Sun Yongxiu, Liu Shiliang, Dong Yuhong, An Yi, Shi Fangning, Dong Shikui, Liu Guohua
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
Sci Total Environ. 2019 Sep 1;681:211-225. doi: 10.1016/j.scitotenv.2019.05.136. Epub 2019 May 11.
Ecosystem service (ES) supply and demand are affected by changes in land use and the supply of specific ecosystem services for human consumption, respectively. Future spatio-temporal dynamics and their coupling relations with land use in China have not been well analysed. In this study, based on future land use scenarios of Li's database, ES supply, demand and balance (supply minus demand) were revealed utilizing land use and land cover (LULC) matrix model in China in 2010, 2050 and 2100. The results showed that ES supply, demand and balance had great spatial and temporal variations under different scenarios at national and provincial scales. Higher population and higher urban expansion scenarios will lead to a significant decreasing in the balance values of different categories and total ESs in most provinces. The ecological sensitivity index was calculated to indicate the impact of land use intensity on ecosystem services. The results showed that the sensitivity levels in approximately 90% of provinces were low for all the scenarios, as only Anhui, Zhejiang, Jiangxi and Liaoning in 2050 and Gansu in 2100 were extremely sensitive to changes in supply, while only provinces in the central-eastern regions were sensitive with obvious differences from the demand. The coupling coordination analysis between land use intensity and ES balance was applied to identify the provinces with low-level coordination in land use and ES management. The results showed that the coordination change in most provinces remained stable under four scenarios. However, some provinces displayed an improving trend from low to moderate coordination or from moderate to high coordination and a degrading trend from moderate to low coordination or from high to moderate coordination from 2010 to 2100. This study contributes to exploring the effect of land use on ecosystem service evolution, thereby providing credible guidance for future land and ES management.
生态系统服务(ES)的供给和需求分别受到土地利用变化以及人类消费的特定生态系统服务供给的影响。中国未来的时空动态及其与土地利用的耦合关系尚未得到充分分析。在本研究中,基于李数据库的未来土地利用情景,利用2010年、2050年和2100年中国的土地利用和土地覆盖(LULC)矩阵模型揭示了生态系统服务的供给、需求和平衡(供给减去需求)情况。结果表明,在国家和省级尺度的不同情景下,生态系统服务的供给、需求和平衡具有很大的时空变化。更高的人口和更高的城市扩张情景将导致大多数省份不同类别和生态系统服务总量的平衡值显著下降。计算了生态敏感性指数以表明土地利用强度对生态系统服务的影响。结果表明,在所有情景下,约90%省份的敏感性水平较低,仅2050年的安徽、浙江、江西和辽宁以及2100年的甘肃对供给变化极为敏感,而只有中东部地区的省份对需求敏感且与需求有明显差异。应用土地利用强度与生态系统服务平衡之间的耦合协调分析来识别土地利用和生态系统服务管理协调水平较低的省份。结果表明,在四种情景下,大多数省份的协调变化保持稳定。然而,从2010年到2100年,一些省份呈现出从低到中协调或从中到高协调改善的趋势,以及从中到低协调或从高到中协调退化的趋势。本研究有助于探索土地利用对生态系统服务演变的影响,从而为未来的土地和生态系统服务管理提供可靠指导。
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