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Remote Sensing for Natural Resources    2022, Vol. 34 Issue (3) : 97-105     DOI: 10.6046/zrzyyg.2021229
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Dynamic changes in the landscape connectivity in Shenzhen City determined based on the long time series of remote sensing data
TANG Wenkui1,2(), YU Lu2(), ZHOU Weiqi1, YUE Jun2, ZHOU Zheng2
1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
2. Urban Planning and Design Institute of Shenzhen, Shenzhen 518028, China
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Abstract  

In the past 30 years, the land use in Shenzhen City has changed dramatically until it is almost saturated now. Using the morphological spatial pattern analysis (MSPA) and the graph theory, this study quantitatively analyzed the landscape connectivity of ecological land in Shenzhen based on ten phases of remote sensing images for land cover or use from 1988 to 2015. The results show that the cultivated land was the main land source in various periods of Shenzhen’s rapid urbanization, while the proportion of forest land used for urban development had risen since 2005. For Shenzhen’s landscape connectivity from 1988 to 2015, the equivalent connected area (ECA) of the ecological land decreased by 1 175.4 km2, and the degree of network connectivity (DOC) decreased by 43.51%. Since the delineation of Shenzhen’s basic ecological control boundary in 2005, the pace of urban habitat degradation has slowed down but the ECA of the ecological land had still been gradually eroded at a rate of 11.9 km2 per year. The analysis of the importance of ecological patches shows that areas like the Yangtai Mountain and Tanglang Mountain are key ecological nodes for landscape connectivity and should be protected with greater efforts.
Keywords landscape connectivity      graph theory      morphological spatial pattern analysis (MSPA)      remote sensing image of land cover or use      Shenzhen City     
ZTFLH:  TP79  
Corresponding Authors: YU Lu     E-mail: tangwk@upr.cn;yul@upr.cn
Issue Date: 21 September 2022
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Wenkui TANG
Lu YU
Weiqi ZHOU
Jun YUE
Zheng ZHOU
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Wenkui TANG,Lu YU,Weiqi ZHOU, et al. Dynamic changes in the landscape connectivity in Shenzhen City determined based on the long time series of remote sensing data[J]. Remote Sensing for Natural Resources, 2022, 34(3): 97-105.
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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2021229     OR     https://www.gtzyyg.com/EN/Y2022/V34/I3/97
Fig.1  Shenzhen administrative diagram and elevation distribution
年份 解译精度
总精度/% Kappa
1988年 89.22 0.876
1990年 89.23 0.898
1993年 90.55 0.891
1996年 91.31 0.901
2001年 88.78 0.876
2005年 89.65 0.893
2008年 90.79 0.889
2011年 88.27 0.872
2013年 90.98 0.896
2015年 91.63 0.912
平均值 90.04 0.890
Tab.1  Classification accuracy of land use in study area from 1988 to 2015
Fig.2  Land use change in Shenzhen City from 1988 to 2015
阶段 来自林地 来自草地 来自耕地 来自水体
1988—1991年 35.70 0.24 64.07 0.00
1991—1993年 12.27 2.33 70.86 14.53
1993—1996年 38.00 0.09 54.46 7.46
1996—2001年 23.54 2.38 64.28 9.80
2001—2005年 12.53 5.05 74.08 8.33
2005—2008年 37.71 8.18 38.22 15.89
2008—2011年 41.37 9.68 42.38 6.57
2011—2013年 40.66 3.65 42.51 13.18
2013—2015年 29.91 10.67 49.85 9.57
Tab.2  Area percentages of other land-use types transforming into built-up areas in each period(%)
Fig.3  Time series changes of the area and number of MSPA types in Shenzhen City from 1988 to 2015
Fig.4  Distribution of ecological land components and the basic ecological controlling line in Shenzhen City
年份 生态用地 林地 耕地 水体
组分数/个 ECA/km2 DOC/% ECA/km2 DOC/% ECA/km2 DOC/% ECA/km2 DOC/%
1988年 93 1 589.61 98.90 395.75 62.06 150.57 95.78 63.71 56.88
1991年 139 1 457.78 98.78 404.14 60.42 53.31 60.74 76.90 66.56
1993年 201 1 300.82 97.78 397.03 60.42 24.39 39.31 65.80 62.63
1996年 205 1 018.23 87.34 374.26 59.06 19.05 36.56 43.02 49.90
2001年 238 897.26 88.17 266.39 47.60 9.33 32.21 33.74 46.86
2005年 390 533.52 58.33 348.38 62.88 2.11 24.91 23.63 43.85
2008年 412 545.15 61.30 341.02 60.75 1.42 22.26 15.30 32.50
2011年 358 463.65 52.60 260.75 47.01 2.78 32.18 16.41 33.95
2013年 585 348.57 49.58 240.83 48.77 1.14 24.93 13.81 34.84
2015年 449 414.21 55.39 248.71 49.77 1.07 20.98 14.99 38.02
Tab.3  Dynamic of ecological land connectivity in Shenzhen City from 1988 to 2015
Fig.5  Evaluation of the connectivity importance of ecological patches in Shenzhen City
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