Quantifying effects of socioeconomic development on urban landscape fragmentation

doi:10.3969/j.issn.1000-2006.201807016

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (1): 154-162.doi: 10.3969/j.issn.1000-2006.201807016

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Quantifying effects of socioeconomic development on urban landscape fragmentation

CHE Tong¹(), LUO Yunjian¹^,²^,^*()

1. College of Horticulture and Plant Protection, College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China
2. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Received:2018-07-10 Revised:2019-03-25 Online:2020-02-08 Published:2020-02-02
Contact: LUO Yunjian E-mail:tongche1995@sina.com;yjluo@yzu.edu.cn

Abstract

Abstract:

【Objective】 We analyzed spatial patterns of urban landscape fragmentation by taking Yangzhou City as a case study. Here, we further quantitatively explore the effects of socioeconomic factors on landscape fragmentation.【Method】 Multi data sources (e.g., Landsat-5 TM imagery with 30 m spatial resolution, and the Statistical Yearbook of Yangzhou City) and several data analysis methods (e.g., landscape pattern analysis and the boosted regression trees machine learning technique) were employed. 【Result】 ① Arable land was the dominant land use, covering 54.9% of the total area of the city in 2010, followed by water (22.0%), built-up land (21.9%), and forestland and grassland (1.1%). As the distance from the city center increased, the degree of landscape fragmentation first increased and then decreased, whereby the turning point was at the edge of the city. ② The degree of landscape fragmentation increased with increasing level of urbanization, and reached an extremum at 35%-45% before declining gradually. ③ At the landscape level, social factors (i.e., total population and population density) generally had an inhibiting role on landscape fragmentation, while economic factors (i.e., per capita GDP, per capita revenue, primary and tertiary industries) usually promoted landscape fragmentation. In comparison to landscape level, socioeconomic factors had greater impacts at the class-level, and their relationships with class-level fragmentation indices (patch density, edge density, landscape division index and aggregation index) showed distinct differences. For example, per capita revenue promoted the division of landscape at the landscape level, but inhibited it at class level.【Conclusion】 Socioeconomic development played an important role in landscape fragmentation, not only at different levels (landscape and class levels), but also in terms of different driving roles (inhibition or promotion) of fragmentation indices. Therefore, it is necessary to consider the scale effect, impact intensity, and impact direction of socioeconomic factors in order to effectively alleviate urban landscape fragmentation.

Key words: urbanization, landscape fragmentation, spatial pattern, socioeconomic development, Yangzhou City

CLC Number:

S731.2
Q14

CHE Tong, LUO Yunjian. Quantifying effects of socioeconomic development on urban landscape fragmentation[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(1): 154-162.

Figures/Tables 6

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Table 1

Table 2

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景观格局指数 landscape indices	景观水平 landscape level		类型水平 class level
景观格局指数 landscape indices	R²	RMSE	R²	RMSE
斑块密度 patch density	0.42	1.13	0.56	0.65
边缘密度 edge density	0.36	10.58	0.39	9.28
聚合度aggregation index	0.31	1.71	0.86	1.91
分离度landscape division index	0.36	0.10	0.70	0.08

驱动因子 driving factors	景观水平 landscape level				类型水平 class level
驱动因子 driving factors	斑块密度 patch density	边缘密度 edge density	聚合度 aggreation index	分离度 landscape division index	斑块密度 patch density	边缘密度 edge density	聚合度 aggreation index	分离度 landscape division index
人口数量 population	21.8	20.0	19.9	18.0	18.7	20.2	11.8	16.2
人口密度 population density	13.9	15.5	15.9	17.1	18.4	19.2	39.2	26.0
人均GDP per capita GDP	17.6	14.9	15.4	11.1	18.8	14.8	9.2	11.9
人均财政收入 per capita fiscal revenue	14.4	14.7	14.3	15.6	12.9	16.2	8.6	14.8
第一产业占比 proportion of primary industry	14.7	16.2	16.0	15.5	16.0	12.9	21.5	19.4
第三产业占比 proportion of tertiary industry	17.7	18.7	18.5	22.7	15.1	16.8	9.5	11.6

Quantifying effects of socioeconomic development on urban landscape fragmentation

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