期刊
URBAN FORESTRY & URBAN GREENING
卷 14, 期 3, 页码 466-479出版社
ELSEVIER GMBH
DOI: 10.1016/j.ufug.2015.04.006
关键词
Crown cross section area; Crown radius; Size growth; Solitary growth; Tree allometry; Urban trees
资金
- AUDI environmental foundation
- Bavarian State Ministry for Environment and Health [TUF01UF-64971]
- Bavarian State Ministry for Nutrition, Agriculture and Forestry [7831-23953-2014]
Tree crown size determines among others tree's growth, carbon sequestration, shading, filtering of fine air particulates, and risk of wind-breaking. The dependence of crown size on species, resource supply, and tree age complicates an accurate evaluation of a tree's space requirement, and its size-dependent functions and services in urban as well as in forested areas. Based on a world-wide dataset of tree crown measurements of 22 common urban tree species we first derived species-specific crown radius-stem diameter relationships for open grown conditions. By cluster analysis we then assigned the 22 species to 5 crown extension types and developed mean relationships of tree height, crown radius, crown projection area, and crown volume depending on tree diameter for each type. This allometric analysis yielded auxiliary relationships which can be used for estimating the species-specific crown size and dynamics at a given tree dimension. We discuss how the results can support the choice and initial spacing of particular species and the assessment and prognosis of their functions and services. (C) 2015 The Authors. Published by Elsevier GmbH.
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