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| Titel |
Height-diameter allometry of tropical forest trees |
| VerfasserIn |
T. R. Feldpausch, L. Banin, O. L. Phillips, T. R. Baker, S. L. Lewis, C. A. Quesada, K. Affum-Baffoe, E. J. M. M. Arets, N. J. Berry, M. Bird, E. S. Brondizio, P. Camargo, J. Chave, G. Djagbletey, T. F. Domingues, M. Drescher, P. M. Fearnside, M. B. França, N. M. Fyllas, G. López-González, A. Hladik, N. Higuchi, M. O. Hunter, Y. Iida, K. A. Salim, A. R. Kassim, M. Keller, J. Kemp, D. A. King, J. C. Lovett, B. S. Marimon, B. H. Marimon-Junior, E. Lenza, A. R. Marshall, D. J. Metcalfe, E. T. A. Mitchard, E. F. Moran, B. W. Nelson, R. Nilus, E. M. Nogueira, M. Palace, S. Patiño, K. S.-H. Peh, M. T. Raventos, J. M. Reitsma, G. Saiz, F. Schrodt, B. Sonké, H. E. Taedoumg, S. Tan, L. White, H. Wöll, J. Lloyd |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 5 ; Nr. 8, no. 5 (2011-05-05), S.1081-1106 |
| Datensatznummer |
250005808
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| Publikation (Nr.) |
 copernicus.org/bg-8-1081-2011.pdf |
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| Zusammenfassung |
Tropical tree height-diameter (H:D) relationships may vary by forest type
and region making large-scale estimates of above-ground biomass subject to bias if they
ignore these differences in stem allometry. We have therefore developed a new global
tropical forest database consisting of 39 955 concurrent H and D
measurements encompassing 283 sites in 22 tropical countries. Utilising this database, our
objectives were:
1. to determine if H:D relationships differ by geographic region and forest
type (wet to dry forests, including zones of tension where forest and savanna overlap).
2. to ascertain if the H:D relationship is modulated by climate and/or forest
structural characteristics (e.g. stand-level basal area, A).
3. to develop H:D allometric equations and evaluate biases to reduce error in
future local-to-global estimates of tropical forest biomass.
Annual precipitation coefficient of variation (PV), dry season length
(SD), and mean annual air temperature (TA) emerged as key drivers of
variation in H:D relationships at the pantropical and region scales. Vegetation
structure also played a role with trees in forests of a high A being, on average, taller
at any given D. After the effects of environment and forest structure are taken into
account, two main regional groups can be identified. Forests in Asia, Africa and the Guyana
Shield all have, on average, similar H:D relationships, but with trees in the forests of
much of the Amazon Basin and tropical Australia typically being shorter at any given D
than their counterparts elsewhere.
The region-environment-structure model with the lowest Akaike's information criterion and
lowest deviation estimated stand-level H across all plots to
within amedian −2.7 to 0.9% of the true
value. Some of the plot-to-plot variability in H:D relationships not accounted for by
this model could be attributed to variations in soil physical conditions. Other things being
equal, trees tend to be more slender in the absence of soil physical constraints, especially
at smaller D. Pantropical and continental-level models provided less robust estimates of
H, especially when the roles of climate and stand structure in modulating H:D
allometry were not simultaneously taken into account. |
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