At species level, 8% and 15% of species advanced and delayed their peaks, respectively ( figure 2 b ; electronic supplementary material, appendix, table S3). (c) Butterfly sensitivity to climate The effect of temperature on butterfly emergence peak was negative for most species, indicating a clear trend to advance the flight period as temperatures increase ( figure 2 c ).
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Phenological sensitivity and seasonal variability explain climate-driven trends in Mediterranean butterflies.
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