Degradation and destabilization of lake ecosystems by organic and inorganic nitrogen: Advancing a new paradigm for eutrophication

有机和无机氮造成的湖泊生态系统的退化和不稳定：推进富营养化的新范式

• 批准号: 155612-2012
• 负责人: Leavitt, Peter
• 金额: $ 2.4万
• 依托单位: University of Regina
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507011
• 关键词: Degradation; destabilization; lake; ecosystems; organic

We believe that increases in agricultural fertilization needed to feed 3 billion more people by 2050 will saturate soils with phosphorus (P) and create conditions in which subsequent influx of nitrogen (N) regulates water quality in developed regions. However, unlike during the Green Revolution, future N fertilization will be carried out with urea. Rarely used prior to 1960, urea now accounts for >50% of global N fertilizer, is ubiquitous in lakes worldwide, and has detrimental but incompletely understood effects on aquatic ecosystems. Given that ~1 billion people lack clean water, we seek to develop a predictive understanding of the consequences of these global changes for humans and freshwaters.

我们认为，到2050年，为养活30亿多人口而增加农业施肥，将使土壤中的磷（P）饱和，并创造条件，使随后流入的氮（N）调节发达地区的水质。 然而，与绿色革命期间不同的是，未来的氮肥将与尿素一起进行。 尿素在1960年之前很少使用，现在占全球氮肥的50%以上，在世界各地的湖泊中无处不在，对水生生态系统具有有害但尚未完全了解的影响。 鉴于约10亿人缺乏清洁水，我们寻求对这些全球变化对人类和淡水的影响进行预测性了解。