陕北黄土高原景观格局对生态系统服务权衡关系的影响
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国家自然科学基金项目(42171256,41971271)


Impact of landscape pattern on ecosystem service trade-offs in the Loess Plateau of Northern Shaanxi
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    摘要:

    揭示景观格局对生态系统服务权衡关系的作用机理对于开展多种ES的可持续管理具有重要意义。在评估陕北黄土高原2000-2020年粮食供给、水源涵养、土壤保持、生境质量和景观美学等5种生态系统服务的基础上,利用相关系数和均方根误差测度其权衡强度,结合R指数模型、变异划分法定量表达景观组分和景观配置对生态系统服务权衡关系的影响差异。结果表明:1)2000-2020年陕北黄土高原5种生态系统服务整体呈上升趋势,空间上粮食供给北高南低,水源涵养、土壤保持、生境质量和景观美学则为南高北低的分布格局;2)粮食供给与其他4种服务为权衡关系,而水源涵养、土壤保持、生境质量和景观美学之间呈协同关系;3)斑块丰富度对各组权衡关系具有正向影响,而斑块面积和景观百分比则具有负向影响;4)景观组分对各组权衡关系的单独贡献度高于景观配置,多数情况下,权衡关系更多由组分和配置的联合作用主导。研究从景观管理角度为改善陕北黄土高原生态系统服务间的权衡关系、提升ES的潜在供给能力提供了科学依据。

    Abstract:

    Revealing the mechanism of landscape pattern on ecosystem service trade-offs is of great significance for the sustainable management of multiple ecosystem services. The Loess Plateau of Northern Shaanxi is arid with little rainfall, low vegetation cover, fragile ecological environment, and serious water and soil loss. Since the Green for Grain Project, the land use pattern and structure have changed significantly, while prompting changes in ecosystem services, which provides conditions for exploring the relationship between landscape pattern and ecosystem service interactions. Based on the evaluation of the temporal and spatial patterns of 5 ecosystem services in the Loess Plateau of Northern Shaanxi from 2000 to 2020, including grain provision, water conservation, soil conservation, habitat quality and landscape aesthetics, the correlation coefficient and root mean square error were used to measure the trade-off intensity. The difference in the impacts of landscape composition and landscape configuration on the ecosystem service trade-offs were quantified by the R-index model and variation partitioning method. The results showed that:1) from 2000 to 2020, 5 ecosystem services in the Loess Plateau of Northern Shaanxi showed an overall upward trend, with grain provision higher in the north and lower in the south, water conservation, soil conservation, habitat quality and landscape aesthetics higher in the south and lower in the north. 2) The interrelationships among the five ecosystem services were mainly expressed as an overall decreasing trend in the intensity of synergy between water conservation, soil conservation, habitat quality and landscape aesthetics, and an increasing trend in the intensity of trade-offs between grain provision and water conservation, soil conservation, habitat quality and landscape aesthetics. 3) Grain provision-water conservation, grain provision-soil conservation, grain provision-habitat quality, and grain provision-landscape aesthetics were significantly more influenced by the landscape composition indices than the landscape configuration indices, with a strong positive influence of patch richness and a strong negative influence of patch area and percentage of landscape. 4) The individual contribution of landscape composition to each trade-off was higher than that of landscape configuration, in most cases, trade-off intensity was dominated by the joint action of composition and configuration. Among them, the landscape indices explained the grain provision-habitat quality to the greatest extent and the grain provision-water conservation to the least extent. From the perspective of landscape management, the study provides a scientific basis for optimizing the trade-offs between ecosystem services and enhancing the potential supply capacity of ecosystem services on the Loess Plateau of Northern Shaanxi.

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石金鑫,梁小英,李辉蔷,魏峥.陕北黄土高原景观格局对生态系统服务权衡关系的影响.生态学报,2023,43(21):8958~8972

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