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Related Experiment Video

Updated: Mar 21, 2026

Forced Flowering in Mandarin Trees under Phytotron Conditions

Forced Flowering in Mandarin Trees under Phytotron Conditions

Published on: March 6, 2019

Plant phenological synchrony increases under rapid within-spring warming.

Cong Wang¹, Yanhong Tang², Jin Chen¹

¹State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China.

Scientific Reports

|May 6, 2016

Summary

Climate change impacts plant phenology. Rapid spring warming speed, not just temperature, synchronizes plant leafing and flowering times, affecting ecological processes.

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Area of Science:

Ecology
Climate Change Biology
Plant Phenology

Background:

Phenological synchrony is crucial for ecological processes.
Climate change is altering phenological synchrony, but mechanisms are unclear.
Understanding these mechanisms is vital for predicting ecological responses to warming.

Purpose of the Study:

To investigate the relationship between within-spring warming speed and plant phenological synchrony.
To determine if the rate of spring warming or temperature magnitude drives phenological synchrony.
To explore the implications for plant communities in different regions under climate change.

Main Methods:

Utilized in situ phenological records from European plant populations.
Calculated within-spring warming speed (WWS) as the linear slope of daily mean temperature during spring.
Analyzed the standard deviation (SD) of first leafing day (FLD) and first flowering day (FFD) as measures of synchrony.

Main Results:

Smaller SD of FLD and FFD were significantly correlated with higher WWS.
Temperature sensitivity of local plants also showed smaller SD under rapid WWS conditions.
Found that the rate of temperature change during spring, not the overall magnitude, dictates phenological synchrony.

Conclusions:

The rate of spring warming is a key determinant of plant phenological synchrony.
Asymmetric seasonal warming may decrease synchrony, particularly in Arctic regions, by increasing WWS.
Plants in low WWS areas (e.g., coastal, low latitude) may exhibit more diverse phenological traits.