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

Khuong Van Dinh*, Maria Winberg Olsen, Dag Altin, Bent Vismann, Torkel Gissel Nielsen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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.
Original languageEnglish
JournalEnvironmental science and pollution research international
Volume26
Issue number28
Pages (from-to)29327-29333
ISSN0944-1344
DOIs
Publication statusPublished - 2019

Keywords

  • Climate change
  • Grazing rate
  • Marine copepods
  • Organic contaminants
  • Pelagic community
  • Primary grazers

Cite this

@article{98a817235e4e4d01acf663b777afbe12,
title = "Impact of temperature and pyrene exposure on the functional response of males and females of the copepod Calanus finmarchicus",
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.",
keywords = "Climate change, Grazing rate, Marine copepods, Organic contaminants, Pelagic community, Primary grazers",
author = "Dinh, {Khuong Van} and Olsen, {Maria Winberg} and Dag Altin and Bent Vismann and Nielsen, {Torkel Gissel}",
year = "2019",
doi = "10.1007/s11356-019-06078-x",
language = "English",
volume = "26",
pages = "29327--29333",
journal = "Environmental Science and Pollution Research",
issn = "0944-1344",
publisher = "Springer",
number = "28",

}

Impact of temperature and pyrene exposure on the functional response of males and females of the copepod Calanus finmarchicus. / Dinh, Khuong Van; Olsen, Maria Winberg; Altin, Dag; Vismann, Bent; Nielsen, Torkel Gissel.

In: Environmental science and pollution research international, Vol. 26, No. 28, 2019, p. 29327-29333.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Impact of temperature and pyrene exposure on the functional response of males and females of the copepod Calanus finmarchicus

AU - Dinh, Khuong Van

AU - Olsen, Maria Winberg

AU - Altin, Dag

AU - Vismann, Bent

AU - Nielsen, Torkel Gissel

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Climate change

KW - Grazing rate

KW - Marine copepods

KW - Organic contaminants

KW - Pelagic community

KW - Primary grazers

U2 - 10.1007/s11356-019-06078-x

DO - 10.1007/s11356-019-06078-x

M3 - Journal article

VL - 26

SP - 29327

EP - 29333

JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

SN - 0944-1344

IS - 28

ER -