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- Title
Foliage height influences specific leaf area of three conifer species .
- Authors
Marshall, John D.; Monserud, Robert A.
- Abstract
Reports that specific leaf area (SLA), the ratio of projected leaf area to leaf dry mass, is a critical parameter in many forest process models. SLA that describes the efficiency with which the leaf captures light relative to the biomass invested in the leaf; Sampling of stands with low and elevated canopies (young and old stands) to determine whether SLA is related to water potential, as inferred from branch height and length, or shade, as inferred from branch position relative to the rest of the canopy, or both; Study of western white pine (Pinus monticola Dougl. ex D. Don), ponderosa pine (Pinus ponderosa Dougl. ex P. & C. Laws.), and interior Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. glauca) in northern Idaho; Decrease of SLA with branch height at rates that varied among species; Branch length that had no influence on SLA; Detection of no differences with canopy elevation; Slopes of lines relating SLA to branch height that may have differed between the canopy elevation classes; Results that are consistent with predictions based on the hypothesis that SLA decreases as the gravitational component of water potential falls; Lack of a strong shading effect that simplifies the estimation of canopy SLA for process models, requiring only species and branch heights
- Subjects
IDAHO; UNITED States; LEAVES; FORESTS &; forestry; WHITE pine; PONDEROSA pine; DOUGLAS fir
- Publication
Canadian Journal of Forest Research, 2003, Vol 33, Issue 1, p164
- ISSN
0045-5067
- Publication type
Article
- DOI
10.1139/x02-158