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Effects of a future warmer ocean on the coexisting copepods Calanus finmarchicus and C. glacialis in Disko Bay, Western Greenland. / Kjellerup, Sanne; Dünweber, Michael; Swalethorp, Rasmus; Nielsen, Torkel Gissel; Møller, E.F.; Markager, S.; Hansen, B.W.

In: Marine Ecology - Progress Series, Vol. 447, 2012, p. 87-108.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Kjellerup, Sanne; Dünweber, Michael; Swalethorp, Rasmus; Nielsen, Torkel Gissel; Møller, E.F.; Markager, S.; Hansen, B.W. / Effects of a future warmer ocean on the coexisting copepods Calanus finmarchicus and C. glacialis in Disko Bay, Western Greenland.

In: Marine Ecology - Progress Series, Vol. 447, 2012, p. 87-108.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{54e72832d97d4f6fad4d2f1ed6bab658,
title = "Effects of a future warmer ocean on the coexisting copepods Calanus finmarchicus and C. glacialis in Disko Bay, Western Greenland",
publisher = "Inter-Research",
author = "Sanne Kjellerup and Michael Dünweber and Rasmus Swalethorp and Nielsen, {Torkel Gissel} and E.F. Møller and S. Markager and B.W. Hansen",
year = "2012",
doi = "10.3354/meps09551",
volume = "447",
pages = "87--108",
journal = "Marine Ecology - Progress Series",
issn = "0171-8630",

}

RIS

TY - JOUR

T1 - Effects of a future warmer ocean on the coexisting copepods Calanus finmarchicus and C. glacialis in Disko Bay, Western Greenland

A1 - Kjellerup,Sanne

A1 - Dünweber,Michael

A1 - Swalethorp,Rasmus

A1 - Nielsen,Torkel Gissel

A1 - Møller,E.F.

A1 - Markager,S.

A1 - Hansen,B.W.

AU - Kjellerup,Sanne

AU - Dünweber,Michael

AU - Swalethorp,Rasmus

AU - Nielsen,Torkel Gissel

AU - Møller,E.F.

AU - Markager,S.

AU - Hansen,B.W.

PB - Inter-Research

PY - 2012

Y1 - 2012

N2 - The effects of temperature and food was examined for Calanus finmarchicus and C. glacialis during 3 phases of the phytoplankton spring bloom in Disko Bay, western Greenland. The 2 species were collected during pre-bloom, bloom, and post-bloom and exposed to temperatures from 0 to 10°C, combined with deficient or excess food. Fecal pellet and egg production were measured as indices for grazing and secondary production, respectively. Furthermore, changes in body carbon, nitrogen, and lipid content were measured. C. glacialis sampled before the bloom and incubated with excess food exhibited high specific egg production at temperatures between 0 and 2.5°C. Higher temperatures did not increase egg production considerably, whereas egg production for C. finmarchicus more than tripled between 2.5 and 5°C. Starved C. glacialis produced eggs at all temperatures stimulated by increasing temperatures, whereas starved C. finmarchicus needed temperatures above 5°C to produce eggs fueled by their lipid stores. Few C. finmarchicus had mature gonads at the initiation of the pre-bloom and bloom experiment, and egg production of C. finmarchicus therefore only increased as the ratio of individuals with mature gonads increased. During the bloom, both C. glacialis and C. finmarchicus used the high food availability for egg production, while refueling or exhausting their lipid stores, respectively. Finally, during the post-bloom experiment, production was low by C. finmarchicus, whereas C. glacialis had terminated production. Our results suggest that a future warmer ocean will reduce the advantage of early spawning by C. glacialis and that C. finmarchicus will become increasingly prevalent

AB - The effects of temperature and food was examined for Calanus finmarchicus and C. glacialis during 3 phases of the phytoplankton spring bloom in Disko Bay, western Greenland. The 2 species were collected during pre-bloom, bloom, and post-bloom and exposed to temperatures from 0 to 10°C, combined with deficient or excess food. Fecal pellet and egg production were measured as indices for grazing and secondary production, respectively. Furthermore, changes in body carbon, nitrogen, and lipid content were measured. C. glacialis sampled before the bloom and incubated with excess food exhibited high specific egg production at temperatures between 0 and 2.5°C. Higher temperatures did not increase egg production considerably, whereas egg production for C. finmarchicus more than tripled between 2.5 and 5°C. Starved C. glacialis produced eggs at all temperatures stimulated by increasing temperatures, whereas starved C. finmarchicus needed temperatures above 5°C to produce eggs fueled by their lipid stores. Few C. finmarchicus had mature gonads at the initiation of the pre-bloom and bloom experiment, and egg production of C. finmarchicus therefore only increased as the ratio of individuals with mature gonads increased. During the bloom, both C. glacialis and C. finmarchicus used the high food availability for egg production, while refueling or exhausting their lipid stores, respectively. Finally, during the post-bloom experiment, production was low by C. finmarchicus, whereas C. glacialis had terminated production. Our results suggest that a future warmer ocean will reduce the advantage of early spawning by C. glacialis and that C. finmarchicus will become increasingly prevalent

U2 - 10.3354/meps09551

DO - 10.3354/meps09551

JO - Marine Ecology - Progress Series

JF - Marine Ecology - Progress Series

SN - 0171-8630

VL - 447

SP - 87

EP - 108

ER -