Marked blue discoloration of late winter ice and water due to autumn blooms of cyanobacteria

IF 1.1 4区环境科学与生态学 Q4 LIMNOLOGY

Lake and Reservoir Management Pub Date : 2021-11-17 DOI:10.1080/10402381.2021.1992544

H. Haig, A. Chegoonian, J. Davies, D. Bateson, P. Leavitt

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引用次数: 8

Abstract

Abstract Haig HA, Chegoonian AM, Davies J-M, Bateson D, Leavitt PR. 2021. Marked blue discoloration of late winter ice and water due to autumn blooms of cyanobacteria. Lake Reserv Manage. 38:1–15. Continued eutrophication of inland waters by nutrient pollution can combine with unprecedented atmospheric and lake warming to create emergent environmental surprises. Here we report the first known occurrence of marked blue discoloration of ice and water in highly eutrophic prairie lakes during late winter 2021. Intense blue staining was reported first to governmental agencies by ice fishers in early March 2021, then communicated widely through social media, resulting in First Nations and public concern over potential septic field release, toxic spills, urban pollution, and agricultural mismanagement. Analysis of water from stained and reference sites using ultraviolet (UV)–visible spectrophotometry and high-performance liquid chromatography demonstrated that the blue color arose from high concentrations (∼14 mg/L) of the cyanobacterial pigment C-phycocyanin that was released after an unexpected bloom of Aphanizomenon flos-aquae in late October 2020 was frozen into littoral ice. Remote sensing using the Sentinel 3 A/B OLCI and Sentinel 2 A/B MSI satellite platforms suggested that blue staining encompassed 0.68 ± 0.24 km2 (4.25 ± 1.5% of lake surface area), persisted over 4 weeks, and was located within 50 m of the lakeshore in regions where fall blooms of cyanobacteria had been particularly dense. Although toxin levels were low (∼0.2 μg microcystin/L), high concentrations of C-phycocyanin raised public concern over eutrophication, pollution, and climate change, and resulted in rapid governmental and academic response. Given that climate change and nutrient pollution are increasing the magnitude and duration of cyanobacterial blooms, blue staining of lake ice may become widespread in eutrophic lakes subject to ice cover.

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由于秋天蓝藻的大量繁殖，冬末的冰和水出现明显的蓝色变色

摘要Haig HA，Chegoonian AM，Davies J-M，Bateson D，莱维特PR.2021。由于秋季蓝藻的大量繁殖，深冬的冰和水出现明显的蓝色变色。湖泊保护区管理。38:1-15。营养污染导致内陆水域持续富营养化，再加上前所未有的大气和湖泊变暖，可能会带来突发的环境惊喜。在这里，我们报告了2021年深冬期间，高度富营养化的草原湖泊中首次出现冰和水的明显蓝色变色。2021年3月初，捕冰者首先向政府机构报告了强烈的蓝色污染，然后通过社交媒体广泛传播，导致原住民和公众对潜在的化粪池释放、有毒物质泄漏、城市污染和农业管理不善感到担忧。使用紫外（UV）-可见分光光度法和高效液相色谱法对染色和参考部位的水进行分析，结果表明蓝色是由高浓度（~14 mg/L）的蓝藻色素C-藻蓝蛋白，该色素是在2020年10月下旬Aphanizeomenon flos aquae意外开花后释放的。使用Sentinel 3进行遥感 A/B OLCI和Sentinel 2 A/B MSI卫星平台表明蓝色染色包含0.68 ± 0.24 平方公里（4.25 ± 湖面面积的1.5%），持续4年以上周，位于50 m的湖岸，那里的蓝藻秋季繁殖特别密集。尽管毒素水平较低（～0.2 μg微囊藻毒素/L），高浓度的C-藻蓝蛋白引起了公众对富营养化、污染和气候变化的关注，并引起了政府和学术界的迅速反应。鉴于气候变化和营养污染正在增加蓝藻水华的规模和持续时间，在受冰盖覆盖的富营养化湖泊中，湖泊冰的蓝色染色可能会变得普遍。

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来源期刊

Lake and Reservoir Management 环境科学-海洋与淡水生物学

自引率

6.70%

发文量

期刊介绍： Lake and Reservoir Management (LRM) publishes original, previously unpublished studies relevant to lake and reservoir management. Papers address the management of lakes and reservoirs, their watersheds and tributaries, along with the limnology and ecology needed for sound management of these systems. Case studies that advance the science of lake management or confirm important management concepts are appropriate as long as there is clearly described management significance. Papers on economic, social, regulatory and policy aspects of lake management are also welcome with appropriate supporting data and management implications. Literature syntheses and papers developing a conceptual foundation of lake and watershed ecology will be considered for publication, but there needs to be clear emphasis on management implications. Modeling papers will be considered where the model is properly verified but it is also highly preferable that management based on the model has been taken and results have been documented. Application of known models to yet another system without a clear advance in resultant management are unlikely to be accepted. Shorter notes that convey important early results of long-term studies or provide data relating to causative agents or management approaches that warrant further study are acceptable even if the story is not yet complete. All submissions are subject to peer review to assure relevance and reliability for management application.