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, Edward
• 金额: $ 4.08万
• 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: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=722876
• 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.

蓝藻，通常称为蓝绿藻，是自然存在的微生物，可能会向淡水系统释放蓝藻毒素。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而接触这些毒素可能会导致影响动物（牲畜和宠物）和人类的症状。 这些风险范围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。蓝藻出现在世界各地平静、营养丰富的水域中，导致藻类大量繁殖。这些水华可能发生在一年中的任何时间，但在夏季和初秋更为常见，产生难闻的气味、水变色、在水面上积聚为浮渣，并释放可能对人类和水生生物有害的毒素。 人们预计，由于气候变化引起的温度升高，城市湖泊中藻华的频率和持续时间将会增加。随着蓝藻毒素发生率的增加，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，从而深入了解减少发生藻华的可能性（例如管理/减少营养负荷，考虑物理和环境因素）。 化学活动来减少水华，并利用微生物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，缺乏专门预测有害藻类成分和毒性的模型，需要更好地了解可能的控制措施的有效性。这项研究将重点关注仙女湖的案例研究应用，仙女湖是安大略省霍尔顿镇的一个 26 公顷的省级重要湿地，那里的藻类生长量很大，并且有大量的历史数据可用。考虑到感兴趣的各方、距离较近、访问相对容易以及拟议研究团队的专业知识，仙女湖是这项研究的理想选择。