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Ecological Risk Assessment of Land Use Change in the Poyang Lake Eco-economic Zone, China
Institute of Poyang Lake Eco-economics, Jiangxi University of Finance and Economics, Nanchang 330013, China
Research Center for Agricultural Ecology of Poyang Lake Watershed, Jiangxi Agriculture University, Nanchang 330045, China
* Author to whom correspondence should be addressed.
Received: 23 August 2012; in revised form: 17 December 2012 / Accepted: 5 January 2013 / Published: 14 January 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.
Keywords: land use change; ecological risk assessment; land ecological management; landscape pattern; spatial statistics; Poyang Lake
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MDPI and ACS Style
Xie, H.; Wang, P.; Huang, H. Ecological Risk Assessment of Land Use Change in the Poyang Lake Eco-economic Zone, China. Int. J. Environ. Res. Public Health 2013, 10, 328-346.
Xie H, Wang P, Huang H. Ecological Risk Assessment of Land Use Change in the Poyang Lake Eco-economic Zone, China. International Journal of Environmental Research and Public Health. 2013; 10(1):328-346.
Xie, Hualin; Wang, Peng; Huang, Hongsheng. 2013. "Ecological Risk Assessment of Land Use Change in the Poyang Lake Eco-economic Zone, China." Int. J. Environ. Res. Public Health 10, no. 1: 328-346.