Response of an Afro-Palearctic bird migrant to glaciation cycles.
Proc Natl Acad Sci U S A
Proceedings of the National Academy of Sciences
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Thorup, K., Pedersen, L., da Fonseca, R. R., Naimi, B., Nogués-Bravo, D., Krapp, M., Manica, A., et al. (2021). Response of an Afro-Palearctic bird migrant to glaciation cycles.. Proc Natl Acad Sci U S A, 118 (52), e2023836118-e2023836118. https://doi.org/10.1073/pnas.2023836118
Migration allows animals to exploit spatially separated and seasonally available resources at a continental to global scale. However, responding to global climatic changes might prove challenging, especially for long-distance intercontinental migrants. During glacial periods, when conditions became too harsh for breeding in the north, avian migrants have been hypothesized to retract their distribution to reside within small refugial areas. Here, we present data showing that an Afro-Palearctic migrant continued seasonal migration, largely within Africa, during previous glacial-interglacial cycles with no obvious impact on population size. Using individual migratory track data to hindcast monthly bioclimatic habitat availability maps through the last 120,000 y, we show altered seasonal use of suitable areas through time. Independently derived effective population sizes indicate a growing population through the last 40,000 y. We conclude that the migratory lifestyle enabled adaptation to shifting climate conditions. This indicates that populations of resource-tracking, long-distance migratory species could expand successfully during warming periods in the past, which could also be the case under future climate scenarios.
effective population size, hindcasting, long-distance migration, paleoclimate reconstruction
External DOI: https://doi.org/10.1073/pnas.2023836118
This record's URL: https://www.repository.cam.ac.uk/handle/1810/332595
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/