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Is NPP proportional to GPP? Waring’s hypothesis twenty years on
File | Description | Size | Format | |
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NPP-GPP_Collalti_Prentice_Final_ACCEPTED_clean[1208].docx | Accepted version | 121.19 kB | Microsoft Word | View/Open |
Title: | Is NPP proportional to GPP? Waring’s hypothesis twenty years on |
Authors: | Collalti, A Prentice, I |
Item Type: | Journal Article |
Abstract: | Gross primary production (GPP) is partitioned to autotrophic respiration (Ra) and net primary production (NPP), the latter being used to build plant tissues and synthesize non-structural and secondary compounds. Waring et al. (1998) suggested that a NPP:GPP ratio of 0.47 ± 0.04 (s.d.) is universal across biomes, tree species and stand ages. Representing NPP in models as a fixed fraction of GPP, they argued, would be both simpler and more accurate than trying to simulate Ra mechanistically. This paper reviews progress in understanding the NPP:GPP ratio in forests during the 20 years since Waring et al.. Research has confirmed the existence of pervasive acclimation mechanisms that tend to stabilize the NPP:GPP ratio, and indicates that Ra should not be modelled independently of GPP. Nonetheless, studies indicate that the value of this ratio is influenced by environmental factors, stand age and management. The average NPP:GPP ratio in over 200 studies, representing different biomes, species and forest stand ages, was found to be 0.46, consistent with the central value that Waring et al. proposed but with a much larger standard deviation (± 0.12) and a total range (0.22 to 0.79) that is too large to be disregarded. |
Issue Date: | 1-Aug-2019 |
Date of Acceptance: | 27-Mar-2019 |
URI: | http://hdl.handle.net/10044/1/69743 |
DOI: | 10.1093/treephys/tpz034 |
ISSN: | 1758-4469 |
Publisher: | Oxford University Press (OUP) |
Start Page: | 1473 |
End Page: | 1483 |
Journal / Book Title: | Tree Physiology |
Volume: | 39 |
Issue: | 8 |
Copyright Statement: | © The Author(s) 2019. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. This is a pre-copy-editing, author-produced version of an article accepted for publication in Tree physiology following peer review. The definitive publisher-authenticated version is available online at: https://academic.oup.com/treephys/advance-article/doi/10.1093/treephys/tpz034/5423351 |
Sponsor/Funder: | AXA Research Fund European Research Council |
Funder's Grant Number: | AXA Chair Programme in Biosphere and Climate Impacts 787203 |
Keywords: | Science & Technology Life Sciences & Biomedicine Forestry autotrophic respiration carbon-use efficiency forest ecosystem modelling primary production CARBON-USE EFFICIENCY NET PRIMARY PRODUCTION RESPIRATION PHOTOSYNTHESIS RATIO WHOLE-PLANT RESPIRATION FOREST ECOSYSTEM MODEL EDDY COVARIANCE DATA LEAF RESPIRATION MAINTENANCE RESPIRATION PRIMARY PRODUCTIVITY THERMAL-ACCLIMATION autotrophic respiration carbon-use efficiency forest ecosystem modelling primary production Plant Biology & Botany 0705 Forestry Sciences 0607 Plant Biology 0602 Ecology |
Publication Status: | Published |
Online Publication Date: | 2019-05-17 |
Appears in Collections: | Department of Life Sciences Faculty of Natural Sciences |