Intraspecific differences in spring leaf phenology in relation to tree size in temperate deciduous trees

Tree Physiology
Noriyuki Osada, Tsutom Hiura

Abstract

Spring leaf phenology strongly influences plant productivity in temperate deciduous forests. Many studies have detected earlier budburst and leaf maturation in smaller trees within species, and have discussed the adaptive significance of increasing carbon gain before canopy closure in small trees. However, some previous studies have found the opposite pattern, and the physiological and environmental bases for this discrepancy are incompletely understood. We investigated the spring leaf phenology of 11 deciduous species in a cool-temperate forest in Japan for 2 years with different amounts of snowfall, and also gathered data on the day of budburst from multiple studies to assess whether and how the timing of budburst is related to tree size, phylogeny, temperature and annual snowfall of study sites. We found that differences in the timing of budburst and leaf maturation between saplings (<1 m height) and short trees (1-10 m height) are larger than those between short trees and tall trees (>10 m height), resulting in non-linear relationships between timing and height in most species. Cumulative degree-days to the day of budburst were smaller in saplings than in tall trees, probably because saplings are selected to outcompete the ...Continue Reading

References

May 6, 2003·Tree Physiology·Carol K Augspurger, Elizabeth A Bartlett
Mar 20, 2010·Science·Christian Körner, David Basler
Sep 8, 2010·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Charles C DavisAbraham J Miller-Rushing
Dec 11, 2013·Global Change Biology·Julia LaubeAnnette Menzel
Dec 24, 2013·Nature·Amy E ZanneJeremy M Beaulieu
Aug 22, 2014·Plant, Cell & Environment·Danielle A Way, Rebecca A Montgomery

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