Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century

IF 1.1 4区环境科学与生态学 Q4 LIMNOLOGY

Lake and Reservoir Management Pub Date : 2023-01-02 DOI:10.1080/10402381.2022.2157781

Elizabeth J. Favot, C. Holeton, A. DeSellas, A. Paterson

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引用次数: 3

Abstract

Abstract Favot EJ, Holeton C, DeSellas AM, Paterson AM. 2023. Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century. Lake Reserv Manage. 39:1–20. The Ontario Ministry of the Environment, Conservation and Parks samples algal composition in response to public reports of suspected algal blooms, which have been tracked since 1994. In a previous analysis, Winter et al. noted a significant increase in the number of reports of confirmed algal blooms dominated by cyanobacteria from 1994 to 2009. Here, we determined that this increasing trend in the yearly number of confirmed cyanobacterial bloom reports (CCBRs) has persisted in Ontario over the intervening decade, to 2019. More than half of CCBRs were from waterbodies on the Precambrian Shield, in the Georgian Bay (5E) ecoregion, known for cottaging and water-based tourism. Data from the Ontario Lake Partner Program (LPP) was used to investigate total phosphorus (TP) concentrations in waterbodies with CCBRs. Approximately 44% of the waterbodies with a CCBR (mean TP 12.99 µg/L, n = 135) had average spring TP concentrations less than 10 µg/L, compared to 64% for LPP waterbodies with no reported or confirmed cyanobacterial blooms (mean TP 9.79 µg/L, n = 918). The most common taxon of cyanobacteria dominating bloom samples in inland waterbodies was Dolichospermum, followed by Aphanizomenon in waterbodies on the Precambrian Shield, and Microcystis in the Mixedwood Plains ecozone in southern Ontario. While an increase in public awareness cannot be ruled out in contributing to the rise in CCBRs across Ontario, the high proportion of cyanobacterial blooms occurring in oligotrophic waterbodies suggests that there may be a link to climate warming, rendering conditions more favorable for these blooms to occur.

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加拿大安大略省的蓝藻繁殖:在21世纪的报告中持续增加

摘要Favot EJ，Holeton C，DeSellas AM，Paterson AM。2023。加拿大安大略省蓝藻水华：21世纪报告持续增加。湖泊保护区管理。39:1–20.安大略省环境、保护和公园部对藻类成分进行了采样，以回应自1994年以来一直在追踪的疑似藻华的公开报告。在之前的一项分析中，Winter等人注意到，从1994年到2009年，已确认的以蓝藻为主的藻华报告数量显著增加。在这里，我们确定，在这中间的十年里，安大略省每年确认的蓝藻水华报告（CCBR）数量的增加趋势一直持续到2019年。超过一半的CCBR来自前寒武纪地盾上的水体，位于格鲁吉亚湾（5E）生态区，以别墅和水上旅游而闻名。安大略湖合作伙伴计划（LPP）的数据用于研究CCBR水体中的总磷（TP）浓度。约44%的水体具有CCBR（平均TP 12.99 µg/L，n = 135）的春季平均TP浓度小于10 µg/L，相比之下，没有报告或确认蓝藻水华的LPP水体为64%（平均TP 9.79 µg/L，n = 918）。内陆水体中占主导地位的蓝藻样本最常见的分类单元是Dolichspermum，其次是前寒武纪地盾上水体中的Aphanizemnon，以及安大略省南部Mixedwood平原生态带中的微囊藻。虽然不能排除公众意识的提高会导致安大略省CCBR的增加，但在贫营养水体中发生的蓝藻水华比例很高，这表明可能与气候变暖有关，从而使这些水华的发生条件更加有利。

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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.