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Causation of false ring formation in Pinus banksiana: A comparison of age, canopy class, climate and growth rate
 

Summary: Causation of false ring formation in Pinus banksiana: A comparison
of age, canopy class, climate and growth rate
Carolyn A. Copenheaver a,*, Elizabeth A. Pokorski b
, Joseph E. Currie a
, Marc D. Abrams c
a
Forestry Department, Virginia Tech, Blacksburg, VA 24061, United States
b
Conservation Management Institute, Virginia Tech, Blacksburg, VA 24061, United States
c
School of Forest Resources, Penn State, University Park, PA 16802, United States
Received 5 August 2006; received in revised form 19 September 2006; accepted 20 September 2006
Abstract
False rings may provide a new source of proxy data for historical environmental conditions once the causes of their formation are understood.
The objective of this research was to compare tree age, canopy class, temperature, precipitation, and growth rate as potential causal factors in false
ring formation in Pinus banksiana Lambert. Our data consisted of 180 P. banksiana tree cores from three stands in northern lower Michigan. All
cores were cross-dated and measured and false rings were identified by anatomical features within the wood. Frequency of false rings varied, with
48%, 78%, and 80% of the cores having at least one false ring in the three stands. Although there was within-stand synchrony in the timing of false
ring formation no significant correlations existed between temperature and precipitation records and frequency of false ring production. Event
years (periods of high false ring formation) were identified and superposed epoch analysis detected significantly higher growth rates preceded

  

Source: Abrams, Marc David - School of Forest Resources, Pennsylvania State University

 

Collections: Environmental Sciences and Ecology