Jones, Alice C., Arapi, Elissavet A., Paterson, Rachel A. and Cable, Jo  ORCID: https://orcid.org/0000-0002-8510-7055
2026.
Reversal interaction of water temperature and Roundup® pollution on the survival and reproduction of Chaetogaster limnaei limnaei, symbiont of Radix balthica.
Journal of Freshwater Ecology
41
(1)
, 2652320.
10.1080/02705060.2026.2652320
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Abstract
Freshwater ecosystems are at risk from global warming and anthropogenic pollutants affecting all trophic levels, including symbionts. These organisms are influenced directly by environmental stressors and indirectly through changes in host range, immunity and survival, with their interactions potentially resulting in non-additive outcomes. Here, we investigated the cumulative and interactive effects of water temperature and Roundup® pollution, a widely used herbicide, on the survival of the freshwater symbiont Chaetogaster limnaei limnaei and its snail host Radix balthica. This host‒symbiont pairing was subject to 28 different treatments, a combination of seven ecologically relevant Roundup concentrations (0, 0.36, 1.1, 2.2, 3.6, 5 and 7 mgL−1) at four different temperatures (7, 11, 15 and 19 °C) for 51 days. Rising temperature increased symbiont abundance over time, whilst Roundup had no independent effect. Yet, when combined, a reversal interaction was observed, reducing symbiont numbers over time and peak count. Furthermore, peak day of symbiont numbers was significantly reduced by the combined stressors, despite remaining unaffected by individual stressors. Host survival was significantly reduced by increased temperature but not significantly altered by Roundup or the combined interaction. These findings highlight the importance of considering multiple, interacting stressors when assessing ecological impacts in freshwater systems.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Biosciences |
| Publisher: | Taylor & Francis: STM, Behavioural Science and Public Health Titles |
| ISSN: | 0270-5060 |
| Date of First Compliant Deposit: | 13 April 2026 |
| Date of Acceptance: | 24 March 2026 |
| Last Modified: | 13 Apr 2026 13:28 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/186326 |
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