Kratina, Pavel and Watts, Tania J and Green, Dannielle S and Kordas, Rebecca L and O'Gorman, Eoin J (2019) Interactive effects of warming and microplastics on metabolism but not feeding rates of a key freshwater detritivore. Environmental Pollution, 255 (Pt 2). p. 113259. DOI https://doi.org/10.1016/j.envpol.2019.113259
Kratina, Pavel and Watts, Tania J and Green, Dannielle S and Kordas, Rebecca L and O'Gorman, Eoin J (2019) Interactive effects of warming and microplastics on metabolism but not feeding rates of a key freshwater detritivore. Environmental Pollution, 255 (Pt 2). p. 113259. DOI https://doi.org/10.1016/j.envpol.2019.113259
Kratina, Pavel and Watts, Tania J and Green, Dannielle S and Kordas, Rebecca L and O'Gorman, Eoin J (2019) Interactive effects of warming and microplastics on metabolism but not feeding rates of a key freshwater detritivore. Environmental Pollution, 255 (Pt 2). p. 113259. DOI https://doi.org/10.1016/j.envpol.2019.113259
Abstract
Microplastics are an emerging pollutant of high concern, with their prevalence in the environment linked to adverse impacts on aquatic organisms. However, our knowledge of these impacts on freshwater species is rudimentary, and there is almost no research directly testing how these effects can change under ongoing and future climate warming. Given the potential for multiple stressors to interact in nature, research on the combined impacts of microplastics and environmental temperature requires urgent attention. Thus, we experimentally manipulated environmentally realistic concentrations of microplastics and temperature to partition their independent and combined impacts on metabolic and feeding rates of a model freshwater detritivore. There was a significant increase in metabolic and feeding rates with increasing body mass and temperature, in line with metabolic and foraging theory. Experimental warming altered the effect of microplastics on metabolic rate, which increased with microplastic concentration at the lowest temperature, but decreased at the higher temperatures. The microplastics had no effect on the amount of litter consumed by the detritivores, therefore, did not result in altered feeding rates. These results show that the metabolism of important freshwater detritivores could be altered by short-term exposure to microplastics, with greater inhibition of metabolic rates at higher temperatures. The consequences of these metabolic changes may take longer to manifest than the duration of our experiments, requiring further investigation. Our results suggest little short-term impact of microplastics on litter breakdown by gammarid amphipods and highlight the importance of environmental context for a better understanding of microplastic pollution in freshwater ecosystems.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | Climate warming; Leaf litter breakdown; Multiple stressors; Oxygen consumption; Pollution; Shredder |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 20 Sep 2019 09:25 |
Last Modified: | 07 Aug 2024 19:26 |
URI: | http://repository.essex.ac.uk/id/eprint/25400 |
Available files
Filename: 1-s2.0-S0269749119339375-main.pdf
Licence: Creative Commons: Attribution-Noncommercial-No Derivative Works 3.0