Das Gesundheitsamt hat bei einer Routinekontrolle massenhaft Dolichospermum – eine Gattung der Cyanobakterien - im Wasser nachgewiesen.

Lake Greifensee is periodically affected by cyanobacterial blooms and associated cyanotoxins20,21,22 (Fig. 1). Our study focuses on two key groups: the toxic Microcystaceae group (Microcystis spp., Aphanothece spp., Aphanocapsa spp.) and Dolichospermum spp. Microcystacae are the most common potentially toxic bloom-forming cyanobacteria worldwide23, typically blooming in Greifensee during summer and autumn (Fig. 1c). Previous studies confirm the production of microcystins and numerous other bioactive metabolites from this group in the lake, including during our study period20,22. Dolichospermum, the second most common potentially toxic bloom-forming cyanobacterium globally, is known to produce both hepatotoxins and neurotoxins3,24. While rarely forming surface blooms in Greifensee, it reaches peak abundance in late summer, and bioactive metabolites potentially associated with this taxon are found during the study period22. Our high-resolution data reveal significant temporal fluctuations in both cyanobacteria (Fig. 1c). This provides a unique opportunity to examine growth dynamics and their relationships with biotic and abiotic factors at temporal scales directly relevant to bloom formation. To quantify these dynamics and investigate the influence of biotic interactions, we present an nGR analysis based on high-frequency monitoring data. To estimate daily nGRs, we calculate the difference in the natural logarithm of taxon densities for each taxon between consecutive...

Phytoplankton community responses to nutrient-management interventions in agricultural catchments remain poorly understood, particularly with respect to functional group transitions. Petit-lac-Sai...

This study examines an in-depth analysis of the physiological and biochemical responses in the cyanobacterium Dolichospermum spiroides HKAR-23 under various treatment conditions of photosynthetically ...

World Journal of Microbiology and Biotechnology - Phycocyanin (PC), a water-soluble pigment-protein complex, is well known for its wide range of biological functions. PC is composed of two...

Eutrophication is generally considered as a major factor in the outbreak of cyanobacterial blooms, yet some species can thrive even bloom under low ph…

Read the full story from the University of Michigan. See also: Paul A. Den Uyl, E. Anders Kiledal, Reagan M. Errera, Subba Rao Chaganti, Casey M. Godwin, Heather A. Raymond, Gregory J. Dick. Genomic Identification and Characterization of Saxitoxin Producing Cyanobacteria in Western Lake Erie Harmful Algal Blooms. Environmental Science, 2025; 59 (15): 7600 DOI: 10.1021/acs.est.4c10888 Dolichospermum, a type of cyanobacteria thriving in Lake Erie’s warming waters, has been identified as the surprising culprit behind the lake’s dangerous saxitoxins—some of the most potent natural neurotoxins known.

Heterocystous cyanobacteria are increasingly forming surface blooms in freshwater ecosystems, with massive proliferation events influenced by multiple…