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分水前后黑河中游湿地景观破碎化过程及其驱动分析

发表时间:2014-03-15  浏览量:1464  下载量:615
全部作者: 姜朋辉,赵锐锋
作者单位: 西北师范大学地理与环境科学学院
摘 要: 在遥感和地理信息系统(geographic information system,GIS)技术的支持下,基于1992,2001,2010年的遥感影像,选取斑块密度(patch density,PD)指数、斑块平均面积(mean patch size,MPS)指数、斑块形状破碎化指数(mean patch shape fragmentation index, FS1)、面积加权平均斑块破碎化指数(area-weighted mean patch fragmentation index, FS2)等具有典型生态意义的景观指数,结合转移矩阵模型,系统分析了黑河中游湿地景观的破碎化过程,并采用主成分分析方法,探讨了影响研究区湿地景观破碎化过程的驱动因子。结果表明:黑河中游分水前后,研究区湿地景观破碎化主要表现为MPS的萎缩、PD的上升以及FS指数的增大。整个研究时段内,研究区湿地MPS减少了1.47 hm2,PD上升了0.002 ind/hm2. 导致黑河中游湿地景观破碎化发生和发展的驱动力包含自然和人文2个方面。自然因子对湿地景观破碎化进程的影响则主要体现在水文、气温和降水上,而且气温对湿地景观破碎化进程的影响程度明显大于降水。社会经济因子则主要体现在人口和工农业生产等方面。
关 键 词: 生态学;黑河中游;破碎化过程;驱动力
Title: Fragmentation process of wetlands landscape and its driving forces analysis in the middle reaches of the Heihe river around water redistribution
Author: JIANG Penghui, ZHAO Ruifeng
Organization: School of Geography and Environmental Science, Northwest Normal University
Abstract: In this paper, the wetland landscape fragmentation process of the middle Heihe river basin around water redistribution was analyzed by choosing some typical landscape index models, such as patch density (PD), mean patch size (MPS), mean patch shape fragmentation index (FS1) and area-weighted mean patch fragmentation index (FS2) based on satellite images of 1992, 2001 and 2010. Furthermore, the driving force of wetland landscape fragmentation process was researched through combining with Pearson correlation analysis, regression analysis and other analysis methods. The results indicated that fragmentation process of wetland landscape in the middle reaches of the Heihe river mainly expressed as the shrinkage of MPS, the increase of PD and the enlargement of FS. In the entire period of study, the MPS of the wetlands in middle Heihe river basin decreased 1.47 hm2 corresponding to the PD raised 0.002 ind/hm2. The dominant driving force which led to the middle reach of the Heihe river wetland landscape fragmentation and development included nature and human factors. The natural factors such as hydrology, temperature and precipitation had significantly influence on the process of wetland landscape fragmentation, and the temperature played a greater actor in the process of wetland landscape fragmentation compared with precipitation. The human factors mainly included population and industrial and agricultural production.
Key words: ecology; middle reach of the Heihe river; fragmentation process; driving forces
发表期数: 2014年3月第5期
引用格式: 姜朋辉,赵锐锋. 分水前后黑河中游湿地景观破碎化过程及其驱动分析[J]. 中国科技论文在线精品论文,2014,7(5):487-496.
 
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