基于MSPA模型和电路理论的晋西北国土空间生态修复关键区域识别

doi:10.13866/j.azr.2024.09.15

Abstract

Abstract:

Ecological restoration of land space is an important measure to implement the national strategy of ecological civilization. The identification of key areas of ecological restoration is a key link to the ecological restoration of land space and is difficult to carry out scientifically. Maintaining regional ecological security is of great significance. However, at present, the research on the key region identification of ecological restoration in our country lags in practice. In this paper, based on the morphological spatial analysis (MSPA) model and the value of ecosystem services, the ecological corridor was identified and extracted by circuit theory, the key areas of ecological restoration were identified, the space-time evolution law was analyzed, and the corresponding ecological restoration strategies were provided. The results showed that from 2000 to 2020, the quantity and area of ecological source areas in Northwest Shanxi increased, and the total source areas enhanced from 1898.43 to 2026.17 km² in 20 years. The number and length of eco-corridors first elevated and then decreased, and their spatial distribution was short and dense in the south, middle, and north. In the key areas of ecological restoration, the area of ecological pinch declined from 262.89 to 194.34 km² in the past 20 years; the ecological barrier sites in Pianguan County, Pinglu District, Shenchi County, and Shuocheng District enhanced from 324.61 to 504.72 km² and then reduced to 338.86 km²; the obstacle points were generally distributed in the middle of the ecological corridor, and their distribution changed from aggregation to uniformity. The paper studies the space-time evolution characteristics of the critical ecological restoration areas and the ecological background of the study areas. It also puts forward the targeted ecological restoration strategies, namely, strengthening the management of small watersheds and areas at pinch and obstacle points, and reducing human disturbance, to provide reference for regional land space ecological restoration.

Key words: ecological restoration for territorial space, identification of key areas, spatio-temporal evolution, Northwest Shanxi

LI Kexuan, ZHANG Lei, LI Hao, ZHANG Enyue, LI Yuzhen, SONG Caiyun, LIU Geng. Identification of the key regions of spatial ecological restoration in the Northwest Shanxi based on the MSPA model and circuit theory[J].Arid Zone Research, 2024, 41(9): 1593-1604.

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生态系统服务		耕地	林地	草地	水域	未利用土地
供给服务	食物生产	0.85	0.25	0.23	0.66	0.01
	原料生产	0.40	0.58	0.34	0.37	0.03
	水资源供给	0.02	0.30	0.19	5.44	0.02
调节服务	气体调节	0.67	1.91	1.21	1.34	0.11
	气候调节	0.36	5.71	3.19	2.95	0.10
	净化环境	0.10	1.67	1.05	4.58	0.31
	水文调节	0.27	3.74	2.34	63.24	0.21
支持服务	土壤保持	1.03	2.32	1.47	1.62	0.13
	维持养分循环	0.12	0.18	0.11	0.13	0.01
	生物多样性	0.13	2.12	1.34	5.21	0.12
文化服务	美学景观	0.06	0.93	0.59	3.31	0.05

阻力因子	1级	2级	3级	4级	5级	权重
高程/m	<1100	1100~1300	1300~1500	1500~1700	>1700	0.08
坡度/（°）	0~2	2~6	6~15	15~25	>25	0.07
土地利用类型	林地、水域	草地	耕地	未利用土地	建设用地	0.23
NDVI	>0.8	0.6~0.8	0.4~0.6	0.2~0.4	<0.2	0.22
距道路距离/m	>4000	3000~4000	2000~3000	1000~2000	0~1000	0.12
距居民点距离/m	>2000	1500~2000	1000~1500	500~1000	<500	0.09
距水体距离/m	<1000	1000~2000	2000~3000	3000~4000	>4000	0.19

Identification of the key regions of spatial ecological restoration in the Northwest Shanxi based on the MSPA model and circuit theory

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