Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms

During evolution, a wide range of organisms from cyanobacteria to humans have adapted to the day-night cycle, caused by the earth’s rotational movements, by developing an endogenous timing system – a circadian clock – that allows synchronization of metabolism, physiology and behaviour with the envir...

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Main Authors: Meyer, Bettina, Teschke, Mathias, Kawaguchi, So
Format: Conference Object
Language:unknown
Published: 2014
Subjects:
Online Access:https://epic.awi.de/id/eprint/37529/
https://hdl.handle.net/10013/epic.45237
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spelling ftawi:oai:epic.awi.de:37529 2023-05-15T13:45:22+02:00 Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms Meyer, Bettina Teschke, Mathias Kawaguchi, So 2014 https://epic.awi.de/id/eprint/37529/ https://hdl.handle.net/10013/epic.45237 unknown Meyer, B. orcid:0000-0001-6804-9896 , Teschke, M. and Kawaguchi, S. (2014) Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms , XIth SCAR Biological Symposium, Barcelona, Spain, 15 July 2013 - 19 July 2013 . hdl:10013/epic.45237 EPIC3XIth SCAR Biological Symposium, Barcelona, Spain, 2013-07-15-2013-07-19Barcelona, Spain Conference notRev 2014 ftawi 2022-10-02T23:12:33Z During evolution, a wide range of organisms from cyanobacteria to humans have adapted to the day-night cycle, caused by the earth’s rotational movements, by developing an endogenous timing system – a circadian clock – that allows synchronization of metabolism, physiology and behaviour with the environment and that also may modulate seasonal responses. Our current molecular understanding of biological rhythms and clocks is largely restricted to circadian and seasonal rhythms in land model species such as the fruit fly, the mouse or the thale cress. In marine organisms in general, little is known about the principles of endogenous clocks and how these clocks interact with environmental cycles. Marine ecosystems are currently experiencing rapid anthropogenic climatic changes. In particular, polar and sub-polar latitudes comprise the fastest warming regions on the planet with profound impacts on the marine environment. I will outline the importance of this research field in polar regions on the Southern Ocean key species Antarctic krill, Euphausia superba. Our seasonal investigations on krill, both field based and in the laboratory, revealed that important physiological functions such as metabolic activity, feeding and growth, as well as maturity are affected by different light-dark cycles, irrespective of food supply, suggesting that the photoperiod acts as the main Zeitgeber for these annual cycles. In recent investigations we identified an endogenous timing system, which is synchronized by the seasonal cycle of photoperiod, and its link to metabolic key processes. We will further outline the implication of these findings for krill stocks in a changing environment and will present a recently started 5 years project on clocks and rhythms in polar pelagic organisms. Conference Object Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean
institution Open Polar
collection Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
op_collection_id ftawi
language unknown
description During evolution, a wide range of organisms from cyanobacteria to humans have adapted to the day-night cycle, caused by the earth’s rotational movements, by developing an endogenous timing system – a circadian clock – that allows synchronization of metabolism, physiology and behaviour with the environment and that also may modulate seasonal responses. Our current molecular understanding of biological rhythms and clocks is largely restricted to circadian and seasonal rhythms in land model species such as the fruit fly, the mouse or the thale cress. In marine organisms in general, little is known about the principles of endogenous clocks and how these clocks interact with environmental cycles. Marine ecosystems are currently experiencing rapid anthropogenic climatic changes. In particular, polar and sub-polar latitudes comprise the fastest warming regions on the planet with profound impacts on the marine environment. I will outline the importance of this research field in polar regions on the Southern Ocean key species Antarctic krill, Euphausia superba. Our seasonal investigations on krill, both field based and in the laboratory, revealed that important physiological functions such as metabolic activity, feeding and growth, as well as maturity are affected by different light-dark cycles, irrespective of food supply, suggesting that the photoperiod acts as the main Zeitgeber for these annual cycles. In recent investigations we identified an endogenous timing system, which is synchronized by the seasonal cycle of photoperiod, and its link to metabolic key processes. We will further outline the implication of these findings for krill stocks in a changing environment and will present a recently started 5 years project on clocks and rhythms in polar pelagic organisms.
format Conference Object
author Meyer, Bettina
Teschke, Mathias
Kawaguchi, So
spellingShingle Meyer, Bettina
Teschke, Mathias
Kawaguchi, So
Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms
author_facet Meyer, Bettina
Teschke, Mathias
Kawaguchi, So
author_sort Meyer, Bettina
title Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms
title_short Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms
title_full Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms
title_fullStr Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms
title_full_unstemmed Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms
title_sort biological timing in a changing marine environment: clocks and rhythms in polar pelagic organisms
publishDate 2014
url https://epic.awi.de/id/eprint/37529/
https://hdl.handle.net/10013/epic.45237
geographic Antarctic
Southern Ocean
geographic_facet Antarctic
Southern Ocean
genre Antarc*
Antarctic
Antarctic Krill
Euphausia superba
Southern Ocean
genre_facet Antarc*
Antarctic
Antarctic Krill
Euphausia superba
Southern Ocean
op_source EPIC3XIth SCAR Biological Symposium, Barcelona, Spain, 2013-07-15-2013-07-19Barcelona, Spain
op_relation Meyer, B. orcid:0000-0001-6804-9896 , Teschke, M. and Kawaguchi, S. (2014) Biological timing in a changing marine environment: Clocks and rhythms in polar pelagic organisms , XIth SCAR Biological Symposium, Barcelona, Spain, 15 July 2013 - 19 July 2013 . hdl:10013/epic.45237
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