供应链多样性保护城市免受粮食冲击
Michael Gomez1, Alfonso Mejia2, Benjamin L Ruddell3
1Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA, USA.
Nature
|July 8, 2021
概括
增加食物供应链的多样性可以提高城市对粮食冲击的抵御能力, 这项研究使用基于美国大都市地区数据的新型模型将食物冲击风险与供应链多样性联系起来.
科学领域:
- 生态经济学
- 城市弹性研究
- 粮食安全分析
背景情况:
- 全球粮食供应链面临越来越多的冲击,
- 生态理论强调生物多样性在缓冲生态系统中的作用,表明供应链多样性是粮食安全的关键.
研究的目的:
- 量化粮食供应链多样性对城市抗粮食冲击能力的影响.
- 开发一种将食物冲击风险与供应链多样性联系起来的模型.
主要方法:
- 根据美国大都市地区 (2012-2015) 的年度粮食流入数据开发了强度-持续-频率模型.
- 在干旱期间观察食物流入的实证统计分析.
- 利用香农多样性指数来衡量食品供应链的多样性.
主要成果:
- 增加食物供应链多样性使城市对轻度至中度粮食冲击的抵抗力增加了15%.
- 城市对食物冲击的抵抗力是食物供应链的农多样性的一种单调下降的功能.
- 开发的模型适用于各种危险,并且在操作上有用.
结论:
- 粮食供应链的多样性是提高城市应对粮食冲击的关键因素.
- 城市可以通过实施增加供应链多样性的政策来积极改善粮食安全.
- 这些发现为城市提供了一个切实可行的框架, 以减轻与粮食供应中断相关的风险.
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