Abstract
Based on the interpretation and vector processing of remote sensing images in 1985 and 2000, the spatial changes of wetland landscape patterns in Dadu River catchment in the last two decades were studied using spatial analysis method. Supported by Apack software, the indices of wetland landscape pattern were calculated, and the information entropy (IE) was also introduced to show the changes of wetland landscape information. Results showed that wetland landscape in this region was characteristic of patch-corridor-matrix configuration and dominantly consisted of natural wetlands. Landscape patterns changed a little with low fragment and showed concentrated distribution with partial scattered distribution during the period from 1985 to 2000. The values of patch density and convergence index kept stable, and the values of diversity, evenness indices and IE showed a slight decrease, while dominance and fractal dimension indices were increased. All types of wetland landscapes had higher adjacency probabilities with grassland landscape in 1985 and 2000, and there was extremely weak hydrological link and large spatial gap among river, glacier, reservoir and pond wetlands due to low adjacency matrix values. Since their cumulative contribution exceeded 81% through the PCA analysis, the agriculture activities would be the main driving force to the landscape changes during the past 15 years.
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Laibin HUANG obtained his B.S. in the Department of Metallurgic and Ecological Engineering at University of Science and Technology of Beijing in 2009, and his major is Ecology, which includes General Ecology, City Ecology, Landscape Ecology, and Industrial Ecology. Now, he is a master student in School of Environment, Beijing Normal University and majored in Environmental Science, and his research interests refer to wetland protection, restoration and management, as well as wetland biogeochemistry. During 2005 to 2012, he participated many programs, which included National College Student’s Innovation program, program sponsored by Emphasis Project Fund of National Eleven Five-Year Scientific and Technical Support Plan, and two National Basic Research Programs of China.
Junhong BAI is an associate professor in environmental science from School of Environment at Beijing Normal University. He received his Ph.D. in environmental science from the Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences in 2003. After that, he started his postdoctoral research at the Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences. His specialized areas of research include biogeochemical processes of carbon, nitrogen and phosphorous in wetland soils, wetland landscape, and assessment of heavy metal contamination in wetland soils. He has published more than 120 papers and has authored or co-authored 3 books.
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Huang, L., Bai, J., Yan, D. et al. Changes of wetland landscape patterns in Dadu River catchment from 1985 to 2000, China. Front. Earth Sci. 6, 237–249 (2012). https://doi.org/10.1007/s11707-012-0312-4
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DOI: https://doi.org/10.1007/s11707-012-0312-4