Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset
Synchronous reproduction of birds has often been explained by benefits from nesting together, but this concept fails to explain observed intraspecific variation and climate-mediated changes of breeding synchrony. Here, we present a theoretical model of birds that store resources for reproduction (ca...
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The University of Chicago Press
2021
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Online Access: | https://hdl.handle.net/11250/2990728 https://doi.org/10.1086/716064 |
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ftunivbergen:oai:bora.uib.no:11250/2990728 2023-05-15T15:55:57+02:00 Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset Ejsmond, Anna Forchhammer, Mads Varpe, Øystein Jónsson, Jón Einar Jørgensen, Christian 2021 application/pdf https://hdl.handle.net/11250/2990728 https://doi.org/10.1086/716064 eng eng The University of Chicago Press urn:issn:0003-0147 https://hdl.handle.net/11250/2990728 https://doi.org/10.1086/716064 cristin:1929872 The American Naturalist. 2021, 198 (4), E122-E135. Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no Copyright 2021 The University of Chicago The American Naturalist E122-E135 198 4 VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1086/716064 2023-03-14T17:41:53Z Synchronous reproduction of birds has often been explained by benefits from nesting together, but this concept fails to explain observed intraspecific variation and climate-mediated changes of breeding synchrony. Here, we present a theoretical model of birds that store resources for reproduction (capital breeders) to show how breeding synchrony, clutch size, and offspring recruitment respond to changes in timing of first possible breeding date. Our approach is based on individual fitness maximization when both prebreeding foraging and offspring development are time constrained. The model predicts less synchronous breeding, smaller clutch size, and higher chances for offspring recruitment in capital breeding birds that advance their nesting. For contrast, we also show that birds that need to acquire resources during egg laying (income breeders) do not change nesting synchrony but increase clutch size along with earlier breeding. The prediction of stronger nesting synchronization of capital breeders in years with late nesting onset is confirmed by empirical data on breeding synchrony of a high-latitude capital breeding sea duck, the common eider (Somateria mollissima). We predict that in warming high-latitude ecosystems, bird species that depend on stored reserves for reproduction are expected to desynchronize their nesting. publishedVersion Article in Journal/Newspaper Common Eider Somateria mollissima University of Bergen: Bergen Open Research Archive (BORA-UiB) The American Naturalist 198 4 E122 E135 |
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Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Ejsmond, Anna Forchhammer, Mads Varpe, Øystein Jónsson, Jón Einar Jørgensen, Christian Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Synchronous reproduction of birds has often been explained by benefits from nesting together, but this concept fails to explain observed intraspecific variation and climate-mediated changes of breeding synchrony. Here, we present a theoretical model of birds that store resources for reproduction (capital breeders) to show how breeding synchrony, clutch size, and offspring recruitment respond to changes in timing of first possible breeding date. Our approach is based on individual fitness maximization when both prebreeding foraging and offspring development are time constrained. The model predicts less synchronous breeding, smaller clutch size, and higher chances for offspring recruitment in capital breeding birds that advance their nesting. For contrast, we also show that birds that need to acquire resources during egg laying (income breeders) do not change nesting synchrony but increase clutch size along with earlier breeding. The prediction of stronger nesting synchronization of capital breeders in years with late nesting onset is confirmed by empirical data on breeding synchrony of a high-latitude capital breeding sea duck, the common eider (Somateria mollissima). We predict that in warming high-latitude ecosystems, bird species that depend on stored reserves for reproduction are expected to desynchronize their nesting. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Ejsmond, Anna Forchhammer, Mads Varpe, Øystein Jónsson, Jón Einar Jørgensen, Christian |
author_facet |
Ejsmond, Anna Forchhammer, Mads Varpe, Øystein Jónsson, Jón Einar Jørgensen, Christian |
author_sort |
Ejsmond, Anna |
title |
Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset |
title_short |
Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset |
title_full |
Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset |
title_fullStr |
Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset |
title_full_unstemmed |
Nesting synchrony and clutch size in migratory birds: Capital versus income breeding determines responses to variable spring onset |
title_sort |
nesting synchrony and clutch size in migratory birds: capital versus income breeding determines responses to variable spring onset |
publisher |
The University of Chicago Press |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2990728 https://doi.org/10.1086/716064 |
genre |
Common Eider Somateria mollissima |
genre_facet |
Common Eider Somateria mollissima |
op_source |
The American Naturalist E122-E135 198 4 |
op_relation |
urn:issn:0003-0147 https://hdl.handle.net/11250/2990728 https://doi.org/10.1086/716064 cristin:1929872 The American Naturalist. 2021, 198 (4), E122-E135. |
op_rights |
Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no Copyright 2021 The University of Chicago |
op_doi |
https://doi.org/10.1086/716064 |
container_title |
The American Naturalist |
container_volume |
198 |
container_issue |
4 |
container_start_page |
E122 |
op_container_end_page |
E135 |
_version_ |
1766391426485059584 |