孙晓等：Optimizing the landscape in grain production and identifying trade-offs between ecological benefits based on production possibility frontiers: A case study of Beijing–Tianjin–Hebei region
发布时间：2025-02-24
近日，生态环境学院孙晓副教授作为通讯作者，与其他合作者的研究论文Optimizing the landscape in grain production and identifying trade-offs between ecological benefits based on production possibility frontiers: A case study of Beijing–Tianjin–Hebei region发表在国际Top期刊Journal of Environmental Management上。
生态系统服务权衡往往会涉及到多重目标平衡、人类福祉以及社会生态可持续性等问题，尤其是供给服务和调节服务之间的权衡关系长久以来受到更多关注。由于自然用地和农用地的相互侵占，导致相关重要生态系统服务丧失，粮食生产和生态效益之间出现冲突。然而，如何探索可持续的农业景观与自然生境优化格局配置，以科学管理农业用地扩张以及自然栖息地保护，确保粮食安全和生态效益尚不清晰。
鉴于此，本研究开发了一种可迁移的用于生成粮食生产与生态效益（生物多样性、碳汇和水消耗）之间的权衡的生产可能性边界方法，并设计了无约束、生态约束以及农业和生态约束等多种情景，识别了京津冀地区景观优化的关键阈值和政策安全区。研究结果表明：当达到权衡边界的帕累托最优时，粮食产量与生物多样性可增加10%-17%，粮食产量与碳汇可增加15%-48%，粮食产量与水消耗则可以改善4%-25%。目前京津冀地区的现状是粮食生态与生态指标超出了安全区的范围，并且不同权衡情景下的景观格局优化策略也有差异。当京津冀地区的耕地面积增加2.7%时，可以改善粮食和生物多样性安全；将6.8%的耕地面积转化为林地，可以促进碳汇安全；虽然将2.3%的耕地转化为草地，可以有效促进水资源安全，但在此过程中仍需要注重技术创新。本研究通过提升景观多功能性进行景观格局优化的重要性，并且可以为改善粮食生产和生态效益提供定量的景观优化关键阈值和安全边界范围。
Highlights
Landscape pattern optimization can mitigate the trade-offs between grain production and ecological benefits.
The thresholds of trade-off production possibility frontiers and the safety boundaries for optimization were identified.
Different constrained scenarios were developed to compare the effects of local ecological and agricultural policies.
The grain yield and carbon sink increased the most with 15%–48% when reaching the Pareto optimality.
Converting part of the cropland to forest or grassland is essential for carbon sink and water security.
该工作得到国家自然科学基金委、国家重点研发计划、中央公益性科研机构基础研究等项目支持。
原文信息：Qinghua Liu, Xiao Sun*, Qingxu Huang, et al. Optimizing the landscape in grain production and identifying trade-offs between ecological benefits based on production possibility frontiers: A case study of Beijing–Tianjin–Hebei region. Journal of Environmental Management, 2025, 377, 124583. https://doi.org/10.1016/j.jenvman.2025.124583