UNESCO Harmful Algae News NO.80

Feature article

• An extensive bloom of filamentous cyanobacteria in the Baltic Sea region in summer 2025
  Bengt Karlson, Lars Arneborg, Lars Axell, Mikael Hedblom, Anders Torstensson, Inga Kozsalka, Malin Olofsson, Malin Persson & Aida Zuberovic Muratovic (p. 1)

HAB events and prediction

• An updated high-resolution, site-specific Karenia brevis bloom severity index and associated respiratory irritation impacting the southwest Florida coast
  Yizhen Li, R Wayne Litaker, Richard Stumpf, Barbara Kirkpatrick, Katherine Hubbard & Katherine Kohler Harrison (p. 5)

• Seeing Blooms in a New Light: Digital Holography for HAB Monitoring in Lake Erie
  Ahammad Abdullah, Aditya R Nayak, Timothy S Moore, Karl R. Bosse & Michael J Sayers (p. 10)

• Lingulaulax polyedra bloom in the Port of Tomis, Romania
  Andreea Cristina Gigică, Oana Vlas, Laura Boicenco & Bernd Krock (p. 12)

• The benthic dinoflagellate genus Prorocentrum in five countries of Oceania
  Tomohiro Nishimura, J. Sam Murray, Lesley L. Rhodes, Kirsty F. Smith, Lucy Thompson, Muharrem Balci, Michaela E. Larsson, Arjun Verma & Shauna A. Murray (p. 15)

• Harmful phytoplankton in Ciénaga Grande de Santa Marta: The Largest Lagoon-Delta Ecosystem in the Colombian Caribbean
  José Ernesto Mancera Pineda & Edgar Arteaga Sogamoso (p. 18)

HAB Training and networking

• International Symposium on Ciguatera Poisoning in the Pacific, hosted in Aotearoa New Zealand
  Laura Biessy, Kirsty F. Smith, Mireille Chinain, H. Taiana Darius & Clémence Gatti (p. 21)

• Sharing Italian Experience on Harmful Algae 2024/25 within BlueShellfish MCSA Staff Exchange 10108623
  Carmela Dell’Aversano, Chiara Melchiorre, Luciana Tartaglione, Michela Varra, Jorge Diogène & Mònica Campàs (p. 23)

New international project and opportunities for students and ECRs

• Phycotoxins in the Arctic marine ecosystem: an emerging climate change risk (PHATE)
  Sofia Ribeiro & Audrey Limoges (p. 25)

Interview

• Interview with Barrie Dale
  Barrie Dale & Kenneth Mertens (p. 27)

Red Tides Archives

• Youssef Halim, the Creator of a “Celebrity”: Alexandrium
  Rut Akselman (p. 34)

In Memoriam

• Ruth Akselman
  Silvia Méndez & Beatriz Reguera (p. 37)

Beyond HAB Science

• Carved Wooden Models of Microalgae
  Haruyoshi Takayama (p. 39)

Forthcoming

• ISSHA Corner with update on ICHA 2025 in October, Chile (p. 41)

• Mixoplankton session in AGU/ASLO February 2026 (p. 42)

• Dino13 conference in Bremen, Germany – 5 to 7 July 2026 (p. 42)

• International Conference on Molluscan Shellfish Safety (ICMSS) in Exeter, September 2026 (p. 43)