Spatial and temporal evolution and distribution pattern of China’s relocation land converted to ecological land

doi:10.12302/j.issn.1000-2006.202202007

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (6): 263-271.doi: 10.12302/j.issn.1000-2006.202202007

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Spatial and temporal evolution and distribution pattern of China’s relocation land converted to ecological land

ZHANG Guilian(), YI Yang, ZHANG Lang()

Shanghai Academy of Landscape Architecture Science and Planning,Key Laboratory of National Forestry and Grassland Administration on Ecological Landscaping of Challenging Urban Sites, National Innovation Alliance of National Forestry and Grassland Administration on Afforestation and Landscaping of Challenging Urban Sites, Shanghai Engineering Research Center of Landscaping on Challenging Urban Sites, Shanghai 200232, China

Received:2022-02-13 Revised:2022-06-15 Online:2023-11-30 Published:2023-11-23

Abstract

Abstract:

【Objective】 The distribution and change in relocated areas are signs and footprints of human activities, reflecting human disturbance to the natural ecological environment. This study systematically examined the temporal and spatial evolutionary characteristics of the relocation area. The data provide a theoretical basis for the improvement of ecological space quality and function. 【Method】Based on GlobeLand30 surface coverage data, superposition, spatial autocorrelation, and directional distribution analyses, and a landscape pattern index were used to study the change in quantity and spatial distribution characteristics of relocation land that was changed to ecological land in prefecture-level administrative regions of China in the past 20 years. 【Result】Relocation areas in China were mainly concentrated in central China, south China, and northeast China. Their spatial distribution displayed a significant autocorrelation. The hot and cold spots in the relocation area exhibited obvious directionality. The hotspot area gradually moved northeast and the cold spot area gradually moved north. There were four types of local spatial autocorrelations in the relocation area, including High-High (HH), Low-Low (LL), Low-High (LH), and High-Low (HL) aggregations. HH and LL were the main types, HH and LL showed a continuous trend, LH was scattered around HH, and HL was less common. The proportion of lanscape area are occupied by patches (PLAND) in the relocated area increased and the average area(MPS) gradually decreased, indicating that the relocated area gradually increased in the form of small patches. 【Conclusion】This study quantified the area and proportion of relocation area in prefecture-level administrative regions of China. Most of the relocation areas were located in economically developed cities, such as the central and eastern regions and southern regions. This study provides data that will support urban planning and development.

Key words: relocation of construction land, spatial pattern, space-temporal change, ecological land, GlobeLand30

CLC Number:

ZHANG Guilian, YI Yang, ZHANG Lang. Spatial and temporal evolution and distribution pattern of China’s relocation land converted to ecological land[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(6): 263-271.

Figures/Tables 9

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年份 year	Moran’s I	期望值 expected value	Z	P
2000—2010	0.595	-0.003	43.490	<0.001
2010—2020	0.778	-0.003	57.374	<0.001

区域 region	年份 year	周长/km perimeter	面积/km² area	中心点X center point X	中心点Y center point Y	X轴长度 X-axis length	Y轴长度 Y-axis length	方向角度/(°) direction angle
热点 hot spots	2000—2010	33.68	80.28	116.70	35.56	3.81	6.71	37.16
	2010—2020	32.91	82.34	117.54	34.85	4.30	6.10	31.93
冷点 cold spots	2000—2010	52.53	211.50	110.93	29.76	7.00	9.62	61.54
	2010—2020	54.13	224.03	117.54	34.85	7.17	9.95	60.97

年份 year	类型 type	P_LAND/ %	I_LP/%	I_LS	P_AFRAC	I_cohesion/ %	S_MP/ km²
	HH	8.93	0.03	652.07	1.42	52.47	17.10
2000—2010	LL	2.54	0.02	140.90	1.41	49.75	16.60
	LH	3.85	0.08	52.12	1.37	52.61	19.60
2010—2020	HH	12.50	0.01	632.80	1.43	54.12	16.60
	LL	10.87	0.09	90.09	1.43	46.88	15.70
	LH	4.60	0.30	33.43	1.37	58.43	18.30
	HL	11.92	0.42	17.58	1.43	77.82	41.80

Spatial and temporal evolution and distribution pattern of China’s relocation land converted to ecological land

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