Please use this identifier to cite or link to this item:
Title: Edaphic controls on ecosystem-level carbon allocation in two contrasting Amazon forests
Authors: Jiménez, E. M.
Peñuela, María Cristina
Sierra, Carlos A.
Lloyd, Jon
Phillips, Oliver L.
Moreno, Flavio Humberto
Navarrete, Diego
Prieto, Adriana
Rudas, Agustín
Alvarez, Esteban
Quesada, Carlos Alberto
Grande-Ortiz, M. A.
García-Abril, Antonio
Patiño, Sandra
Keywords: Biomass Allocation
Carbon Balance
Forest Ecosystem
Global Perspective
Net Primary Production
Soil Quality
Soil Type
Spatio-temporal Analysis
Uncertainty Analysis
Issue Date: 2014
metadata.dc.publisher.journal: Journal of Geophysical Research: Biogeosciences
metadata.dc.relation.ispartof: Volume 119, Número 9, Pags. 1820-1830
Abstract: Studies of carbon allocation in forests provide essential information for understanding spatial and temporal differences in carbon cycling that can inform models and predict possible responses to changes in climate. Amazon forests play a particularly significant role in the global carbon balance, but there are still large uncertainties regarding abiotic controls on the rates of net primary production (NPP) and the allocation of photosynthetic products to different ecosystem components. We evaluated three different aspects of stand-level carbon allocation (biomass, NPP, and its partitioning) in two amazon forests on different soils (nutrient-rich clay soils versus nutrient-poor sandy soils) but otherwise growing under similar conditions. We found differences in carbon allocation patterns between these two forests, showing that the forest on clay soil had a higher aboveground and total biomass as well as a higher aboveground NPP than the sandy forest. However, differences between the two forest types in terms of total NPP were smaller, as a consequence of different patterns in the carbon allocation of aboveground and belowground components. The proportional allocation of NPP to new foliage was relatively similar between them. Our results of aboveground biomass increments and fine-root production suggest a possible trade-off between carbon allocation to fine roots versus aboveground compartments, as opposed to the most commonly assumed trade-off between total aboveground and belowground production. Despite these differences among forests in terms of carbon allocation, the leaf area index showed only small differences, suggesting that this index is more indicative of total NPP than its aboveground or belowground components. © 2014. American Geophysical Union. All Rights Reserved.
metadata.dc.identifier.doi: 10.1002/2014JG002653
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.