NDLI: Within-crown structural variability of dwarfed mature Abies mariesii in snowy subalpine parkland in central Japan

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Within-crown structural variability of dwarfed mature Abies mariesii in snowy subalpine parkland in central Japan

Content Provider	Springer Nature Link
Author	Mori, Akira S. Mizumachi, Eri
Copyright Year	2009
Abstract	We investigated mature dwarf Abies mariesii trees growing in conifer thicket–meadow parklands on a snowy subalpine plateau, where these dwarf trees are buried in the accumulated snow in winter. We focused on structural variation in the needles, shoots, and branchlets within different crown positions (leader crown vs lower crown) of the dwarf trees. In the leader crown, which appears above the snow surface earlier than the lower crown, current-year shoots and branchlets had greater total biomass, and foliage was more closely packed along the stem axis than in the lower crown, whereas current-year shoots in the leader crown had a lower needle mass ratio than in the lower crown. These results suggest that current-year shoots and branchlets in the leader crown have a specific structure that allows them to harvest more light, although construction and maintenance costs would be higher. In contrast, the structural characteristics of current-year shoots and branchlets in the lower crown efficiently concentrate incoming light by avoiding mutual shading within foliage, thus leading to increased biomass of photosynthetic needles within shoot and branchlet biomass. Such within-crown variability at various hierarchical levels from needles to branches in mature, but very dwarf, A. mariesii trees maintains the crown and allows survival within conifer clumps in areas of subalpine parklands that receive heavy snowfall.
Starting Page	155
Ending Page	166
Page Count	12
File Format	PDF
ISSN	13416979
Journal	Journal of Forest Research
Volume Number	14
Issue Number	3
e-ISSN	16107403
Language	English
Publisher	Springer Japan
Publisher Date	2009-04-01
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Branch system Branchlet structure Needle morphology Shoot geometry Within-crown variability Plant Ecology Plant Sciences Tree Biology Forestry Management Forestry
Content Type	Text
Resource Type	Article
Subject	Forestry

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