Landscape pattern evolution of typical karst plateau in Puding,Guizhou during last 40 years
Author(s): QIN Luo-yi, BAI Xiao-yong, WANG Shi-jie, ZHOU De-quan, LUO Guang-jie, ZHANG Si-yu, LI Pan-long, LI Yue, School of Geography and Environmental Sciences, Guizhou Normal University, Karst Ecosystem Observation Research Station in Puding, Chinese Academy of Sciences, State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, College of Forestry, Guizhou University
Pages: 3349-3357
Year: 2014 Issue: 12
Journal: Chinese Journal of Ecology
Keyword: land use / cover change; landscape change; driving force; Guizhou plateau; Puding County;
Abstract: Based on 1973 MSS and 1990,2002,2009 TM remote sensing images,the evolution process and driving force of landscape pattern in Puding County,a typical karst region during past 40 years were analyzed by using GIS,RS technology and landscape ecology research methods. The results showed that the main structure changes of landscape were the mutual conversion between woodland,grassland and farmland. Before 1990,about 43. 97% of the woodland and grassland transferred to the farmland; after 1990,50. 09% of the farmland transferred to the woodland and grassland. At the class level,before 1990,the farmland landscape showed a trend of increase in area and of integration in space,while the woodland decreased in area and fragmented in space; after 1990,an opposite trend was found for the woodland and farmland. At the landscape level,before 1990,fragmentation index increased,and the diversity and evenness decreased,indicating that the landscape became simplified. From 1990 to 2002,the landscape shape became complicated,and the diversity and evenness increased. After 2002,the fragmentation decreased,and the discrete and separation degree increased,leading to unstable spatial distribution. All together,in the region with extremely fragile karst ecological environment in Southwest China,ecological restoration project construction and industrial structure adjustment were the main and effective means for ecological restoration in the future.
Pages: 3349-3357
Year: 2014 Issue: 12
Journal: Chinese Journal of Ecology
Keyword: land use / cover change; landscape change; driving force; Guizhou plateau; Puding County;
Abstract: Based on 1973 MSS and 1990,2002,2009 TM remote sensing images,the evolution process and driving force of landscape pattern in Puding County,a typical karst region during past 40 years were analyzed by using GIS,RS technology and landscape ecology research methods. The results showed that the main structure changes of landscape were the mutual conversion between woodland,grassland and farmland. Before 1990,about 43. 97% of the woodland and grassland transferred to the farmland; after 1990,50. 09% of the farmland transferred to the woodland and grassland. At the class level,before 1990,the farmland landscape showed a trend of increase in area and of integration in space,while the woodland decreased in area and fragmented in space; after 1990,an opposite trend was found for the woodland and farmland. At the landscape level,before 1990,fragmentation index increased,and the diversity and evenness decreased,indicating that the landscape became simplified. From 1990 to 2002,the landscape shape became complicated,and the diversity and evenness increased. After 2002,the fragmentation decreased,and the discrete and separation degree increased,leading to unstable spatial distribution. All together,in the region with extremely fragile karst ecological environment in Southwest China,ecological restoration project construction and industrial structure adjustment were the main and effective means for ecological restoration in the future.
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