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Shifts in pollen release envelope differ between genera with non-uniform climate change
Zoe A Panchen1, Mark O Johnston1
1Dalhousie University, 1355 Oxford St., P.O. Box 15000, Halifax, Nova Scotia, Canada, B3H 4R2.
American Journal of Botany
|September 15, 2018
Summary
Climate change impacts wind-pollinated species differently. Betula (Birch) flowering advanced, while Populus (Aspen/Poplar) flowering duration shortened, showing varied reproductive consequences of environmental change.
Area of Science:
- Ecology
- Climate Change Biology
- Phenology
Background:
- Plant phenological responses to climate change are well-studied, but wind-pollinated species are less understood.
- Allergen monitoring records offer a novel data source for wind-pollinated species' flowering times.
Purpose of the Study:
- To investigate the male flowering time response to climate variables in two wind-pollinated genera: Betula and Populus.
- To analyze 17 years of pollen count data to understand phenological shifts.
Main Methods:
- Utilized 17-year pollen count records for Betula and Populus.
- Correlated pollen release timing and quantity with climatic variables.
Main Results:
- Betula flowering advanced, while Populus flowering duration shortened due to rising April temperatures.
- Betula pollen quantity increased, linked to previous August precipitation; Populus quantity remained stable, linked to summer/autumn temperatures.
Conclusions:
- Taxa exhibit differing reproductive consequences in response to environmental change.
- Non-uniform intra-annual climate variation is crucial for understanding ecological implications of climate change.
- Species-specific phenological shifts highlight the need for detailed climate variable analysis.
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