Journal
NEW PHYTOLOGIST
Volume 206, Issue 2, Pages 614-636Publisher
WILEY
DOI: 10.1111/nph.13253
Keywords
acclimation; aridity; climate models; leaf nitrogen (N); photosynthesis; plant functional types (PFTs); respiration; temperature
Categories
Funding
- New Phytologist Trust
- Research School of Biology, ANU
- TRY initiative
- DIVERSITAS
- IGBP
- Global Land Project
- UK Natural Environment Research Council (NERC) through QUEST (Quantifying and Understanding the Earth System)
- French Foundation for Biodiversity Research (FRB)
- GIS Climat Environnement et Societe
- Australian Research Council [FT0991448, DP0986823, DP1093759, DP130101252, CE140100008, FT110100457]
- Australian SuperSite Network part of the Australian Government's Terrestrial Ecosystem Research Network
- UK NERC [NE/C51621X/1, 709 NE/F002149/1]
- Moore Foundation
- Australian Research Council [DP1093759, FT0991448] Funding Source: Australian Research Council
- NERC [NE/K01644X/1, ceh020002, NE/J023531/1, NE/F002149/1] Funding Source: UKRI
- Natural Environment Research Council [ceh020002, NE/J023531/1, NE/F002149/1, NE/C51621X/1, NE/K01644X/1] Funding Source: researchfish
- Division Of Environmental Biology
- Direct For Biological Sciences [1026843] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1242531] Funding Source: National Science Foundation
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1051789] Funding Source: National Science Foundation
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Leaf dark respiration (R-dark) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new global database of R-dark and associated leaf traits. Data for 899 species were compiled from 100 sites (from the Arctic to the tropics). Several woody and nonwoody plant functional types (PFTs) were represented. Mixed-effects models were used to disentangle sources of variation in R-dark. Area-based R-dark at the prevailing average daily growth temperature (T) of each siteincreased only twofold from the Arctic to the tropics, despite a 20 degrees C increase in growing T (8-28 degrees C). By contrast, R-dark at a standard T (25 degrees C, R-dark(25)) was threefold higher in the Arctic than in the tropics, and twofold higher at arid than at mesic sites. Species and PFTs at cold sites exhibited higher R-dark(25) at a given photosynthetic capacity (V-cmax(25)) or leaf nitrogen concentration ([N]) than species at warmer sites. R-dark(25) values at any given V-cmax(25) or [N] were higher in herbs than in woody plants. The results highlight variation in R-dark among species and across global gradients in T and aridity. In addition to their ecological significance, the results provide a framework for improving representation of R-dark in terrestrial biosphere models (TBMs) and associated land-surface components of Earth system models (ESMs).
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