Interactions Between Soil Fertility and Forest Dynamics in the Bolivian Amazon Forest.
Carlos
Alberto
Quesada, Max-Planck Institute for Biogeochemistry, Jena, Germany., quesada@unb.br
(Presenting)
Jonathan
James
Lloyd, 1Max-Planck Institute for Biogeochemistry, Jena, Germany., jon.lloyd@bgc-jena.mpg.de
Sandra
Patiño, 1Max-Planck Institute for Biogeochemistry, Jena, Germany., spatino@bgc-jena.mpg.de
Oliver
L.
Phillips, University of Leeds, Leeds, England, o.phillips@geog.leeds.ac.uk
Yadvinder
Singh
Malhi, University of Edinburgh, Edinburgh, Scotland., ymalhi@ed.ac.uk
Almuth
Arneth, Max-Planck Institute for Biogeochemistry,
Luzmilla
Arroyo, Museo Nacional Noel Kempf Mercado, Santa Cruz de la Sierra, Bolívia, luzmillaarroyo@hotmail.com
Timothy
Killeen, Museo Nacional Noel Kempf Mercado, Santa Cruz de la Sierra, Bolívia, t.killeen@conservation.org
This study aimed to understand the influence of soil fertility on forest dynamics in the Bolivian Amazon. Nine permanent plots of 1 ha were recensused in 2001 with soil and leaves sampled for subsequent chemical analysis in order to detect possible correlations between site fertility and parameters as basal area (BA), above ground biomass (B), basal area increment (Bi) and net primary production (NPP). Foliar analysis indicated that Ca and Mg were dependent on soil availability and almost certainly deficient in two of the nine plots. These highly weathered oxisol soils may have a nutrient status below that required for optimal forest growth. By contrast, for other macro and micro elements, foliar concentrations were independent of soil availability.
Canonical Correlation Analysis reveal that, for the studied areas, the BA, B and productivity were correlated with soil fertility, especially with with pH, and available Ca and Mg.
Submetido por Carlos Alberto Nobre Quesada em 18-MAR-2004
Tema Científico do LBA: CD (Armazenamento e Trocas de Carbono)