| 1973年至2004年贵州喀斯特山区石漠化风险格局的变化 |
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| 引用本文： | 张盼盼,胡远满,殷 洁,肖笃宁,李秀珍.1973年至2004年贵州喀斯特山区石漠化风险格局的变化[J].资源科学,2009,31(9):1561-1567. |
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| 作者姓名： | 张盼盼 胡远满 殷 洁 肖笃宁 李秀珍 |
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| 作者单位： | 中国科学院沈阳应用生态研究所 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 以贵州省普定后寨地下河流域中下游为例,采用景观生态学的研究方法,利用多时相多数据源的遥感影像(1973年的航片、1995年的TM影像及2004年的SPOT-5影像),从不同等级石漠化风险的角度分析了研究区近30多年来的石漠化风险格局变化的特征,以期了解喀斯特高原山区的石漠化变化特征规律.结果表明:从景观水平上来看,整个区域的景观正在向程度更高的石漠化风险的方向发展,表现为极低度石漠化风险斑块的面积呈现出逐渐减少的趋势,而高度和极高度石漠化风险斑块的面积却呈现出不断增加的趋势;从斑块类型水平上来看,不同等级的石漠化风险斑块的变化差异明显,在变化幅度和变化趋势上都存在差异,其中极低度石漠化风险斑块面积变化最为明显,呈现出大幅度的下降,而变化最不明显的是低度石漠化风险斑块,无明显的增减趋势.
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| 关 键 词： | 喀斯特高原山区 石漠化 风险格局变化 后寨 |
Characteristics of Rocky Desertification Risk Pattern Changes in Karst Mountainous Area from 1973 to 2004 |
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| ZHANG Panpan,HU Yuanman,YIN Jie,XIAO Duning and LI Xiuzhen.Characteristics of Rocky Desertification Risk Pattern Changes in Karst Mountainous Area from 1973 to 2004[J].Resources Science,2009,31(9):1561-1567. |
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| Authors: | ZHANG Panpan HU Yuanman YIN Jie XIAO Duning and LI Xiuzhen |
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| Abstract: | The changing patterns of rocky desertification risk on the Karst Plateau were studied through landscape ecological research in this paper. The study was based on time series remote sensing images (for example, aerial photographs of 1973, TM image of 1995 and SPOT-5 image of 2004) in the middle and lower reaches of Houzhai subterranean stream basin in Puding County. In order to understand the changing patterns of rocky desertification risk on Karst Plateau, different rocky desertification risk levels of more than 30 years rocky were analyzed. The results indicated that: the landscape of the whole study area was changing into a rocky desertification landscape with more serious risk, because rocky desertification patches with the lowest risk showed a decreasing trend while those with high and the highest risk was increasing. This meant that for a long time in the future, rocky desertification prevention and control should be strengthened at different risk levels and in different regions of the study area, following the adaptation principle on local conditions. Moreover, rocky desertification patches of different risk levels were different in changing scales and changing trends. Among them, rocky desertification patches with the lowest risk experienced the greatest change in area with a sharp decrease. The transformation of rocky desertification patches with the lowest risk to low risk ones was obvious. On the other hand, rocky desertification patches with low risk changed least in area. The changing scales and changing trends of the other three risk levels in rocky desertification were found between rocky desertification with the lowest risk and low rocky desertification risk. |
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| Keywords: | Karst Plateau Rocky desertification Risk pattern change Houzhai of Puding |
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