TY - JOUR
T1 - Temperature thresholds of ecosystem respiration at a global scale
AU - Johnston, Alice S.A.
AU - Meade, Andrew
AU - Ardö, Jonas
AU - Arriga, Nicola
AU - Black, Andy
AU - Blanken, Peter D.
AU - Bonal, Damien
AU - Brümmer, Christian
AU - Cescatti, Alessandro
AU - Dušek, Jiří
AU - Graf, Alexander
AU - Gioli, Beniamino
AU - Goded, Ignacio
AU - Gough, Christopher M.
AU - Ikawa, Hiroki
AU - Jassal, Rachhpal
AU - Kobayashi, Hideki
AU - Magliulo, Vincenzo
AU - Manca, Giovanni
AU - Montagnani, Leonardo
AU - Moyano, Fernando E.
AU - Olesen, Jørgen E.
AU - Sachs, Torsten
AU - Shao, Changliang
AU - Tagesson, Torbern
AU - Wohlfahrt, Georg
AU - Wolf, Sebastian
AU - Woodgate, William
AU - Varlagin, Andrej
AU - Venditti, Chris
PY - 2021
Y1 - 2021
N2 - Ecosystem respiration is a major component of the global terrestrial carbon cycle and is strongly influenced by temperature. The global extent of the temperature–ecosystem respiration relationship, however, has not been fully explored. Here, we test linear and threshold models of ecosystem respiration across 210 globally distributed eddy covariance sites over an extensive temperature range. We find thresholds to the global temperature–ecosystem respiration relationship at high and low air temperatures and mid soil temperatures, which represent transitions in the temperature dependence and sensitivity of ecosystem respiration. Annual ecosystem respiration rates show a markedly reduced temperature dependence and sensitivity compared to half-hourly rates, and a single mid-temperature threshold for both air and soil temperature. Our study indicates a distinction in the influence of environmental factors, including temperature, on ecosystem respiration between latitudinal and climate gradients at short (half-hourly) and long (annual) timescales. Such climatological differences in the temperature sensitivity of ecosystem respiration have important consequences for the terrestrial net carbon sink under ongoing climate change.
AB - Ecosystem respiration is a major component of the global terrestrial carbon cycle and is strongly influenced by temperature. The global extent of the temperature–ecosystem respiration relationship, however, has not been fully explored. Here, we test linear and threshold models of ecosystem respiration across 210 globally distributed eddy covariance sites over an extensive temperature range. We find thresholds to the global temperature–ecosystem respiration relationship at high and low air temperatures and mid soil temperatures, which represent transitions in the temperature dependence and sensitivity of ecosystem respiration. Annual ecosystem respiration rates show a markedly reduced temperature dependence and sensitivity compared to half-hourly rates, and a single mid-temperature threshold for both air and soil temperature. Our study indicates a distinction in the influence of environmental factors, including temperature, on ecosystem respiration between latitudinal and climate gradients at short (half-hourly) and long (annual) timescales. Such climatological differences in the temperature sensitivity of ecosystem respiration have important consequences for the terrestrial net carbon sink under ongoing climate change.
U2 - 10.1038/s41559-021-01398-z
DO - 10.1038/s41559-021-01398-z
M3 - Article
C2 - 33619357
AN - SCOPUS:85101236855
SN - 2397-334X
VL - 5
SP - 487
EP - 494
JO - Nature Ecology and Evolution
JF - Nature Ecology and Evolution
IS - 4
ER -