Some like it hot - Calanus in Disko Bay
The ongoing temperature increase in the Arctic affects the succession patterns in the marine pelagic ecosystem. Reduction and earlier breakup of sea ice changes the initiation of the spring bloom. Along the Greenland coast three species of Calanus dominate the zooplankton; C. hyperboreus, C. glacial...
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ftdtupubl:oai:pure.atira.dk:publications/e44bfe60-c0f9-465e-a89f-379d0e7acd6c 2023-12-24T10:13:56+01:00 Some like it hot - Calanus in Disko Bay Nielsen, Torkel Gissel Jung-Madsen, Signe Møller, Eva Friis 2015 https://orbit.dtu.dk/en/publications/e44bfe60-c0f9-465e-a89f-379d0e7acd6c eng eng https://orbit.dtu.dk/en/publications/e44bfe60-c0f9-465e-a89f-379d0e7acd6c info:eu-repo/semantics/restrictedAccess Nielsen , T G , Jung-Madsen , S & Møller , E F 2015 , ' Some like it hot - Calanus in Disko Bay ' , ESSAS Annual Science Meeting , Seattle , United States , 15/06/2015 - 17/06/2015 . /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water conferenceObject 2015 ftdtupubl 2023-11-30T00:00:36Z The ongoing temperature increase in the Arctic affects the succession patterns in the marine pelagic ecosystem. Reduction and earlier breakup of sea ice changes the initiation of the spring bloom. Along the Greenland coast three species of Calanus dominate the zooplankton; C. hyperboreus, C. glacialis and C. finmarchicus. C. hyperboreus and C. glacialis are large lipid rich Arctic species, whereas C. finmarchicus is a smaller North Atlantic species. During the last two decades we have investigated the Calanus community in the Disko Bay, western Greenland. Calanus are impacted by the environmental changes, directly through their physiological rates as egg production, development, growth, and metabolic cost and indirectly via the environment through changes in ice cover, salinity, and food availability. The Calanus species have different lifecycles and show different responses to increasing temperatures. The aim of this talk is to discuss possible effects of climate change on coexisting Calanus species. Our result from in situ and laboratory studies illustrates that Calanus in Disko Bay are well adapted to Arctic conditions with unpredictable pulses of food. All three species continue reproduction when starved. Pre-feeding history of C. glacialis and C. finmarchicus are important to the starvation response as it affects gonad maturation. Only C. finmarchicus that have previously fed will continue egg production during starvation, unlike C. glacialis that sustain egg production without food. This advantage however diminishes with increasing temperature. At temperatures above 5 °C both starved and fed C. finmarchicus can produce egg at a rate similar to C. glacialis. The reproduction by the winter spawner C. hyperboreus seemed to be endogenously controlled, as neither food nor temperature affect reproductive output. The eggs of C. hyperboreus develop relatively fast at low temperature, and nauplii can survive long periods of starvation Conference Object Arctic Climate change Disko Bay Greenland North Atlantic Sea ice Zooplankton Technical University of Denmark: DTU Orbit Arctic Greenland |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Nielsen, Torkel Gissel Jung-Madsen, Signe Møller, Eva Friis Some like it hot - Calanus in Disko Bay |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
The ongoing temperature increase in the Arctic affects the succession patterns in the marine pelagic ecosystem. Reduction and earlier breakup of sea ice changes the initiation of the spring bloom. Along the Greenland coast three species of Calanus dominate the zooplankton; C. hyperboreus, C. glacialis and C. finmarchicus. C. hyperboreus and C. glacialis are large lipid rich Arctic species, whereas C. finmarchicus is a smaller North Atlantic species. During the last two decades we have investigated the Calanus community in the Disko Bay, western Greenland. Calanus are impacted by the environmental changes, directly through their physiological rates as egg production, development, growth, and metabolic cost and indirectly via the environment through changes in ice cover, salinity, and food availability. The Calanus species have different lifecycles and show different responses to increasing temperatures. The aim of this talk is to discuss possible effects of climate change on coexisting Calanus species. Our result from in situ and laboratory studies illustrates that Calanus in Disko Bay are well adapted to Arctic conditions with unpredictable pulses of food. All three species continue reproduction when starved. Pre-feeding history of C. glacialis and C. finmarchicus are important to the starvation response as it affects gonad maturation. Only C. finmarchicus that have previously fed will continue egg production during starvation, unlike C. glacialis that sustain egg production without food. This advantage however diminishes with increasing temperature. At temperatures above 5 °C both starved and fed C. finmarchicus can produce egg at a rate similar to C. glacialis. The reproduction by the winter spawner C. hyperboreus seemed to be endogenously controlled, as neither food nor temperature affect reproductive output. The eggs of C. hyperboreus develop relatively fast at low temperature, and nauplii can survive long periods of starvation |
format |
Conference Object |
author |
Nielsen, Torkel Gissel Jung-Madsen, Signe Møller, Eva Friis |
author_facet |
Nielsen, Torkel Gissel Jung-Madsen, Signe Møller, Eva Friis |
author_sort |
Nielsen, Torkel Gissel |
title |
Some like it hot - Calanus in Disko Bay |
title_short |
Some like it hot - Calanus in Disko Bay |
title_full |
Some like it hot - Calanus in Disko Bay |
title_fullStr |
Some like it hot - Calanus in Disko Bay |
title_full_unstemmed |
Some like it hot - Calanus in Disko Bay |
title_sort |
some like it hot - calanus in disko bay |
publishDate |
2015 |
url |
https://orbit.dtu.dk/en/publications/e44bfe60-c0f9-465e-a89f-379d0e7acd6c |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Disko Bay Greenland North Atlantic Sea ice Zooplankton |
genre_facet |
Arctic Climate change Disko Bay Greenland North Atlantic Sea ice Zooplankton |
op_source |
Nielsen , T G , Jung-Madsen , S & Møller , E F 2015 , ' Some like it hot - Calanus in Disko Bay ' , ESSAS Annual Science Meeting , Seattle , United States , 15/06/2015 - 17/06/2015 . |
op_relation |
https://orbit.dtu.dk/en/publications/e44bfe60-c0f9-465e-a89f-379d0e7acd6c |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1786187536315449344 |