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Rethinking the interpretation of spring phenological temperature sensitivity.

Manuel G Walde1, Yann Vitasse1,2, E M Wolkovich3

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Summary
This summary is machine-generated.

Warming temperatures do not necessarily constrain temperate tree spring phenology. Our findings show that decreased phenological sensitivity is mathematically expected in warming climates, without chilling or photoperiod limitations.

Keywords:
Environmental sciencesPlant developmentPlant ecology

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Area of Science:

  • Ecology
  • Plant Science
  • Climate Change Biology

Background:

  • Recent studies indicate a decline in spring phenological responses of temperate trees to rising temperatures.
  • This decline has been interpreted as evidence of warming-induced constraints from chilling and/or photoperiod.

Purpose of the Study:

  • To investigate the mathematical expectation of phenological sensitivity changes under warming climates.
  • To determine if observed declines in phenological sensitivity are necessarily due to chilling or photoperiod constraints.

Main Methods:

  • Mathematical modeling to predict phenological sensitivity under warming.
  • Analysis of data from controlled experimental conditions.
  • Computer simulations of plant phenology.
  • Examination of a long-term cherry blooming record.

Main Results:

  • The apparent decrease in phenological sensitivity is mathematically predictable under warming climates.
  • This decrease does not require constraints from photoperiod or chilling.
  • Controlled conditions, simulations, and historical data support the proposed mechanism.

Conclusions:

  • Observed declines in spring phenological sensitivity in temperate trees may not be direct evidence of chilling or photoperiod limitations.
  • Warming climates inherently lead to mathematical expectations of reduced phenological sensitivity.
  • Further research should consider the intrinsic mathematical responses of phenology to climate change.