Journal of Guangxi Normal University(Natural Science Edition) ›› 2026, Vol. 44 ›› Issue (1): 215-226.doi: 10.16088/j.issn.1001-6600.2025021302

• Ecology and Environmental Science Research • Previous Articles     Next Articles

Ecosystem Service Flow Based on Breakpoint-Field Strength Model ——Take the Pinglu Canal Economic Belt as an Example

XIE Ling1,2,3*, HUANG Yuhang1, TAN Minhui2, CHEN Zhantu1,2*   

  1. 1. Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions (Guangxi Normal University), Guilin Guangxi 541006, China;
    2. College of Environment and Resources, Guangxi Normal University, Guilin Guangxi 541006, China;
    3. Guangxi Canal Research Institute (Guangxi Normal University), Guilin Guangxi 541004, China
  • Received:2025-02-13 Revised:2025-04-10 Online:2026-01-05 Published:2026-01-26

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Abstract: Ecosystem service flow is related to the healthy development of regional natural ecosystems and human well-being. From the perspective of ecosystem service supply and demand, studying ecosystem service flow in the Pinglu Canal Economic Belt is the basis for finding the construction of the ecological canal and the high-quality development of the economic belt. In this paper, the potential supply of ecosystem services is estimated by an equivalent factor, and the demand index of ecosystem services is constructed to calculate the demand for ecosystem services based on population density and average land GDP, so as to determine the supply and demand ratio of ecosystem services in Pinglu Canal Economic Belt in 2000, 2010 and 2020. The breakpoint-field strength model was used to quantify the flow and intensity of ecosystem service flows. The results show that: 1) During the past 20 years, the supply value of ecosystem services in the study area had little change (increasing from 267.6 billion yuan in 2000 to 275.3 billion yuan in 2020) and is in a spatial stable state, with the lowest value being 200 million yuan in Haicheng District in 2000 and the highest value being 22.5 billion yuan in Guiping in 2020. The districts under the jurisdiction of Nanning are the agglomeration areas with a strong demand for ecosystem services. 2) During the study period, the demand for ecosystem services increased continuously, from 40 665 people · yuan /km2 in 2000 to 57 682 people · yuan /km2 in 2020. The demand for ecosystem services formed three high-value clusters in the districts under the jurisdiction of Nanning, Guigang and Beihai, with the supply-demand ratio above -1 for most of them. 3) During the study period, the ecosystem flow intensity of the Pinglu Canal Economic Belt generally increased to a stable trend, and the ecosystem service flow increased from 19.813 billion yuan in 2000 to 21.4 billion yuan in 2010, and slightly decreased to 21.16 billion yuan in 2020. Guiping of Guigang is an important ecosystem service supply area. In 2000,2010 and 2020, the ecosystem service flows exported by Guiping are respectively, and the situation of ecosystem supply/deficit in each region is becoming increasingly significant.

Key words: ecosystem service flow, breaking point model, field strength model, Pinglu Canal Economic Belt

CLC Number:  X87;X82
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