Arlt, Debora
- Institutionen för ekologi, Sveriges lantbruksuniversitet
- SLU Artdatabanken, Sveriges lantbruksuniversitet
Sammanfattning
Climate change affects timing of reproduction in many bird species, but few stud-ies 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 repro-ductive 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.
Nyckelord
climate change; birds; offspring production; meta-analysis
Publicerad i
Proceedings of the National Academy of Sciences of the United States of America
2023, volym: 120, nummer: 19, artikelnummer: e2208389120
Utgivare: NATL ACAD SCIENCES
SLU författare
UKÄ forskningsämne
Ekologi
Miljövetenskap
Publikationens identifierare
- DOI: https://doi.org/10.1073/pnas.2208389120
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/124718