Various environmental and socioeconomic issues have been attributed to land-use changes, and therefore, the underlying mechanisms merit investigation and quantification. This study assesses a comprehensive series of land-use conversions that were implemented over a recent 12-year period in the province of Alberta, Canada, where rapid economic and population growth has occurred. Spatial autocorrelation models are applied to identify the comprehensive effects of environmental and socioeconomic factors in each conversion case. The empirical results show that the impacts of key environmental and socioeconomic factors varied in intensity depending on the type of land-use conversion involved. Overall, land suitability for agricultural uses, road density, elevation, and population growth were found to be significant predictors of land-use changes. High land suitability, low elevation, and moderate road density were associated with land conversion for agricultural purposes.
KEYWORD: DPSIR model; Reed; Index system; Qilihai wetland ABSTRACT: Vegetation is the core protection object in nature reserve and establishing index sytem of the growth status of vegetation and analyzing the influencing factors are the basis of vegetation protection in nature reserve. Based on DPSIR model and the principles of science, comprehensiveness, difference, early warning and guidance, the selection of index from perspectives of driving forces, pressure,state,impact and response is put forward. The establishment of index system of the growth of reed for the core region in Qilihai wetland provide methods for evaluation of the growth and influencing factors of reed, and service to the reed restoration for the core region in Qilihai wetland.
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