Toward a mechanistic understanding of coupled biogeochemical cycles in human-dominated landscapes

人类活动正在深刻地改变生物地球化学循环，对提供对社会至关重要的生态系统服务产生重要影响。农业可持续营养管理战略是减少这些影响、同时支持长期粮食安全和水质的关键杠杆。然而，对于农业活动和城市化如何影响生物地球化学循环（如氮、磷和碳）之间的相互作用，进而影响生态系统服务，我们的理解相对有限。另一个管理上的挑战是，我们缺乏关于这些人类对营养循环的影响如何调节特定服务的提供的机制模型。随着全球粮食需求的增加和城市化进程的继续，缩小这些与人类主导系统相关的知识差距至关重要。我的研究项目将解决这些挑战，同时训练学生进行统计和空间分析、营养预算核算和生态系统服务建模。

Human activity is profoundly altering biogeochemical cycles, with important implications for the provision of ecosystem services that are vital to society. Sustainable nutrient management strategies in agriculture are a critical lever to reduce these impacts while supporting long-term food security and water quality. Yet, we have relatively limited understanding of how agricultural activities and urbanization affect the interaction among biogeochemical cycles (such as nitrogen, phosphorus, and carbon) that can in turn influence ecosystem services. Another management challenge is that we lack mechanistic models of how these human impacts on nutrient cycling moderate the provision of specific services. Closing these knowledge gaps related to human-dominated systems is critical as global food demand increases and urbanization continues. My research program will address these challenges while training students in statistical and spatial analysis, nutrient budget accounting, and ecosystem service modeling.