Responses and trade-offs of agricultural ecosystem functions to land use changes in typical watersheds of Sichuan, China

被引：0

作者：

Dianpeng Chen ^{[1
]}

Yong Luo ^{[2
]}

Keli Liu ^{[2
]}

Hui Yu ^{[3
]}

机构：

[1] Chengdu University of Technology,College of Earth and Planetary Sciences

[2] Chengdu University of Technology,College of Geography and Planning

[3] Chinese Academy of Sciences,Institute of Mountain Hazards and Environment

来源：

Regional Environmental Change | 2025年 / 25卷 / 3期

关键词：

Ecosystem functions; CNMM-DNDC; Food supply; Trade-offs;

D O I：

10.1007/s10113-025-02407-8

中图分类号：

学科分类号：

摘要：

Ecosystem services sustain daily human life, with functions such as food supply, water retention, carbon sequestration, and soil conservation closely intertwined with our livelihoods. However, how these services change over time and their correlations remain unclear. Previous studies on the relationship between landscape patterns and ecosystem services also tend to focus on landscape pattern indices and ecosystem service values, rarely addressing these relationships from the perspective of ecological processes and spatial relationships. This paper takes the farmland ecosystem of the Wan’an watershed located in the Yanting Purple Soil Agricultural Eco-Experimental Station of the Chinese Academy of Sciences as the case area. The crop simulation models are applied to the assessment of ecosystem services. Based on geographic-ecological processes and resource-environment effects, we used models such as CNMM-DNDC, InVEST, RUSLE, and CA-Markov to simulate ecological processes and key ecosystem services. The main findings are as follows: (1) from 2010 to 2020, overall ecosystem functions showed an upward trend. Specifically, the food supply function steadily increased, while both the water conservation and soil retention functions initially increased and then declined; (2) by constructing models linking water retention, soil conservation, and food supply services with landscape pattern changes, we predicted the total ecosystem function for the Wan’an watershed in 2025. Food supply and water conservation increased by 1.94 × 103 ± 56.89 t and 4.02 × 104 m3 compared with 2020. Soil conservation decreased by 3390.42 ± 51.32 t compared with 2020; (3) we explored the synergies and trade-offs among food supply, water retention, and soil conservation services, and found the agricultural ecosystem services in the study area are predominantly characterized by low synergy, indicating a positive development trend for the region’s farmland ecosystem. Rationally adjusting the synergistic trade-offs between ecosystem services helps achieve the sustainable development of farmland and also provides a basis for decision-making in the agricultural development of small watersheds.

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