscape.The water landscape distributes by linear and it is corridor in mountain landscape.The remaining elements of the landscape as a plaque mounted on the substrate and between the corridors.From 1994 to 2008,mountain landscape system which landscape diversity index system decreased by 1.9 %;in mountain landscape,the landscape diversity index increased in grassland and snow landscape element,the increased rates were 49.0 % and 4.8 %;The remaining elements of the landscape diversity index decreased.Mountain landscape system which landscape dominance index increased,the rate of increase was 12.8 %.In the mountain landscape,the forest landscape element,bush landscape element and water landscape element which landscape dominance index increased.But the lawn landscape element and snow and ice landscape element which landscape dominance decreased.The mountain landscape system which evenness decreased,the rate of decrease was 1.9 %.Mountain landscape which landscape fragmentation decreased,the rate of reduce was 22.27 %.The forest landscape element which landscape fragmentation increased 17.05 % and the others decreased.Mountain landscape system which landscape separation reduced,the rate of reduce was 9.81 %.In mountain landscape system,every landscape element which landscape separation was reduced.Comprehensive index of all the changes in landscape structure,we draw a conclusion as the mountain landscape system which landscape heterogeneity is reduced. |
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| Keywords: | Qilian Mountain landscape diversity landscape heterogeneous |
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