As one of the fundamental elements in urban area, the scarcity and importance of green space are becoming more and more prominent along with the urbanization. This paper firstly quantified the change and the intensity of urban green space using spatial data acquired from Landsat TM images from 1979 to 2014. Secondly, the spatiotemporal patterns of green space fragmentation were quantified at landscape gradients from the center to the periphery of the city and at the administrative district level. The results show that the city has expanded from central area to outskirts, which results in the increasing landscape fragmentation of urban green space. The green space has not been observed great change over time, while slight variations occurred in different time periods, i.e., ascending from 1979 to 1990 (2.3%) and from 2000 to 2005 (5.3%) and descending from 1990 to 2000 (-2.7%). Fragmentation of green space and its periodic difference of decrease (1990-2000) -increase (2000-2005) -decrease (2014-2005) are widely observed in spherical gradient of landscapes from central to peripheral area, as well as in the districts of Panyu, Baiyun and Huadu which are all adjacent to the city center. All these characteristics indicate the unequal attentions paid to the economic development and green space. The latter, however, is worthy of great emphasis and optimization for the sustainable development of the city in the future. Conclusions are helpful to understand the characteristics of the evolution of regional ecological environment, enrich research case and theory of urban green space, and also provide information for urban planning and spatial structure optimization of Guangzhou in the future.
CHEN Kang-lin, GONG Jian-zhou, LIU Yan-sui, CHEN Xiao-yue
. The Spatial-temporal Differentiation of Green Space and Its Fragmentation during the Past Thirty-five Years in Guangzhou[J]. JOURNAL OF NATURAL RESOURCES, 2016
, 31(7)
: 1100
-1113
.
DOI: 10.11849/zrzyxb.20150869
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