Wood_Everall et al ENV_POLL2018.pdf (1.78 MB)
0/0

Sensitivity of the early life stages of a mayfly to fine sediment and orthophosphate levels

Download (1.78 MB)
journal contribution
posted on 25.01.2018 by Nicholas C. Everall, Matthew F. Johnson, Paul Wood, Lauren Mattingley
© 2017 Elsevier Ltd. The ecological effects of interacting stressors within lotic ecosystems have been widely acknowledged. In particular, the ecological effects of elevated fine sediment inputs and phosphate have been identified as key factors influencing faunal community structure and composition. However, while knowledge regarding adult and larval life stage responses to environmental stressors has grown, there has been very limited research on their eggs. In this study, the eggs of the mayfly Serratella ignita (Ephemerellidae: Ephemeroptera) were collected and incubated in laboratory aquaria to hatching under differing concentrations of inert suspended sediment (SS) and orthophosphate (OP), individually and in combination. Results indicate that SS and OP have greater effects on egg hatching in combination than when either were considered in isolation. SS displayed a greater effect on egg survival than OP in isolation or when OP was added to elevated SS treatments. Egg mortality in control treatments was around 6% compared to 45% in treatments with 25 mg l -1 SS and 52% in 0.3 mg l -1 OP treatments. Even relatively modest levels of each stressor (10 mg l -1 SS; 0.1 mg l -1 OP), below national legal thresholds, had significant effects on egg survival to hatching. The results support calls for legal levels of SS to be reassessed and suggest that more research is required to assess the impacts of pollution on invertebrate egg development given their different sensitivity and exposure pathways compared to other life stages.

Funding

This work was supported by the Salmon and Trout Conservation UK who provided funding for the chemical analysis.

History

School

  • Social Sciences

Department

  • Geography and Environment

Published in

Environmental Pollution

Citation

EVERALL, N.C. ...et al., 2017. Sensitivity of the early life stages of a mayfly to fine sediment and orthophosphate levels. Environmental Pollution, 237, pp.792-802.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

31/10/2017

Publication date

2017

Notes

This paper was published in the journal Environmental Pollution and the definitive published version is available at https://doi.org/10.1016/j.envpol.2017.10.131.

ISSN

0269-7491

eISSN

1873-6424

Language

en

Exports

Logo branding

Keyword(s)

Exports