Dissecting impacts of phenological shifts for performance across biological scales
2022
Zettlemoyer, Meredith A. | DeMarche, Megan L.
Although phenological shifts in response to climate are often assumed to benefit species’ performance and viability, phenology’s role in allowing population persistence and mediating species-level responses in the face of climate change remain unclear. Here, we develop a framework to understand when and why phenological shifts at three biological scales will influence performance: individuals, populations, and macroecological patterns. Specifically, we highlight three underexplored assumptions: (i) individual variability in phenology does not affect population fitness; (ii) population growth rates are sensitive to vital rates affected by phenology; and (iii) phenology mediates species-level responses to climate change including patterns of extinction, invasion, and range shifts. We outline promising methods for understanding how phenological shifts will influence performance within and across biological scales.
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