Journal Article

FZJ-2021-03538

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Temperature thresholds of ecosystem respiration at a global scale

Johnston, A. S. A. (Corresponding author) ; Meade, A. ; Ardö, J. ; Arriga, N. ; Black, A. ; Blanken, P. D. ; Bonal, D. ; Brümmer, C. ; Cescatti, A. ; Dušek, J. ; Graf, A.FZJ* ; Gioli, B. ; Goded, I. ; Gough, C. M. ; Ikawa, H. ; Jassal, R. ; Kobayashi, H. ; Magliulo, V. ; Manca, G. ; Montagnani, L. ; Moyano, F. E. ; Olesen, J. E. ; Sachs, T. ; Shao, C. ; Tagesson, T. ; Wohlfahrt, G. ; Wolf, S. ; Woodgate, W. ; Varlagin, A. ; Venditti, C.

2021
Nature Publishing Group London

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Please use a persistent id in citations: http://hdl.handle.net/2128/28702  doi:10.1038/s41559-021-01398-z

Abstract: 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.

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Contributing Institute(s):

1. Agrosphäre (IBG-3)

Research Program(s):

1. 2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217) (POF4-217)

Appears in the scientific report 2021

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Database coverage:
; ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

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