Biomass distribution among tropical tree species grown under differing regional climates

Bastien-Henri, Sara; Park, Andrew; Ashton, Mark et Messier, Christian (2010). « Biomass distribution among tropical tree species grown under differing regional climates ». Forest Ecology and Management, 260, pp. 403-410.

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Résumé

In the Neotropics, there is a growing interest in establishing plantations of native tree species for commerce, local consumption, and to replant on abandoned agricultural lands. Although numerous trial plantations have been established, comparative information on the performance of native trees under different regional environments is generally lacking. In this study, we evaluated the accumulation and partitioning of above-ground biomass in 16 native and two exotic tree species growing in replicated species selection trials in Panama under humid and dry regional environments. Seven of the 18 species accumulated greater total biomass at the humid site than at the dry site over a two-year period. Species specific biomass partitioning among leaves, branches and trunks was observed. However, awide range of total biomass found among species (from 1.06 kg for Dipteryx panamensis to 29.84 kg for Acacia mangium at Soberania) justified the used of an Aitchison log ratio transformation to adjust for size. When biomass partitioning was adjusted for size, a majority of these differences proved to be a result of the ability of the tree to support biomass components rather than the result of differences in the regional environments at the two sites. These findings were confirmed by comparative ANCOVAs on Aitchison-transformed and non-Aitchison-transformed variables. In these comparisons, basal diameter, height and diameter at breast height were robust predictors of biomass for the pooled data from both sites, but Aitchison-transformed variables had little predictive power.

Type:	Article de revue scientifique
Mots-clés ou Sujets:	Biomass distribution, size effect, Aitchison transformation, Site condition, Panama, Native tree species
Unité d'appartenance:	Centres institutionnels > Centre d'étude de la forêt (CEF) Faculté des sciences > Département des sciences biologiques
Déposé par:	Christian Messier
Date de dépôt:	23 août 2010 13:02
Dernière modification:	01 nov. 2014 02:15
Adresse URL :	http://archipel.uqam.ca/id/eprint/3318

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