Optimizing the ecosystem service flow of grain provision across metacoupling systems will improve transmission efficiency

IF 4 2区地球科学 Q1 GEOGRAPHY

Applied Geography Pub Date : 2024-09-19 DOI:10.1016/j.apgeog.2024.103420

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引用次数: 0

Abstract

Ecosystem service (ES) flow can address mismatches between the supply and demand of ESs. Nevertheless, how to improve ES flow considering spatial flow information and interactions among different flow systems is a research gap. Taking the Beijing-Tianjin-Hebei (BTH) urban agglomeration region of China as an example, this study combined both system and network perspectives to analyze the ES flow of grain provision before and after optimization. Metacoupling system analysis was adopted to assess intra-regional and extra-regional flow. Linear programming was used to calculate the optimal distance cost flow solution with constraints. A network model was finally applied to build and analyze flow and transmission networks. In 2020, BTH participated in nearly 10% of the national flow, among which 57% was extra-regional flow. After optimization, the proportion of extra-regional flow decreased to 36%, all of which was inflow from the nearest provinces, while intra-regional flow increased by 35%. The optimized flow reduced distance costs by 143% and decreased network complexity. Core transmission nodes with both high degree and betweenness centrality played prominent connection roles in the process of flow. Strengthening regional connections and simultaneously effectively managing core transmission nodes are of great significance for improving flow efficiency and ensuring food provision.

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优化跨元耦合系统的粮食供给生态系统服务流将提高传输效率

生态系统服务流（ES）可以解决生态系统服务供需不匹配的问题。然而，考虑到空间流动信息和不同流动系统之间的相互作用，如何改善生态系统服务流动仍是一个研究空白。本研究以中国京津冀（BTH）城市群区域为例，结合系统和网络两个视角，分析了优化前后的粮食供应服务流。采用元耦合系统分析评估区域内和区域外流量。采用线性规划方法计算带约束条件的最优距离成本流量方案。最后应用网络模型来构建和分析流量和传输网络。2020 年，BTH 参与了全国近 10%的流量，其中 57%为区域外流量。优化后，区域外流量比例下降到 36%，全部来自最近的省份，而区域内流量增加了 35%。优化后的流量减少了 143% 的距离成本，降低了网络的复杂性。在流动过程中，度数中心性和间度中心性均较高的核心传输节点发挥了突出的连接作用。加强区域连接，同时有效管理核心传输节点，对于提高流动效率、保障粮食供应具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Geography GEOGRAPHY-

CiteScore

8.00

自引率

2.00%

发文量

134

期刊介绍： Applied Geography is a journal devoted to the publication of research which utilizes geographic approaches (human, physical, nature-society and GIScience) to resolve human problems that have a spatial dimension. These problems may be related to the assessment, management and allocation of the world physical and/or human resources. The underlying rationale of the journal is that only through a clear understanding of the relevant societal, physical, and coupled natural-humans systems can we resolve such problems. Papers are invited on any theme involving the application of geographical theory and methodology in the resolution of human problems.