Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa
The increase in atmospheric CO2 concentrations caused by anthropogenic activities could lead to aragonite (polymorph of calcium carbonate) sub-saturation in parts of the Arctic surface ocean by 2020 if emissions follow business as usual scenarios. Most pronounced effects are expected to take place d...
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ftoceanrep:oai:oceanrep.geomar.de:12324 2023-05-15T14:53:02+02:00 Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa Büdenbender, Jan Lischka, Silke Schulz, Kai Riebesell, Ulf 2011 https://oceanrep.geomar.de/id/eprint/12324/ unknown Büdenbender, J., Lischka, S. , Schulz, K. and Riebesell, U. (2011) Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa. [Poster] In: EGU General Assembly 2011. , 03.-08.04.2011, Vienna, Austria . Conference or Workshop Item NonPeerReviewed 2011 ftoceanrep 2023-04-07T15:00:40Z The increase in atmospheric CO2 concentrations caused by anthropogenic activities could lead to aragonite (polymorph of calcium carbonate) sub-saturation in parts of the Arctic surface ocean by 2020 if emissions follow business as usual scenarios. Most pronounced effects are expected to take place during winter-time. Sub-saturated water was shown to negatively impact a variety of marine calcifying organisms. The polar calcifying pteropod Limacina helicina can contribute up to 20% of the Arctic zooplankton biomass at times and has a key function in the Arctic epipelagic food web. The temperate-boreal sibling species L. retroversa is frequently introduced to Arctic regions with Atlantic water masses. Both species contribute significantly to vertical carbon flux. In September/October 2009 and in January/February 2010 incubation experiments were carried out in Ny Ålesund/Svalbard at three temperatures (3, 5 and 8°C) and four pCO2 levels (180, 400, 750 and 1150 ppm) with durations of 29 and 9 days, respectively. In the 2009 experiment we used a novel approach of a 13C stable isotope incubation for measuring pteropod calcification rates. First results show that 13C concentrations varied in the total particulate carbon (TPC) of the organism but stayed constant in the particulate organic carbon (POC). From mass-balance calculations the variation in the TP13C concentrations result from 13C concentration changes of the particulate inorganic carbon (PIC) and/or changing PIC/POC ratios. The first is most likely affected by different calcification rates whereas the second could be additionally affected by changing respiration rates in response to the applied treatments. Our results show trends of 13C enrichment in organisms with increasing temperature and with decreasing pCO2 levels, suggesting a positive temperature and a negative CO2 effect on pteropod calcification rates. To investigate species-specific differences, in winter 2010 (January/February) temperature and CO2 perturbation experiments were carried out with ... Conference Object Arctic Limacina helicina Ny Ålesund Ny-Ålesund Ocean acidification Svalbard Zooplankton OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Ny-Ålesund Svalbard |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
unknown |
description |
The increase in atmospheric CO2 concentrations caused by anthropogenic activities could lead to aragonite (polymorph of calcium carbonate) sub-saturation in parts of the Arctic surface ocean by 2020 if emissions follow business as usual scenarios. Most pronounced effects are expected to take place during winter-time. Sub-saturated water was shown to negatively impact a variety of marine calcifying organisms. The polar calcifying pteropod Limacina helicina can contribute up to 20% of the Arctic zooplankton biomass at times and has a key function in the Arctic epipelagic food web. The temperate-boreal sibling species L. retroversa is frequently introduced to Arctic regions with Atlantic water masses. Both species contribute significantly to vertical carbon flux. In September/October 2009 and in January/February 2010 incubation experiments were carried out in Ny Ålesund/Svalbard at three temperatures (3, 5 and 8°C) and four pCO2 levels (180, 400, 750 and 1150 ppm) with durations of 29 and 9 days, respectively. In the 2009 experiment we used a novel approach of a 13C stable isotope incubation for measuring pteropod calcification rates. First results show that 13C concentrations varied in the total particulate carbon (TPC) of the organism but stayed constant in the particulate organic carbon (POC). From mass-balance calculations the variation in the TP13C concentrations result from 13C concentration changes of the particulate inorganic carbon (PIC) and/or changing PIC/POC ratios. The first is most likely affected by different calcification rates whereas the second could be additionally affected by changing respiration rates in response to the applied treatments. Our results show trends of 13C enrichment in organisms with increasing temperature and with decreasing pCO2 levels, suggesting a positive temperature and a negative CO2 effect on pteropod calcification rates. To investigate species-specific differences, in winter 2010 (January/February) temperature and CO2 perturbation experiments were carried out with ... |
format |
Conference Object |
author |
Büdenbender, Jan Lischka, Silke Schulz, Kai Riebesell, Ulf |
spellingShingle |
Büdenbender, Jan Lischka, Silke Schulz, Kai Riebesell, Ulf Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa |
author_facet |
Büdenbender, Jan Lischka, Silke Schulz, Kai Riebesell, Ulf |
author_sort |
Büdenbender, Jan |
title |
Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa |
title_short |
Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa |
title_full |
Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa |
title_fullStr |
Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa |
title_full_unstemmed |
Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa |
title_sort |
pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter limacina helicina and effects on overwintering l. helicina and l. retroversa |
publishDate |
2011 |
url |
https://oceanrep.geomar.de/id/eprint/12324/ |
geographic |
Arctic Ny-Ålesund Svalbard |
geographic_facet |
Arctic Ny-Ålesund Svalbard |
genre |
Arctic Limacina helicina Ny Ålesund Ny-Ålesund Ocean acidification Svalbard Zooplankton |
genre_facet |
Arctic Limacina helicina Ny Ålesund Ny-Ålesund Ocean acidification Svalbard Zooplankton |
op_relation |
Büdenbender, J., Lischka, S. , Schulz, K. and Riebesell, U. (2011) Pteropods under the impact of ocean acidification and warming: a novel approach of calcification rate measurements in pre-winter Limacina helicina and effects on overwintering L. helicina and L. retroversa. [Poster] In: EGU General Assembly 2011. , 03.-08.04.2011, Vienna, Austria . |
_version_ |
1766324462832058368 |