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sents the altitudinal or latitudinal limit to tree growth (Kullman 1998, Körner 1999).From a review of published data, Grace (1988) concluded that “a 1°C increase in a north temperate climate may be expected to increase plant productivity by about 10 percent, providing that other factors like water or nutrients do not become limiting.” Controlled experiments dealing with the effect of temperature on plant growth are mostly performed on herbaceous species or seedlings (Junttila 1986, Loveys et al.This layer, or ring as seen in cross section, can be wide, recording a wet season, or narrow, recording a dry growing season.

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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source (děn'drō-krə-nŏl'ə-jē) The study of growth rings in trees for the purpose of analyzing past climate conditions or determining the dates of past events.Because trees grow more slowly in periods of drought or other environmental stress than they do under more favorable conditions, the size of the rings they produce varies.Each year trees add growth rings, which can indicate what sort of growing season the tree experienced.Interestingly these rings are more than a temperature indicator, they also tell the researcher about moisture and cloudiness as well.These first new cells are large, but as the summer progresses their size decreases until, in the fall, growth stops and cells die, with no new growth appearing until the next spring.

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