ArticleISME communications2026
Diversity and biological activity of freshwater copepodamides during a spring bloom in the Římov reservoir.
Article in ISME communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Copepodamides are kairomones released by copepods, one of the most dominant zooplankton groups in aquatic ecosystems, which trigger anti-grazing defences in phytoplankton. Whilst widespread in marine ecosystems, their prevalence, diversity, and ecological roles in freshwater ecosystems remain largely unexplored. In this study, we conducted a comprehensive analysis of copepodamides from the eutrophic Římov Reservoir (Czech Republic) during the spring bloom to evaluate their diversity, temporal dynamics, and bioactivity. Using untargeted mass spectrometry, we identified 18 distinct dihydrocopepodamides (dhCAs), including five previously unreported variants. Interestingly, the congener 20:1 dhCA was detected in freshwater for the first time. Temporal analysis revealed that whilst 20:1 dhCA was initially restricted to the macroplankton fraction (>50 μm), its concentration in the microplankton fraction (<50 μm) gradually increased from 0% to 13% of total copepodamides during bloom progression, indicating active release or cellular turnover. Bioassays using the marine diatom
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