| 基于两种新型景观指数的张掖绿洲植被格局动态研究 |
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| 引用本文： | 刘传胜,张万昌,雍斌.基于两种新型景观指数的张掖绿洲植被格局动态研究[J].地理科学,2008,28(1):59-65. |
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| 作者姓名： | 刘传胜 张万昌 雍斌 |
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| 作者单位： | 1. 南京大学国际地球系统科学研究所, 江苏 南京210093;2. 中国科学院大气物理 研究所东亚区域气候-环境重点实验室 全球变化东亚区域研究中心, 北京 100029 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，中国科学院百人计划项目，中国科学院大气物理研究所东亚区域气候-环境重点实验室开放基金 |
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| 摘 要： | 通过遥感与GIS技术分析张掖绿洲植被格局动态,验证了Frohn(1998)提出的两种新型景观指数PPU(Patch Per Unit)和SqP(Sq)Square Pixel]在时间序列上对于植被景观格局分析的适用性和敏感性。分析结果显示PPU和SqP(Sq)指数分别对应聚集度和分维数这两种传统景观指数呈相似的变化趋势和统计相关性,但其针对景观类型的变异系数相对于聚集度和分维数都较高,即其指数值对各植被斑块类型辨识的敏感性更强,对景观破碎化程度和斑块形状复杂度的时空演变具有更好的预测性。通过对新型景观指数特性的分析及动态对比,表明张掖绿洲植被景观的空间异质性和斑块形状复杂度呈现逐渐增强的总体态势。
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| 关 键 词： | 植被格局 景观破碎化 斑块形状复杂度 遥感 |
| 文章编号： | 1000-0690（2008）01-0059-07 |
| 收稿时间： | 2006-10-24 |
| 修稿时间： | 2007-04-12 |
Vegetation Pattern Dynamics in Zhangye Oasis Based on Two New Landscape Metrics |
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| LIU Chuan-Sheng,ZHANG Wan-Chang,YONG Bin.Vegetation Pattern Dynamics in Zhangye Oasis Based on Two New Landscape Metrics[J].Scientia Geographica Sinica,2008,28(1):59-65. |
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| Authors: | LIU Chuan-Sheng ZHANG Wan-Chang YONG Bin |
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| Institution: | 1. International Institute for Earth System Science (ESSI), Nanjing University, Nanjing, Jiangsu 210093;2. Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | By using RS and GIS techniques,PPU(Patch Per Unit) and SqP(Sq)(Square Pixel),the two new landscape metrics proposed by Frohn(1998),were utilized in dynamic analyses on vegetation pattern of Zhangye Oasis and proved to have favorable applicability and sensitivity in temporal landscape pattern analyses.It was demonstrated that the new metrics had similar transformation trends and statistical dependence for temporal landscape pattern analyses by comparison with the traditional landscape metrics(Contagion and Fractal Dimension).It was also found that PPU and SqP(Sq) showed more sensitivity than the traditional ones because of their higher coefficient of variation,thus the new metrics were provided with better predictable ability and sensitivity for landscape fragmentation and patch shape complexity,and had advantages in distinguishing the patch types comparing to Contagion and Fractal Dimension.Computation on new landscape metrics and dynamic analysis of landscape metrics behaviors for these time series images clearly revealed the general evolution trend of the oasis from fragmentation to contagion with the gradual enhancement trend of the spatial heterogeneity and patch shape complexity. |
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| Keywords: | PPu SqP(Sq) |
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