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Temperature thresholds of ecosystem respiration at a global scale

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DOI

  • Alice S.A. Johnston, Cranfield University, University of Reading
  • ,
  • Andrew Meade, University of Reading
  • ,
  • Jonas Ardö, Lund University
  • ,
  • Nicola Arriga, European Commission Joint Research Centre Institute
  • ,
  • Andy Black, University of British Columbia
  • ,
  • Peter D. Blanken, University of Colorado Boulder
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  • Damien Bonal, Universite de Lorraine
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  • Christian Brümmer, Thünen Institute of Climate-Smart Agriculture
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  • Alessandro Cescatti, European Commission Joint Research Centre Institute
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  • Jiří Dušek, Czech Academy of Sciences
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  • Alexander Graf, Jülich Research Centre
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  • Beniamino Gioli, CNR
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  • Ignacio Goded, European Commission Joint Research Centre Institute
  • ,
  • Christopher M. Gough, Virginia Commonwealth University
  • ,
  • Hiroki Ikawa, Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba 305-8604, Japan
  • ,
  • Rachhpal Jassal, University of British Columbia
  • ,
  • Hideki Kobayashi, Japan Agency for Marine-Earth Science and Technology
  • ,
  • Vincenzo Magliulo, CNR
  • ,
  • Giovanni Manca, European Commission Joint Research Centre Institute
  • ,
  • Leonardo Montagnani, Forest Services, Free University of Bozen-Bolzano
  • ,
  • Fernando E. Moyano, University of Göttingen
  • ,
  • Jørgen E. Olesen
  • Torsten Sachs, Helmholtz Centre Potsdam - German Research Centre for Geosciences
  • ,
  • Changliang Shao, Chinese Academy of Agricultural Sciences
  • ,
  • Torbern Tagesson, Lund University, Københavns Universitet
  • ,
  • Georg Wohlfahrt, University of Innsbruck
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  • Sebastian Wolf, ETH Zürich
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  • William Woodgate, CSIRO, University of Queensland
  • ,
  • Andrej Varlagin, Russian Academy of Sciences
  • ,
  • Chris Venditti, University of Reading

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.

OriginalsprogEngelsk
TidsskriftNature Ecology & Evolution
Vol/bind5
Nummer4
Sider (fra-til)487-494
Antal sider8
DOI
StatusUdgivet - apr. 2021

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