中国北方农牧交错带城市扩展过程对植被净初级生产力影响研究——以呼包鄂地区为例

Abstract

Abstract: Assessing the impacts of urban expansion on the Net Primary Productivity(NPP)is essential for understanding the ecological issues caused by urbanization in the drylands in northern China. In this study,we assessed the impacts of urban expansion on NPP in Hohhot-Baotou-Ordos(HBO)region——a rapidly urbanizing area in the drylandsin northern China. Based on the land use/cover map with a resolution of 30 meters,we examined the spatiotemporal patterns of NPP of urban land in HBO duringthe period of 2009-2013,and compared them with those derived from other land cover types. The results showthat the mean NPP of urban land was 572.50 NDVI·PAR,which was 3.81% higher than the regional average. The largest NPP value of urban land,occurring in July,was 123.94 NDVI·PAR,which was 7.33% higher than the regional average. The urban expansion dominated by the conversion from grassland to urban land would increase regional NPP in HBO.

Key words: drylands in northern China, Hohhot-Baotou-Ordos(HBO)region, urban expansion, net primary productivity(NPP)

CLC Number:

Q948.12

DING Mei-hui, SUN Ze-xiang, LIU Zhi-feng, HE Chun-yang. Impacts of urban expansion on net primary productivity in the agro-pastoral ecotone in Northern China:a case of Hohhot-Baotou-Ordos region[J]., 2017, 40(3): 614-621.

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Impacts of urban expansion on net primary productivity in the agro-pastoral ecotone in Northern China:a case of Hohhot-Baotou-Ordos region

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