The impact of seasonal regulation of metabolism on the life history of Antarctic krill
Antarctic krill up- and down-regulate their metabolism as a strategy to cope with the strong seasonal environmental fluctuations in the Southern Ocean. In this study, we investigate the impact of this light- and temperature dependent metabolic regulation on growth, reproduction and winter survival o...
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ftawi:oai:epic.awi.de:53559 2024-09-15T17:40:50+00:00 The impact of seasonal regulation of metabolism on the life history of Antarctic krill Bahlburg, Dominik Meyer, Bettina Berger, Uta 2021-01-04 application/pdf https://epic.awi.de/id/eprint/53559/ https://epic.awi.de/id/eprint/53559/1/Bahlburgetal2021.pdf https://doi.org/10.1016/j.ecolmodel.2021.109427 https://hdl.handle.net/10013/epic.7f02f4b6-25a0-4c62-8e22-921d132d689f unknown ELSEVIER SCIENCE BV https://epic.awi.de/id/eprint/53559/1/Bahlburgetal2021.pdf Bahlburg, D. , Meyer, B. orcid:0000-0001-6804-9896 and Berger, U. (2021) The impact of seasonal regulation of metabolism on the life history of Antarctic krill , Ecological Modelling, 442 . doi:10.1016/j.ecolmodel.2021.109427 <https://doi.org/10.1016/j.ecolmodel.2021.109427> , hdl:10013/epic.7f02f4b6-25a0-4c62-8e22-921d132d689f EPIC3Ecological Modelling, ELSEVIER SCIENCE BV, 442, ISSN: 0304-3800 Article isiRev 2021 ftawi https://doi.org/10.1016/j.ecolmodel.2021.109427 2024-06-24T04:26:11Z Antarctic krill up- and down-regulate their metabolism as a strategy to cope with the strong seasonal environmental fluctuations in the Southern Ocean. In this study, we investigate the impact of this light- and temperature dependent metabolic regulation on growth, reproduction and winter survival of krill. Therefore, we advance a bioenergetic growth model of krill by adding a data-derived scaling function of krill activity. With SERBIK (SEasonally Regulated BIoenergetic Krill growth model), we conduct a numerical experiment which tests the impact of such scaling on krill life history under two different winter food conditions: In the first scenario, we simulate life history of krill when winter food availability is low; in the second scenario, winter food availability is increased within realistic ranges. The results demonstrate that the scaling of metabolism is especially important during low food winters. Reducing metabolism during winter permits individuals to grow to larger body length, reproduce successfully and release a greater number of eggs. It further significantly reduces withinyear size fluctuations caused by starvation during months with low food availability. Finally, SERBIK can be used in future spatial modelling studies which include movement of krill along latitudinal gradients and thus spatiotemporal gradients in light- and temperature. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Ecological Modelling 442 109427 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Antarctic krill up- and down-regulate their metabolism as a strategy to cope with the strong seasonal environmental fluctuations in the Southern Ocean. In this study, we investigate the impact of this light- and temperature dependent metabolic regulation on growth, reproduction and winter survival of krill. Therefore, we advance a bioenergetic growth model of krill by adding a data-derived scaling function of krill activity. With SERBIK (SEasonally Regulated BIoenergetic Krill growth model), we conduct a numerical experiment which tests the impact of such scaling on krill life history under two different winter food conditions: In the first scenario, we simulate life history of krill when winter food availability is low; in the second scenario, winter food availability is increased within realistic ranges. The results demonstrate that the scaling of metabolism is especially important during low food winters. Reducing metabolism during winter permits individuals to grow to larger body length, reproduce successfully and release a greater number of eggs. It further significantly reduces withinyear size fluctuations caused by starvation during months with low food availability. Finally, SERBIK can be used in future spatial modelling studies which include movement of krill along latitudinal gradients and thus spatiotemporal gradients in light- and temperature. |
format |
Article in Journal/Newspaper |
author |
Bahlburg, Dominik Meyer, Bettina Berger, Uta |
spellingShingle |
Bahlburg, Dominik Meyer, Bettina Berger, Uta The impact of seasonal regulation of metabolism on the life history of Antarctic krill |
author_facet |
Bahlburg, Dominik Meyer, Bettina Berger, Uta |
author_sort |
Bahlburg, Dominik |
title |
The impact of seasonal regulation of metabolism on the life history of Antarctic krill |
title_short |
The impact of seasonal regulation of metabolism on the life history of Antarctic krill |
title_full |
The impact of seasonal regulation of metabolism on the life history of Antarctic krill |
title_fullStr |
The impact of seasonal regulation of metabolism on the life history of Antarctic krill |
title_full_unstemmed |
The impact of seasonal regulation of metabolism on the life history of Antarctic krill |
title_sort |
impact of seasonal regulation of metabolism on the life history of antarctic krill |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/53559/ https://epic.awi.de/id/eprint/53559/1/Bahlburgetal2021.pdf https://doi.org/10.1016/j.ecolmodel.2021.109427 https://hdl.handle.net/10013/epic.7f02f4b6-25a0-4c62-8e22-921d132d689f |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_source |
EPIC3Ecological Modelling, ELSEVIER SCIENCE BV, 442, ISSN: 0304-3800 |
op_relation |
https://epic.awi.de/id/eprint/53559/1/Bahlburgetal2021.pdf Bahlburg, D. , Meyer, B. orcid:0000-0001-6804-9896 and Berger, U. (2021) The impact of seasonal regulation of metabolism on the life history of Antarctic krill , Ecological Modelling, 442 . doi:10.1016/j.ecolmodel.2021.109427 <https://doi.org/10.1016/j.ecolmodel.2021.109427> , hdl:10013/epic.7f02f4b6-25a0-4c62-8e22-921d132d689f |
op_doi |
https://doi.org/10.1016/j.ecolmodel.2021.109427 |
container_title |
Ecological Modelling |
container_volume |
442 |
container_start_page |
109427 |
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1810486879455281152 |