2026-04-13T04:57:50Zhttps://recercat.cat/oai/requestoai:recercat.cat:2072/5340832024-12-23T14:53:16Zcom_2072_352787com_2072_351515com_2072_1741col_2072_352789
RECERCAT
author
Halupka, Lucyna
author
Senar, Juan Carlos
author
Halupk, Konrad
2023-05-09T10:38:50Z2024-07-29T07:30:58Z
2023-05-09T10:38:50Z2024-07-29T07:30:58Z
2023-03-22
http://hdl.handle.net/2072/534083
https://doi.org/10.1073/pnas.2208389120
Climate change affects timing of reproduction in many bird species, but few studies
have investigated its influence on annual reproductive output. Here, we assess
changes in the annual production of young by female breeders in 201 populations
of 104 bird species (N = 745,962 clutches) covering all continents between 1970
and 2019. Overall, average offspring production has declined in recent decades,
but considerable differences were found among species and populations. A total of
56.7% of populations showed a declining trend in offspring production (significant
in 17.4%), whereas 43.3% exhibited an increase (significant in 10.4%). The results
show that climatic changes affect offspring production through compounded effects
on ecological and life history traits of species. Migratory and larger-bodied species
experienced reduced offspring production with increasing temperatures during the
chick-rearing period, whereas smaller-bodied, sedentary species tended to produce
more offspring. Likewise, multi-brooded species showed increased breeding success
with increasing temperatures, whereas rising temperatures were unrelated to reproductive
success in single-brooded species. Our study suggests that rapid declines in
size of bird populations reported by many studies from different parts of the world
are driven only to a small degree by changes in the production of young.
eng
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright © 2023 the Author(s). Published by PNAS
The effect of climate change on avian offspring production: a global meta-analysis
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