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This is a summary of: Zheng, S., Hu, J., Ma, Z., Lindenmayer, D. & Liu, J. Increases in intraspecific body size variation are common amongst North American mammals and birds between 1880 and 2020. Nat. Ecol. Evol., https://doi.org/10.1038/s41559-022-01967-w (2023).
Source: Ecology - nature.com