Staff

Micha Wehrli

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Micha Wehrli

PhD Student

Department Environmental Chemistry

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Publications

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Pre‐exposure to chemicals increases springtail vulnerability to high temperatures

Global climate change is increasing the frequency and intensity of heat waves, posing a significant threat to ectothermic organisms. Concurrently, chemical pollution, including heavy metals and pesticides, remains a pervasive environmental stressor. This study investigates the effects of sub-lethal copper and fluazinam exposure on the thermal tolerance of the soil-dwelling springtail, Folsomia candida. Using a thermal death time (TDT) framework, we assessed how pre-exposure to these toxicants at two acclimation temperatures (20°C and 24°C) influenced survival under heat stress. Our findings indicate that toxicant exposure reduced heat tolerance at moderately high temperatures (32.5°C) but had negligible effects at extreme temperatures (37°C). Acclimation at 24°C mitigated the negative effects of both toxicants, suggesting an enhanced capacity for cellular homeostasis under warm conditions. Additionally, soil type influenced thermal tolerance, highlighting the importance of environmental context in multiple stressor interactions. These findings highlight the need to integrate realistic thermal exposure scenarios in ecotoxicological assessments to improve predictions of organismal vulnerability under climate change.
Wehrli, M.; Ge, J.; Slotsbo, S.; Holmstrup, M. (2025) Pre‐exposure to chemicals increases springtail vulnerability to high temperatures, Global Change Biology, 31(7), e70374 (11 pp.), doi:10.1111/gcb.70374, Institutional Repository

Empowering the next generation of environmental scientists: highlights from the 13th SETAC YES meeting in York, UK

The 13th Young Environmental Scientists (YES) Meeting, held in York, United Kingdom, from the 11-15th August 2025, continued the tradition of fostering interdisciplinary collaboration and professional development among early-career researchers in environmental sciences. Organised by the SETAC Europe Student Advisory Council (SAC), this student-led conference brought together 111 participants from 22 countries, offering a dynamic platform for scientific exchange across all different disciplines that exist within SETAC. Under the theme, "Between Grinding Gears—Students and Early Career Scientists Under Pressure", the meeting featured over 100 scientific contributions, four interactive workshops and three keynote lectures that addressed scientific challenges as well as personal- and professional realities faced by students and early career scientists. Beside the academic program, there were also social events to bolster networking among peers, strengthening the community that defines the YES meetings and securing its role as a cornerstone for early-career engagement within SETAC. This commentary highlights the scientific and social achievements of the 2025 edition, the financial support that made it possible, and the collaborative spirit that brought it to life. As we look to the future, the continued success of the YES Meeting depends on the passion and voluntary engagement of students and early-career researchers, whose energy and commitment will continue to advance this unique, student-driven platform thriving as a space for growth, collaboration, and lasting friendships.
Wehrli, M.; Ashfield, N.; Law, I. N.; Stadelmann, B.; Appelt, J.-S.; Chen, F.; Machado, C.; Jennes, S.; Bourassi, H.; Dechent, B.; Schmitt, M.; Germing, K.; Glasgow, S.; Oster, S.; Meyer, F.; Schmitz, M. (2026) Empowering the next generation of environmental scientists: highlights from the 13th SETAC YES meeting in York, UK, Environmental Sciences Europe, 38(1), 41 (10 pp.), doi:10.1186/s12302-026-01344-5, Institutional Repository
Wehrli, M.; Ashfield, N.; Appelt, J.-S.; Schmitz, M. (2025) Young environmental scientists meeting: supporting early career researchers in environmental toxicology and chemistry, SETAC Globe, (4 pp.), Institutional Repository
Wehrli, M.; Ashfield, N.; Navarro Law, I.; Chen, F. (2025) SETAC YES meeting in york inspires the next generation of environmental scientists, SETAC Globe, (4 pp.), Institutional Repository
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Address

E-Mail: micha.wehrli@eawag.ch
Phone: +41 58 765 5480
Fax: +41 58 765 5802
Address: Eawag
Überlandstrasse 133
8600 Dübendorf
Office: LA. D67
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