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Flowering, Canada, Global warming, Phenology, Climate change

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Subject-Keyword: Flowering Canada Global warming Phenology Climate change

Type of item: Journal Article Published

Language: English

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Description: Abstract: In documenting biological responses to climate change, the Intergovernmental Panel on Climate Change has used phenology studies from many parts of the world, but data from the high latitudes of North America are missing. In the present article, we evaluate climate trends and the corresponding changes in sequential bloom times for seven plant species in the central parklands of Alberta, Canada latitude 52 degrees-57 degrees north. For the study period of 71 years 1936-2006, we found a substantial warming signal, which ranged from an increase of 5.3 degrees Celsius degrees C in the mean monthly temperatures for February to an increase of 1.5 degrees C in those for May. The earliest-blooming species- Populus tremuloides and Anemone patens bloom dates advanced by two weeks during the seven decades, whereas the later-blooming species- bloom dates advanced between zero and six days. The early-blooming species- bloom dates advanced faster than was predicted by thermal time models, which we attribute to decreased diurnal temperature fluctuations. This unexpectedly sensitive response results in an increased exposure to late-spring frosts.

Date created: 2011

DOI: doi:10.7939-R3FJ0D

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Rights: © 2011 American Institute of Biological Sciences. This version of this article is open access and can be downloaded and shared. The original authors and source must be cited.





Autor: Beaubien, E. Hamann, A.

Fuente: https://era.library.ualberta.ca/


Introducción



Articles Spring Flowering Response to Climate Change between 1936 and 2006 in Alberta, Canada Elisabeth Beaubien and Andreas Hamann In documenting biological responses to climate change, the Intergovernmental Panel on Climate Change has used phenology studies from many parts of the world, but data from the high latitudes of North America are missing.
In the present article, we evaluate climate trends and the corresponding changes in sequential bloom times for seven plant species in the central parklands of Alberta, Canada (latitude 528–578 north).
For the study period of 71 years (1936–2006), we found a substantial warming signal, which ranged from an increase of 5.3 degrees Celsius (8C) in the mean monthly temperatures for February to an increase of 1.58C in those for May.
The earliest-blooming species’ (Populus tremuloides and Anemone patens) bloom dates advanced by two weeks during the seven decades, whereas the later-blooming species’ bloom dates advanced between zero and six days. The early-blooming species’ bloom dates advanced faster than was predicted by thermal time models, which we attribute to decreased diurnal temperature fluctuations.
This unexpectedly sensitive response results in an increased exposure to late-spring frosts. Keywords: climate change, global warming, phenology, flowering, Canada T he scientific field of phenology, the study of the seasonal  timing of life-cycle events, has seen a recent revival in light of climate change’s growing prominence.
Sparks and colleagues (2009) noted that the use of the term phenology in the scientific literature became seven times more common between 1990 and 2008.
In documenting biological responses to global climate change, the Intergovernmental Panel on Climate Change has relied on phenology studies as compelling evidence that species and ecosystems respond to global climate change (Rosenzweig et  al.
2007).
Particularly for perennial plants in temperate zones, temperature exposure over t...





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