Why is timing of bird migration advancing when individuals are not?
Recent advances in spring arrival dates have been reported in many migratory species but the mechanism driving these advances is unknown. As population declines are most widely reported in species that are not advancing migration, there is an urgent need to identify the mechanisms facilitating and c...
| Main Authors: | , , , , , |
|---|---|
| Format: | Online |
| Language: | English |
| Published: |
The Royal Society
2014
|
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3843828/ |
| id |
pubmed-3843828 |
|---|---|
| recordtype |
oai_dc |
| spelling |
pubmed-38438282014-01-07 Why is timing of bird migration advancing when individuals are not? Gill, Jennifer A. Alves, José A. Sutherland, William J. Appleton, Graham F. Potts, Peter M. Gunnarsson, Tómas G. Research Articles Recent advances in spring arrival dates have been reported in many migratory species but the mechanism driving these advances is unknown. As population declines are most widely reported in species that are not advancing migration, there is an urgent need to identify the mechanisms facilitating and constraining these advances. Individual plasticity in timing of migration in response to changing climatic conditions is commonly proposed to drive these advances but plasticity in individual migratory timings is rarely observed. For a shorebird population that has significantly advanced migration in recent decades, we show that individual arrival dates are highly consistent between years, but that the arrival dates of new recruits to the population are significantly earlier now than in previous years. Several mechanisms could drive advances in recruit arrival, none of which require individual plasticity or rapid evolution of migration timings. In particular, advances in nest-laying dates could result in advanced recruit arrival, if benefits of early hatching facilitate early subsequent spring migration. This mechanism could also explain why arrival dates of short-distance migrants, which generally return to breeding sites earlier and have greater scope for advance laying, are advancing more rapidly than long-distance migrants. The Royal Society 2014-01-07 /pmc/articles/PMC3843828/ /pubmed/24225454 http://dx.doi.org/10.1098/rspb.2013.2161 Text en http://creativecommons.org/licenses/by/3.0/ © 2013 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited. |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Gill, Jennifer A. Alves, José A. Sutherland, William J. Appleton, Graham F. Potts, Peter M. Gunnarsson, Tómas G. |
| spellingShingle |
Gill, Jennifer A. Alves, José A. Sutherland, William J. Appleton, Graham F. Potts, Peter M. Gunnarsson, Tómas G. Why is timing of bird migration advancing when individuals are not? |
| author_facet |
Gill, Jennifer A. Alves, José A. Sutherland, William J. Appleton, Graham F. Potts, Peter M. Gunnarsson, Tómas G. |
| author_sort |
Gill, Jennifer A. |
| title |
Why is timing of bird migration advancing when individuals are not? |
| title_short |
Why is timing of bird migration advancing when individuals are not? |
| title_full |
Why is timing of bird migration advancing when individuals are not? |
| title_fullStr |
Why is timing of bird migration advancing when individuals are not? |
| title_full_unstemmed |
Why is timing of bird migration advancing when individuals are not? |
| title_sort |
why is timing of bird migration advancing when individuals are not? |
| description |
Recent advances in spring arrival dates have been reported in many migratory species but the mechanism driving these advances is unknown. As population declines are most widely reported in species that are not advancing migration, there is an urgent need to identify the mechanisms facilitating and constraining these advances. Individual plasticity in timing of migration in response to changing climatic conditions is commonly proposed to drive these advances but plasticity in individual migratory timings is rarely observed. For a shorebird population that has significantly advanced migration in recent decades, we show that individual arrival dates are highly consistent between years, but that the arrival dates of new recruits to the population are significantly earlier now than in previous years. Several mechanisms could drive advances in recruit arrival, none of which require individual plasticity or rapid evolution of migration timings. In particular, advances in nest-laying dates could result in advanced recruit arrival, if benefits of early hatching facilitate early subsequent spring migration. This mechanism could also explain why arrival dates of short-distance migrants, which generally return to breeding sites earlier and have greater scope for advance laying, are advancing more rapidly than long-distance migrants. |
| publisher |
The Royal Society |
| publishDate |
2014 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3843828/ |
| _version_ |
1612031777491124224 |