25. St. George, S., and Luckman, B.H. 2001.
Extracting a paleotemperature record from Picea
engelmannii treeline sites in the central
Canadian Rockies. Canadian Journal of Forest
Research 31, 457-470.
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28. THE PRINCIPLE OF
ECOLOGICAL AMPLITUDE
A tree species may grow and reproduce over a certain range of
habitats; that range is described as its ecological amplitude.
Trees that grow near the margins or limits of their ecological
amplitude are o en sensitive to changes in their environment.
Monday, March 7, 2011
59. SURFACE TEMPERATURE
RECONSTRUCTIONS
FOR T H E LAS T 2 , 00 0 Y E A R S
NATIONAL RESEARCH COUNCIL
OF THE NATIONAL ACADEMIES
Monday, March 7, 2011
60. the ‘divergence problem’ is defined as the tendency for
tree growth at some previously temperature-limited
northern sites to demonstrate a weakening in mean
temperature response in recent decades.
Source: D’Arrigo et al., 2008
Monday, March 7, 2011