| Landscape Dynamics and Driving Factors in Da＇an County of Jilin Province in Northeast China During 1956-2000 |
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| 作者单位： | WANG Zongming（Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China） ;
ZHANG Yubo（Software College of Jilin University,Changchun 130026,China） ;
ZHANG Bai（Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China） ;
SONG Kaishan（Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China） ;
GUO Zhixing（Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China） ;
LIU Dianwei（Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China） ;
LI Fang（Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130012,China） ; |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程项目，Key Project of Chinese Academy of Sciences for Developing Science and Technology of Northeast China |
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| 摘 要： | The landscape pattern of Da＇an County, Northeast China has undergone significant changes since the 1950s as a result of climatic change and human activities. The aim of this paper is to quantitatively study landscape pattern and its spatial dynamics of Da＇an County at the landscape level over the nearly 50-year span. Patch dynamics were examined according to land use and land cover change processes built from a series of images, as well as topographic maps, and temporal patterns built from landscape pattern metrics. The transition matrix of landscape patch types and changes of various landscape metrics were applied. The results showed that, from 1956 to 2000, the landscape within the study area had undertaken a complicated evolution in landscape structure and composition. The outstanding characteristic is that saline-alkali land increased and grassland decreased. As some smaller patches amalgamated, the heterogeneity of patch decreased. All those changes were the synthetic result of both climatic and anthropogenic influences, but the predominant factor was different in different parts. In the southern part of the study area, the landscape pattern changes resulted from the modification of climate obviously, while in the northern part, the landscape pattern changes were mainly caused by human activities, such as the conversion between farmland and saline-alkali land. This phenomenon showed that human activities played more important role in the north than in the south of Da＇an County.
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| 关 键 词： | 盐碱地 景观演变 东北地区 中国 |
Landscape dynamics and driving factors in Da’an County of Jilin Province in Northeast China during 1956–2000 |
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| Authors: | Zongming Wang Yubo Zhang Bai Zhang Kaishan Song Zhixing Guo Dianwei Liu Fang Li |
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| Institution: | [1]Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China [2]Software College of Jilin University, Changchun 130026, China |
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| Abstract: | The landscape pattern of Da'an County,Northeast China has undergone significant changes since the 1950s as a result of climatic change and human activities.The aim of this paper is to quantitatively study landscape pattern and its spatial dynamics of Da'an County at the landscape level over the nearly 50-year span.Patch dynamics were examined according to land use and land cover change processes built from a series of images,as well as topographic maps,and temporal patterns built trom landscape pattern metrics.The transition matrix of landscape patch types and changes of various landscape metrics were applied.The results showed that,from 1956 to 2000,the landscape within the study area had undertaken a complicated evolution in landscape structure and composition.The outstanding characteristic is that saline-alkali land increased and grassland decreased.As some smaller patches amalgamated,the heterogeneity of patch decreased.All those changes were the synthetic result of both climatic and anthropogenic influences,but the predominant factor was different in different parts.In the southern part of the study area,the landscape pattern changes resulted from the modification of climate obviously,while in the northern part,the landscape pattern changes were mainly caused by human activities,such as the conversion between farmland and saline-alkali land.This phenomenon showed that human activities played more important role in the north than in the south of Da'an County. |
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| Keywords: | landscape evolution land use change saline-alkali land Da'an County Northeast China |
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