What factors influence the stem taper of Eucalyptus: growth, environmental conditions, or genetics?

• Introduction Stem taper equations have been widely used for volume estimation to varied top diameter limits or for biomass calculations. However, their main drawback is that specific calibration is often necessary for each species or clone, and accounting for genetic and environmental effects is o...

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Bibliographic Details
Published in:	Annals of forest science (Print) Vol. 68; no. 1; pp. 109 - 120
Main Authors:	Gomat, Hugues Yvan, Deleporte, Philippe, Moukini, Régis, Mialounguila, Gladys, Ognouabi, Nina, Saya, Aubin Rachel, Vigneron, Philippe, Saint-Andre, Laurent
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Paris Springer-Verlag 2011 EDP Sciences Springer Nature (since 2011)/EDP Science (until 2010)
Subjects:	Agricultural sciences Biological and medical sciences Biomedical and Life Sciences Dendrometry. Forest inventory Environment Eucalyptus Forestry Forestry Management Fundamental and applied biological sciences. Psychology Life Sciences Original Paper Silviculture, forestry Tree Biology Wood Science & Technology Central Africa Sub-Saharan Africa Congo Africa Generic equation Continuous equation Stem form Stem volume Congo Taper equation Forest mensuration Tropical zone Equation Environmental factor Woody plant Stem Taper(dendrometry) Eucalyptus Dicotyledones Angiospermae Forestry Myrtaceae Genetics Spermatophyta Equatorial zone VOLUME EQUATIONS HEIGHT-DIAMETER MODELS COMPATIBLE TAPER FORM PLANTATIONS GRANDIS BOLE PINUS-RADIATA PROFILE MODEL NORTHWESTERN SPAIN
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Summary:	• Introduction Stem taper equations have been widely used for volume estimation to varied top diameter limits or for biomass calculations. However, their main drawback is that specific calibration is often necessary for each species or clone, and accounting for genetic and environmental effects is often a challenge. • Methods In order to investigate this point, we decided to study the stem shape of several clones growing in Congo and to build an equation which should (1) be simple and have a good predictive quality, (2) have explicit parameters, and (3) be generic enough so as to be transposable to other species or to other eucalyptus clones. A sample of 1,623 trees, representing 16 genetically different clones selected for their contrasting growth patterns, was used. • Results Even though these clones had different stem shapes, we successfully developed a single equation using the triplet (height/diameter at breast height/age) for all the clones. • Conclusions The study also indicates that both growth environmental conditions and genetics have an impact on the stem shape, but that the genetic effect was fully realized through tree growth. The root mean square error for the over-bark diameter was 7 mm, allowing its use over the whole plantation area.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1286-4560 1297-966X
DOI:	10.1007/s13595-011-0012-3