Publications

Zhang, CF; Yuan, YB; Xu, YQ; Zhang, LW; Dong, H (2021). ASSESSING THE IMPACT OF URBANIZATION ON REGIONAL GROSS PRIMARY PRODUCTIVITY IN WUHAN URBAN AGGLOMERATION ENVIRONMENT, CHINA. FRESENIUS ENVIRONMENTAL BULLETIN, 30(6), 5985-5996.

Abstract
The process of urbanization has rapidly changed the land use pattern and occupied a large amount of cropland and forest. Its influence on the global ecological environment is a hot topic of geography research. Studying the influence of urbanization process on regional gross primary productivity is essential to understand the carbon cycle of regional terrestrial ecosystem. At present, the central region of China is the fastest growing region in the process of urbanization in China. In this study, taking Wuhan Urban Agglomeration as the research area, we aim to estimate the impact of urbanization on the variation of gross primary productivity (GPP), analyze land use change combined with the MODIS GPP/NPP data products to study the change of GPP in 2004-2016 by using Landsat TM and OLI image data to obtain land use information. The land use analysis shows that the urban sprawl is the most striking land use change, embodied by the conversion of cropland to urban, the conversion and supplement of cropland from forest, and the conversion of small part of the forest land into urban directly. During 2004-2006, the mean of annual GPP of Wuhan Urban Agglomeration decreased from 1129.23 gCm(-2)year(-1) to 981.98 gCm(-2)year(-1), and the total GPP decreased by 7969.89 GgC, corresponding to a reduction of 12911.22 GgC in the absorption of CO2 within a year. Among them, the existing cropland in 2004 accounts for 69.46% of the total decline, and the forest land accounts for 12.9%. The main reason for the decline of GPP in the whole region lies in the occupation of cropland by the urban land and the conversion of forest land into cropland. The migration of non-urban population to urban areas has contributed to this decline.

DOI:

ISSN:
1018-4619