Blue-green algae mitigation strategies for urban lakes

城市湖泊蓝绿藻缓解策略

• 批准号: 566271-2021
• 负责人: McBean, EdwardEA
• 金额: $ 4.22万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753153
• 关键词: Blue; green; algae; mitigation; strategies

Cyanobacteria, commonly known as blue-green algae, are naturally occurring microscopic organisms that may release cyanotoxins into freshwater systems. These toxins pose a serious public health risk as exposure through skin contact, ingestion of lake water, or contaminated drinking water or food may cause symptoms impacting both animals (livestock and pets) and humans. These risks range from minor irritation to more serious illness and, in worst case scenarios, can be fatal.Cyanobacteria occur worldwide, in calm, nutrient-rich waters, allowing algal blooms. These blooms may occur at any time of year but are more common during summer and early fall, creating bad odors, water discoloration, accumulate as a scum on the surface of the water, and releasing toxins that may be harmful to humans and aquatic biota. The expectations are that blooms will increase in frequency and duration in urban lakes due to warming temperatures associated with climate change.With the increasing incidence of cyanotoxins, interest is focusing on understanding the pathways of factors which contribute to formation of cyanotoxins and ultimately, opportunities to manage urban lakes and hence insights to decrease the potential for algal blooms to occur (e.g. manage/decrease nutrient loads, consider physical and chemical activities to reduce the blooms, and develop scientific knowledge using modern techniques such as microbial source tracking, and create tools to assess their magnitude and potential). Currently, models to specifically predict harmful algal composition and toxicity are lacking and improved knowledge of the effectiveness of possible control measures are needed.This research will focus on a case study application to Fairy Lake, a 26 ha Provincially Significant Wetland in the Town of Halton, Ontario where the algal growths are substantial and a considerable history of data are available. Fairy Lake is ideal for this research, given the interested parties, the proximity allowing relatively easy access, and the expertise within the proposed research team.

蓝细菌，通常被称为蓝绿藻，是自然发生的微生物，可能会释放蓝藻毒素到淡水系统。这些毒素构成严重的公共卫生风险，因为通过皮肤接触、摄入湖水或受污染的饮用水或食物接触可能会导致影响动物（牲畜和宠物）和人类的症状。 这些风险从轻微的刺激到更严重的疾病，在最坏的情况下，可能是致命的。蓝藻发生在世界各地，在平静，营养丰富的沃茨，允许藻华。这些水华可能在一年中的任何时候发生，但在夏季和初秋更常见，产生难闻的气味，水变色，在水面上积累为浮渣，并释放可能对人类和水生生物有害的毒素。 由于气候变化引起的温度升高，城市湖泊水华的发生频率和持续时间将增加。随着蓝藻毒素的发生率增加，人们的兴趣集中在了解导致蓝藻毒素形成的因素的途径，并最终了解管理城市湖泊的机会，从而了解减少藻类水华发生的可能性（例如，管理/减少营养负荷，考虑物理和化学活动以减少水华，利用微生物来源追踪等现代技术发展科学知识，并创建评估其规模和潜力的工具）。目前，专门预测有害藻类的组成和毒性的模型是缺乏和改进的知识可能的控制措施的有效性是needed.This研究将集中在仙女湖，一个26公顷的省级重要的湿地在镇的Halton，安大略的藻类生长是大量的和相当历史的数据是可用的案例研究应用。仙女湖是这项研究的理想选择，考虑到感兴趣的各方，附近允许相对容易的访问，以及拟议研究团队的专业知识。