Managing and Preventing Harmful Algal Blooms (HABs): Do We Know Enough? (2nd Edition)

A special issue of Toxins (ISSN 2072-6651). This special issue belongs to the section "Marine and Freshwater Toxins".

Deadline for manuscript submissions: 31 July 2025 | Viewed by 503

Special Issue Editor


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Guest Editor
1. Brain Chemistry Labs, Institute for Ethnomedicine, Jackson, WY 83001, USA
2. Department of Biological Sciences, Bowling Green University, Bowling Green, OH 43403, USA
Interests: cyanobacteria; toxins; analysis; toxicology; toxin discovery
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Special Issue Information

Dear Colleagues,

Marine and freshwater ecosystems are frequently populated with harmful cyanobacterial or algal blooms that can result in the closure of waterbodies, fisheries, and recreational areas, which would lead to significant impacts including economic effects from produce loss (e.g., fish and shellfish) and negative effects on tourism, as well as the closure of water treatment plants. Studying such blooms for many years has advanced our understanding of the risks associated with exposure to these organisms and the toxins they produce, including a greater understanding of the health risks associated with long-term exposure to these compounds. However, many uncertainties and gaps may still remain. This Special Issue aims to ask the question of whether we know enough regarding harmful cyanobacterial and algal blooms and what further fundamental and applied research studies are required. Examples of such issues may include the detection, monitoring, health risks, and treatment and mitigation solutions of blooms and toxins. Therefore, this Special Issue solicits manuscripts concerning all aspects of detection, risk assessment, and the management and prevention of harmful cyanobacterial and algal blooms, as well as novel and innovative practical solutions to fill the current gaps in knowledge and science.

This Special Issue will serve as the second edition of “Managing and Preventing Harmful Algal Blooms (HABs): Do We Know Enough?”, which was edited in 2023 and resulted in four interesting publications.

Dr. James S. Metcalf
Guest Editor

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Keywords

  • catchment
  • exposure
  • analysis
  • remediation
  • health surveillance

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Published Papers (1 paper)

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25 pages, 723 KiB  
Systematic Review
Systematic Review on CyanoHABs in Central Asia and Post-Soviet Countries (2010–2024)
by Kakima Kastuganova, Galina Nugumanova and Natasha S. Barteneva
Toxins 2025, 17(5), 255; https://doi.org/10.3390/toxins17050255 - 20 May 2025
Viewed by 217
Abstract
Cyanobacterial harmful blooms (CyanoHABs) in lakes, estuaries, and freshwater reser-voirs represent a significant risk to water authorities worldwide due to their cyanotoxins and economic impacts. The duration, spread, and severity of CyanoHABs have markedly increased over the past decades. The article addresses CyanoHABs, [...] Read more.
Cyanobacterial harmful blooms (CyanoHABs) in lakes, estuaries, and freshwater reser-voirs represent a significant risk to water authorities worldwide due to their cyanotoxins and economic impacts. The duration, spread, and severity of CyanoHABs have markedly increased over the past decades. The article addresses CyanoHABs, cyanotoxins, and monitoring methodologies in post-Soviet and Central Asian countries. This particular re-gion was selected for the systematic review due to its relative lack of representation in global CyanoHABs reporting, particularly in Central Asia. The main aim of this systematic review was to analyze the primary literature available from 2010–2024 to examine the current situation of CyanoHAB detection, monitoring, and management in Central Asia and post-Soviet countries. Following a detailed database search in several selected data-bases (Google Scholar, Pubmed, Web of Science (WOS), Scopus, Elibrary, ENU, and KazNU) along with additional hand searching and citation searching, 121 primary arti-cles reporting 214 local cyanobacterial bloom cases were selected for this review. Aquatic cyanotoxins were reported in water bodies of eight countries, including high concentra-tions of microcystins that often exceeded reference values established by the World Health Organization (WHO). Advancing monitoring efforts in Baltic countries, Belarus, and the Russian Federation differed from only a few Central Asian reports. However, Central Asian aquatic ecosystems are especially threatened by rising anthropogenic pressures (i.e., water use, intensive agriculture, and pollution), climate change, and the lack of adequate ecological surveillance. We hypothesize that recent Caspian seal mass mortality events have been caused by a combination of infection (viral or bacterial) and exposure to algal neurotoxins resulting from harmful algal blooms of Pseudo-nitzschia. We conclude that there is an urgent need to improve the assessment of cyanobacterial blooms in Central Asia and post-Soviet countries. Full article
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