Transgenerational effects of cyanobacterial toxins on a tropical micro-crustacean Daphnia lumholtzi across three generations

Environmental Pollution
Thanh-Son DaoKhuong V Dinh

Abstract

Climate change and human activities induce an increased frequency and intensity of cyanobacterial blooms which could release toxins to aquatic ecosystems. Zooplankton communities belong to the first affected organisms, but in tropical freshwater ecosystems, this issue has yet been poorly investigated. We tested two questions (i) if the tropical Daphnia lumholtzi is capable to develop tolerance to an ecologically relevant concentration of purified microcystin-LR and microcystins from cyanobacterial extract transferable to F1 and F2 generations? And (ii) would F1 and F2 generations recover if reared in toxin-free medium? To answer these questions, we conducted two full factorial mutigenerational experiments, in which D. lumholtzi was exposed to MC-LR and cyanobacterial extract at the concentration of 1 μg L-1 microcystin continuously for three generations. After each generation, each treatment was spit into two: one reared in the control (toxin free) while the other continued in the respective exposure. Fitness-related traits including survival, maturity age, body length, and fecundity of each D. lumholtzi generation were quantified. Though there were only some weak negative effects of the toxins on the first generation (F0), we ...Continue Reading

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Citations

Jun 25, 2020·Scientific Reports·Khuong V DinhKiem N Truong
Sep 1, 2020·Ecotoxicology and Environmental Safety·Dung Thi DongDayanthi Nugegoda
Sep 30, 2020·Environmental Research·Shiyu ZhangHuizhen Zhang
May 29, 2021·Aquatic Toxicology·Rikke PoulsenNina Cedergreen
Jun 16, 2021·Biology Letters·Matthew R Walsh, Michael K Gillis
Jul 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Lisa Efriani PuluhulawaNasrul Wathoni

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