科尔沁沙地景观结构特征对沙漠化过程的生态影响

应用生态学报 ›› 2005, Vol. 16 ›› Issue (1): 59-64.

科尔沁沙地景观结构特征对沙漠化过程的生态影响

常学礼^1,2, 于云江¹, 曹艳英¹, 高玉葆¹

1. 南开大学生命科学学院, 天津, 300071;
2. 烟台师范学院地理与旅游系, 烟台, 264025;
3. 北京师范大学资源科学研究所, 北京, 100875

收稿日期:2003-09-23 修回日期:2004-07-19 出版日期:2005-01-15 发布日期:2005-01-15
通讯作者: 常学礼,1963年出生,博士,教授.主要从事景观生态学和恢复生态学研究,在国内外发表论文78篇.E-mail:xlchang@eyou.com
基金资助:
国家重点基础研究发展规划项目(G2000018607)和国家自然科学基金资助项目(49601020).

Ecological effects of landscape structure on desertification process of Keerqin sandy land

CHANG Xueli^1,2, YU Yunjiang¹, CAO Yanying¹, GAO Yubao ¹

1. College of Life Sciences, Nankai University, Tianjin 300071, China;
2. Department of Geography and Tourism, Yantai Normal College, Yantai 264025, China;
3. Institute of Resources Science, Beijing Normal University, Beijing 100875, China

Received:2003-09-23 Revised:2004-07-19 Online:2005-01-15 Published:2005-01-15

摘要/Abstract

摘要： 采用方差分析(ANOVA)、相关分析和回归分析,从时间和空间2个尺度对科尔沁沙地景观结构特征对沙漠化的生态影响进行了研究.结果表明,任何单一景观结构对沙漠化的影响都不明显.多因子PCA分析表明,景观结构对沙漠化有明显作用,它是景观承载了自然和人为作用后的景观要素组合对沙漠化的二次作用,是自然与人为作用的结果反馈.在时间尺度上,第一和第二分量占总信息量的90.26%,说明在过去40年中景观结构对沙漠化的影响相对简单,只有一个峰值.在空间尺度上,第一和第二分量占总信息量的80.20%,景观结构对沙漠化的驱动作用相对复杂,有2个峰值.这表明景观结构特征对沙漠化的影响在空间尺度上要比时间尺度上更为复杂.

关键词: 时空尺度, 沙漠化, 景观结构, 主成分分析

Abstract: By the methods of ANOVA, correlative analysis and regression analysis, this paper studied the ecological effects of landscape structure on desertification process of a typical Keerqin sandy land at spatial and temporal scales. The results showed that any single factor of landscape structure indices had no remarkable impact on desertification (significant at 95%). Principal component analysis (PCA) on the landscape structure indices suggested that landscape structure played an important role in desertification, because it reflected the interaction between natural changes and human being's activities and was the feedback of the interaction. At temporal scale, the contribution rate of the first and second vectors reached 90.26% of total information. There was a single peak in desertification, which indicated that the influence of landscape structure was simple during the past four decades. At spatial scale, the contribution rate of the first and second vectors was up to 80.20%, and there were two peaks in desertification, which indicated that the influence of landscape structure was more complicated at spatial scale than at temporal scale.

Key words: Temporal-spatial scale, Desertification, Landscape structure, Principal component analysis

中图分类号:

P208
Q149

常学礼, 于云江, 曹艳英, 高玉葆. 科尔沁沙地景观结构特征对沙漠化过程的生态影响[J]. 应用生态学报, 2005, 16(1): 59-64.

CHANG Xueli, YU Yunjiang, CAO Yanying, GAO Yubao . Ecological effects of landscape structure on desertification process of Keerqin sandy land [J]. Chinese Journal of Applied Ecology, 2005, 16(1): 59-64.

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