Allocation of gross primary production in forest ecosystems: allometric constraints and environmental responses
Article first published online: 31 JUL 2013
© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust
Volume 200, Issue 4, pages 1176–1186, December 2013
How to Cite
Chen, G., Yang, Y. and Robinson, D. (2013), Allocation of gross primary production in forest ecosystems: allometric constraints and environmental responses. New Phytologist, 200: 1176–1186. doi: 10.1111/nph.12426
- Issue published online: 4 NOV 2013
- Article first published online: 31 JUL 2013
- Manuscript Accepted: 22 JUN 2013
- Manuscript Received: 3 APR 2013
- National Natural Science Foundation of China. Grant Numbers: 31130013, 31000321
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT). Grant Number: IRT0960
- Science Foundation of the Fujian Province, China. Grant Number: 2010J06009
- assimilate allocation;
- carbon accumulation;
- climate change;
- forest ecosystems;
- optimal partitioning;
- plant allometry
- Understanding the allocation of gross primary production (GPP) and its response to climate is essential for improving terrestrial carbon (C) modelling.
- Here, we synthesize data on component GPP fluxes from a worldwide forest database to determine the allocation patterns of GPP across global gradients in climate and nitrogen deposition (Ndep).
- Our results reveal that allocation of GPP is governed in an integrated way by allometric constraints and by three trade-offs among GPP components: wood production (NPPwood) vs fine-root production (NPPfroot), NPPwood vs foliage production (NPPfoliage), and autotrophic respiration (Ra) vs all biomass production components. Component fluxes were explained more by allometry, while partitioning to components was related more closely to the trade-offs. Elevated temperature and Ndep benefit long-term woody biomass C sequestration by stimulating allometric partitioning to wood. Ndep can also enhance forest C use efficiency by its effects on the Ra vs biomass production trade-off. Greater precipitation affects C allocation by driving the NPPwood vs NPPfoliage trade-off toward the latter component.
- These results advance our understanding about the global constraints on GPP allocation in forest ecosystems and its climatic responses, and are therefore valuable for simulations and projections of ecosystem C sequestration.