文献类型： 外文期刊
作者： Jiang, C. 1 ; Wu, Z. F. 2 ; Cheng, J. 3 ; Yu, Q. 4 ; Rao, X. Q. 6 ;
作者机构： 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Guangzhou Univ, Sch Geog Sci, Guangzhou 510006, Guangdong, Peoples R China
3.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
4.Univ Technol Sydney, Fac Sci, Sch Life Sci, Broadway, NSW 2007, Australia
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China
关键词： NPP loss;Urbanization;Urban expansion;CASA model;Pearl River Delta
期刊名称：INTERNATIONAL JOURNAL OF PLANT PRODUCTION （ 影响因子：2.017； 五年影响因子：1.85 ）
ISSN： 1735-6814
年卷期： 2015 年 9 卷 4 期
页码：
收录情况： SCI
摘要： Great changes in land use/land cover from rapid urbanization have occurred in the Pearl River Delta, China. As the primary cause of land development in the urbanization process, urban expansion has mostly occurred on land with higher NPP, significantly impacting the regional ecosystems. The primary purpose of this study was to reveal the impacts of urban expansion on the regional NPP. The land cover datasets and three types of urban lands (urban, peri-urban and non-urban areas) were obtained to quantify the urban expansion of the Pearl River Delta from 2000 to 2010. The Carnegie-Ames-Stanford-Approach (CASA) model was driven by the land cover types, NDVI data and climate data to calculate the NPP for the study area and analyze its spatial-temporal variations, as well as the impacts on NPP from urban expansion. The results showed: cropland and forest with higher NPP values and wetland were the major source of urban expansion, which generally reduced the regional NPP values, primarily by replacing vegetation with urban land. The conversion of land to urban use resulted in a reduction of 0.103TgC from 2000 to 2005 and 0.034TgC from 2005 to 2010, cropland and forest accounted for the largest proportion of the total NPP losses. In spatial distribution, the NPP losses occurring in urban and peri-urban areas accounted for 89.63% and 75.04%, respectively, which was primarily a result of the massive vegetation with high productivity being replaced with impervious surfaces during the rapid urbanization process. These results provided an indicator to understand and evaluate ecosystem changes in urban regions.
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