Abstract
The current ecological crisis has risen extinction rates to similar levels of ancient mass extinctions. However, it seems to not be acting uniformly across all species but affecting species differentially. This suggests that species’ susceptibility to the extinction process is mediated by specific traits. Since understanding this response mechanism at large scales will benefit conservation effort around the world, we used the IUCN global threat status and population trends of 8281 extant bird species as proxies of the extinction risk to identify the species-specific traits affecting their susceptibility to extinction within the biogeographic regions and at the global scale. Using linear mixed effect models and multinomial models, we related the global threat status and the population trends with the following traits: migratory strategy, habitat and diet specialization, body size, and generation length. According to our results and independently of the proxy used, more vulnerable species are sedentary and have larger body size, longer generation time, and higher degree of habitat specialization. These relationships apply globally and show little variation across biogeographic regions. We suggest that such concordant patterns might be caused either by a widespread occurrence of the same threats such as habitat modification or by a uniform capacity of some traits to reflect the impact of different local threats. Regardless of the cause of this pattern, our study identified the traits that affect species’ response capability to the current ecological crisis. Conservation effort should focus on the species with trait values indicating the limited response capacity to overcome this crisis.
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Acknowledgements
We would like to thank BirdLife International for publishing the data as well as the IUCN and the HBW Alive for allowing us to build up the dataset. Furthermore, special mention to Pavle Krsmanovic and Laura Albea Crivicich for their inestimable help during the construction of the dataset.
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The study was funded by the Czech Science Foundation (project no. 20-00648S) and the Charles University (project no. UNCE/SCI/005).
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Rivas-Salvador, J., Reif, J. Species-specific traits affect bird species’ susceptibility to global change. Sci Nat 110, 54 (2023). https://doi.org/10.1007/s00114-023-01883-4
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DOI: https://doi.org/10.1007/s00114-023-01883-4