Micronutrient and pollution transfer in East African lake catchments: impacts on the food-water-energy security nexus

东非湖泊流域的微量营养素和污染转移：对粮食-水能源安全关系的影响

• 批准号: 2275068
• 金额: --
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2275068
• 关键词: Micronutrient; pollution; transfer; East; African

Subsistence farmers in Africa are often dependent on food grown within a limited area. Therefore, their health is often associated with geochemical factors that influence the soil-to-crop transfer of essential micronutrients (MN) for health (e.g. zinc). Food production and quality is compromised by soil erosion and downstream transport of sediments to waterbodies where sediment and associated nutrients/pollutants impact water security. Resources to manage soils sustainably can be limited, resulting in weathering and erosion of soil into waterways/catchments, such as Lake Victoria. Little is known about the loss of MN from weathering of soils and whether these are more prone to poor soil management (organic retention). Loss of fine soil particles may result in transfer of micronutrients or naturally occurring/anthropogenic potentially harmful elements (PHEs) into water courses/catchments with implications for ecological health. The Winam Gulf catchment of Lake Victoria is an exemplar of these processes as a regionally important source of food both from land and water.

非洲自给自足的农民往往依赖于有限区域内种植的粮食。因此，它们的健康通常与影响健康必需微量营养素（MN）（例如锌）从土壤到作物转移的地球化学因素有关。粮食生产和质量受到土壤侵蚀和沉积物向下游输送到水体的影响，而沉积物和相关营养物/污染物会影响水安全。可持续管理土壤的资源可能有限，导致土壤风化和侵蚀进入水道/流域，例如维多利亚湖。人们对土壤风化造成的微晶流失以及这些是否更容易出现土壤管理不良（有机滞留）知之甚少。土壤细颗粒的损失可能导致微量营养素或自然产生/人为的潜在有害元素（PHE）转移到水道/集水区，从而影响生态健康。维多利亚湖的威纳姆湾流域是这些过程的典范，它是该地区重要的陆地和水食物来源。