Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird
The high Arctic archipelago of Svalbard (74°–81° north) experiences extended periods of uninterrupted daylight in summer and uninterrupted night in winter, apparently relaxing the major driver for the evolution of circadian rhythmicity. Svalbard ptarmigan ( Lagopus muta hyperborea ) is the only year...
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Online Access: | https://hdl.handle.net/10037/24228 https://doi.org/10.1016/j.cub.2021.04.009 |
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ftunivtroemsoe:oai:munin.uit.no:10037/24228 2023-05-15T14:28:53+02:00 Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird Appenroth, Daniel Wagner, Gabriela Hazlerigg, David West, Alexander Christopher 2021-04-29 https://hdl.handle.net/10037/24228 https://doi.org/10.1016/j.cub.2021.04.009 eng eng Elsevier Current Biology Tromsø forskningsstiftelse: TFS2016DH Andre: Human Frontiers Science Program (RGP0030/2015) Appenroth D, Wagner G, Hazlerigg D, West AC. Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird. Current Biology. 2021;31(12):2720-2727 FRIDAID 1963125 doi:10.1016/j.cub.2021.04.009 0960-9822 1879-0445 https://hdl.handle.net/10037/24228 embargoedAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2021 ftunivtroemsoe https://doi.org/10.1016/j.cub.2021.04.009 2022-03-02T23:57:50Z The high Arctic archipelago of Svalbard (74°–81° north) experiences extended periods of uninterrupted daylight in summer and uninterrupted night in winter, apparently relaxing the major driver for the evolution of circadian rhythmicity. Svalbard ptarmigan ( Lagopus muta hyperborea ) is the only year-round resident terrestrial bird species endemic to the high Arctic and is remarkably adapted to the extreme annual variation in environmental conditions. Here, we demonstrate that, although circadian control of behavior disappears rapidly upon transfer to constant light conditions, consistent with the loss of daily activity patterns observed during the polar summer and polar night, Svalbard ptarmigans nonetheless employ a circadian-based mechanism for photoperiodic timekeeping. First, we show the persistence of rhythmic clock gene expression under constant light within the mediobasal hypothalamus and pars tuberalis, the key tissues in the seasonal neuroendocrine cascade. We then employ a “sliding skeleton photoperiod” protocol, revealing that the driving force behind seasonal biology of the Svalbard ptarmigan is rhythmic sensitivity to light, a feature that depends on a functioning circadian rhythm. Hence, the unusual selective pressures of life in the high Arctic have favored decoupling of the circadian clock from organization of daily activity patterns, while preserving its importance for seasonal synchronization. Article in Journal/Newspaper Arctic Archipelago Arctic Lagopus muta Lagopus muta hyperborea polar night Svalbard University of Tromsø: Munin Open Research Archive Arctic Svalbard Current Biology 31 12 2720 2727.e5 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 Appenroth, Daniel Wagner, Gabriela Hazlerigg, David West, Alexander Christopher Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 |
description |
The high Arctic archipelago of Svalbard (74°–81° north) experiences extended periods of uninterrupted daylight in summer and uninterrupted night in winter, apparently relaxing the major driver for the evolution of circadian rhythmicity. Svalbard ptarmigan ( Lagopus muta hyperborea ) is the only year-round resident terrestrial bird species endemic to the high Arctic and is remarkably adapted to the extreme annual variation in environmental conditions. Here, we demonstrate that, although circadian control of behavior disappears rapidly upon transfer to constant light conditions, consistent with the loss of daily activity patterns observed during the polar summer and polar night, Svalbard ptarmigans nonetheless employ a circadian-based mechanism for photoperiodic timekeeping. First, we show the persistence of rhythmic clock gene expression under constant light within the mediobasal hypothalamus and pars tuberalis, the key tissues in the seasonal neuroendocrine cascade. We then employ a “sliding skeleton photoperiod” protocol, revealing that the driving force behind seasonal biology of the Svalbard ptarmigan is rhythmic sensitivity to light, a feature that depends on a functioning circadian rhythm. Hence, the unusual selective pressures of life in the high Arctic have favored decoupling of the circadian clock from organization of daily activity patterns, while preserving its importance for seasonal synchronization. |
format |
Article in Journal/Newspaper |
author |
Appenroth, Daniel Wagner, Gabriela Hazlerigg, David West, Alexander Christopher |
author_facet |
Appenroth, Daniel Wagner, Gabriela Hazlerigg, David West, Alexander Christopher |
author_sort |
Appenroth, Daniel |
title |
Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird |
title_short |
Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird |
title_full |
Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird |
title_fullStr |
Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird |
title_full_unstemmed |
Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird |
title_sort |
evidence for circadian-based photoperiodic timekeeping in svalbard ptarmigan, the northernmost resident bird |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/24228 https://doi.org/10.1016/j.cub.2021.04.009 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Archipelago Arctic Lagopus muta Lagopus muta hyperborea polar night Svalbard |
genre_facet |
Arctic Archipelago Arctic Lagopus muta Lagopus muta hyperborea polar night Svalbard |
op_relation |
Current Biology Tromsø forskningsstiftelse: TFS2016DH Andre: Human Frontiers Science Program (RGP0030/2015) Appenroth D, Wagner G, Hazlerigg D, West AC. Evidence for circadian-based photoperiodic timekeeping in Svalbard ptarmigan, the northernmost resident bird. Current Biology. 2021;31(12):2720-2727 FRIDAID 1963125 doi:10.1016/j.cub.2021.04.009 0960-9822 1879-0445 https://hdl.handle.net/10037/24228 |
op_rights |
embargoedAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1016/j.cub.2021.04.009 |
container_title |
Current Biology |
container_volume |
31 |
container_issue |
12 |
container_start_page |
2720 |
op_container_end_page |
2727.e5 |
_version_ |
1766303021516455936 |