Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean)
Calanoid copepods dominate mesozooplankton biomass in the Arctic Ocean. Variations in C content, C:N ratio and stable isotope composition ( δ 13C, δ 15N) of Calanus hyperboreus , Calanus glacialis and Metridia longa collected from January to August 2008 in the southeast Beaufort Sea provided insight...
Published in: | Journal of Plankton Research |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2011
|
Subjects: | |
Online Access: | http://plankt.oxfordjournals.org/cgi/content/short/33/1/161 https://doi.org/10.1093/plankt/fbq103 |
id |
fthighwire:oai:open-archive.highwire.org:plankt:33/1/161 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:plankt:33/1/161 2023-05-15T13:22:57+02:00 Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) Forest, Alexandre Galindo, Virginie Darnis, Gérald Pineault, Simon Lalande, Catherine Tremblay, Jean-Éric Fortier, Louis 2011-01-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/33/1/161 https://doi.org/10.1093/plankt/fbq103 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/33/1/161 http://dx.doi.org/10.1093/plankt/fbq103 Copyright (C) 2011, Oxford University Press ORIGINAL ARTICLES TEXT 2011 fthighwire https://doi.org/10.1093/plankt/fbq103 2013-05-27T03:17:52Z Calanoid copepods dominate mesozooplankton biomass in the Arctic Ocean. Variations in C content, C:N ratio and stable isotope composition ( δ 13C, δ 15N) of Calanus hyperboreus , Calanus glacialis and Metridia longa collected from January to August 2008 in the southeast Beaufort Sea provided insights into their metabolism, feeding and reproduction. Seasonal differences in the C–prosome length relationships and C:N ratios were driven by distinct spawning strategies and changes in lipid content. Relatively high copepod biomass over the study period (2.6–9.7 g C m−2) corresponded to favorable growth conditions in 2007–2008. The mean 15N enrichment of copepods (+2.8–4.7‰) relative to particulate organic nitrogen values recorded at the ice bottom and at the chlorophyll maximum indicated a primarily herbivorous diet. In all species, δ 13C and δ 15N decreased markedly in April, reflecting the feeding onset on ice algae, but a rapid transition to feeding on phytoplankton occurred as a pelagic bloom was triggered by the early ice melt in May. A second decline in the δ 13C and δ 15N of copepods was recorded in June–July, coincident with a second increase in phytoplankton production. The two isotope depletion events in copepods were both followed by a return to high values and an increase in their C:N as a consequence of previous C fixation and nitrate limitation in phytoplankton and the likely formation of body reserves/tissue. Our results illustrate that Arctic calanoids respond quickly to any increase in primary production and can cope with changes in its nature and timing. Text Amundsen Gulf Arctic Arctic Ocean Beaufort Sea Calanus glacialis Calanus hyperboreus ice algae Phytoplankton Copepods HighWire Press (Stanford University) Arctic Arctic Ocean Journal of Plankton Research 33 1 161 178 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
ORIGINAL ARTICLES |
spellingShingle |
ORIGINAL ARTICLES Forest, Alexandre Galindo, Virginie Darnis, Gérald Pineault, Simon Lalande, Catherine Tremblay, Jean-Éric Fortier, Louis Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) |
topic_facet |
ORIGINAL ARTICLES |
description |
Calanoid copepods dominate mesozooplankton biomass in the Arctic Ocean. Variations in C content, C:N ratio and stable isotope composition ( δ 13C, δ 15N) of Calanus hyperboreus , Calanus glacialis and Metridia longa collected from January to August 2008 in the southeast Beaufort Sea provided insights into their metabolism, feeding and reproduction. Seasonal differences in the C–prosome length relationships and C:N ratios were driven by distinct spawning strategies and changes in lipid content. Relatively high copepod biomass over the study period (2.6–9.7 g C m−2) corresponded to favorable growth conditions in 2007–2008. The mean 15N enrichment of copepods (+2.8–4.7‰) relative to particulate organic nitrogen values recorded at the ice bottom and at the chlorophyll maximum indicated a primarily herbivorous diet. In all species, δ 13C and δ 15N decreased markedly in April, reflecting the feeding onset on ice algae, but a rapid transition to feeding on phytoplankton occurred as a pelagic bloom was triggered by the early ice melt in May. A second decline in the δ 13C and δ 15N of copepods was recorded in June–July, coincident with a second increase in phytoplankton production. The two isotope depletion events in copepods were both followed by a return to high values and an increase in their C:N as a consequence of previous C fixation and nitrate limitation in phytoplankton and the likely formation of body reserves/tissue. Our results illustrate that Arctic calanoids respond quickly to any increase in primary production and can cope with changes in its nature and timing. |
format |
Text |
author |
Forest, Alexandre Galindo, Virginie Darnis, Gérald Pineault, Simon Lalande, Catherine Tremblay, Jean-Éric Fortier, Louis |
author_facet |
Forest, Alexandre Galindo, Virginie Darnis, Gérald Pineault, Simon Lalande, Catherine Tremblay, Jean-Éric Fortier, Louis |
author_sort |
Forest, Alexandre |
title |
Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) |
title_short |
Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) |
title_full |
Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) |
title_fullStr |
Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) |
title_full_unstemmed |
Carbon biomass, elemental ratios (C:N) and stable isotopic composition ({delta}13C, {delta}15N) of dominant calanoid copepods during the winter-to-summer transition in the Amundsen Gulf (Arctic Ocean) |
title_sort |
carbon biomass, elemental ratios (c:n) and stable isotopic composition ({delta}13c, {delta}15n) of dominant calanoid copepods during the winter-to-summer transition in the amundsen gulf (arctic ocean) |
publisher |
Oxford University Press |
publishDate |
2011 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/33/1/161 https://doi.org/10.1093/plankt/fbq103 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Amundsen Gulf Arctic Arctic Ocean Beaufort Sea Calanus glacialis Calanus hyperboreus ice algae Phytoplankton Copepods |
genre_facet |
Amundsen Gulf Arctic Arctic Ocean Beaufort Sea Calanus glacialis Calanus hyperboreus ice algae Phytoplankton Copepods |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/33/1/161 http://dx.doi.org/10.1093/plankt/fbq103 |
op_rights |
Copyright (C) 2011, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/fbq103 |
container_title |
Journal of Plankton Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
161 |
op_container_end_page |
178 |
_version_ |
1766368072864628736 |