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Ecological Risk Assessment of Land Use Change in the Poyang Lake Eco-economic Zone, China
- Source :
- International Journal of Environmental Research and Public Health; Volume 10; Issue 1; Pages: 328-346, International Journal of Environmental Research and Public Health, Vol 10, Iss 1, Pp 328-346 (2013), International Journal of Environmental Research and Public Health
- Publication Year :
- 2013
- Publisher :
- MDPI AG, 2013.
-
Abstract
- Land use/land cover change has been attracting increasing attention in the field of global environmental change research because of its role in the social and ecological environment. To explore the ecological risk characteristics of land use change in the Poyang Lake Eco-economic Zone of China, an eco-risk index was established in this study by the combination of a landscape disturbance index with a landscape fragmentation index. Spatial distribution and gradient difference of land use eco-risk are analyzed by using the methods of spatial autocorrelation and semivariance. Results show that ecological risk in the study area has a positive correlation, and there is a decreasing trend with the increase of grain size both in 1995 and 2005. Because the area of high eco-risk value increased from 1995 to 2005, eco-environment quality declined slightly in the study area. There are distinct spatial changes in the concentrated areas with high land use eco-risk values from 1995 to 2005. The step length of spatial separation of land use eco-risk is comparatively long — 58 km in 1995 and 11 km in 2005 — respectively. There are still nonstructural factors affecting the quality of the regional ecological environment at some small-scales. Our research results can provide some useful information for land eco-management, eco-environmental harnessing and restoration. In the future, some measures should be put forward in the regions with high eco-risk value, which include strengthening land use management, avoiding unreasonable types of land use and reducing the degree of fragmentation and separation.
- Subjects :
- land use change
China
Conservation of Natural Resources
Environmental change
land ecological management
Health, Toxicology and Mutagenesis
ecological risk assessment
lcsh:Medicine
Land cover
Environment
Risk Assessment
Article
Poyang Lake
spatial statistics
Land use, land-use change and forestry
landscape pattern
Spatial analysis
Ecology
Land use
business.industry
lcsh:R
Semivariance
Environmental resource management
Public Health, Environmental and Occupational Health
Models, Theoretical
Disturbance (ecology)
Environmental science
Land development
business
Subjects
Details
- ISSN :
- 16604601
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- International Journal of Environmental Research and Public Health
- Accession number :
- edsair.doi.dedup.....5cfdb9b14a8e51759fe24c19b8926be0