Impact of temperature and pyrene exposure on the functional response of males and females of the copepod Calanus finmarchicus

Environmental Science and Pollution Research International
Khuong V DinhTorkel Gissel Nielsen

Abstract

We know very little about the effects of two global stressors, elevated temperature and contaminants, on the grazing of marine copepods. To address this issue, we tested the hypotheses that the individual and combined effects of these two stressors may reduce grazing rates and may depend on food availability and gender. We exposed male and female Calanus finmarchicus copepods to pyrene at two temperatures (10 and 14 °C) and six food concentrations (25-800 μg C Rhodomonas baltica L-1) and measured fecal pellet size, and grazing rate (GR) from pellet production. Males had smaller fecal pellets and lower GR than did females. Temperature and pyrene exposure had no effect on pellet size. Temperature alone had no effect on GR of males, but females had lower GR at elevated temperature. Pyrene-exposed males and females had lower GR only at the food concentrations of 200-800 μg C R. baltica L-1 and those patterns were independent of temperature. Pyrene-induced reduction in GR was stronger in females than in males. The negative effects of both elevated temperature and pyrene may reduce the abundance and trophic success of C. finmarchicus in a warmer, more polluted future.

References

Nov 14, 2001·Archives of Environmental Contamination and Toxicology·M MedinaD J Baird
Jan 5, 2002·Marine Environmental Research·C M Reddy, J G Quinn
Jan 10, 2006·Environmental Toxicology and Chemistry·Carlos BarataJosep Maria Bayona
Apr 21, 2009·Environment International·Pamela D NoyesEdward D Levin
Jul 20, 2011·Proceedings of the National Academy of Sciences of the United States of America·Christopher M ReddyRichard Camilli
Nov 13, 2012·Ecotoxicology·Julie Cornelius GrenvaldMorten Hjorth
Jul 9, 2017·The Science of the Total Environment·Kamille Elvstrøm KrauseTorkel Gissel Nielsen
Aug 22, 2018·Environmental Science & Technology·Kirstine ToxværdTorkel Gissel Nielsen

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Citations

Jun 25, 2020·Scientific Reports·Khuong V DinhKiem N Truong
Dec 20, 2019·Applied Microbiology and Biotechnology·Amin GasmiGeir Bjørklund
Sep 1, 2020·Ecotoxicology and Environmental Safety·Dung Thi DongDayanthi Nugegoda

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