Soil respiration under climate warming differential response of heterotrophic and autotrophic respiration

Soil respiration under climate warming : differential response of heterotrophic and autotrophic respiration

© 2014 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 20(2014), 10 vom: 15. Okt., Seite 3229-37
1. Verfasser: Wang, Xin (VerfasserIn)
Weitere Verfasser: Liu, Lingli, Piao, Shilong, Janssens, Ivan A, Tang, Jianwu, Liu, Weixing, Chi, Yonggang, Wang, Jing, Xu, Shan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Meta-Analysis Research Support, Non-U.S. Gov't acclimation apparent Q10 ecosystem warming forest grassland mediterranean meta-analysis mehr... soil moisture tundra warming duration
Beschreibung
Zusammenfassung:© 2014 John Wiley & Sons Ltd.
Despite decades of research, how climate warming alters the global flux of soil respiration is still poorly characterized. Here, we use meta-analysis to synthesize 202 soil respiration datasets from 50 ecosystem warming experiments across multiple terrestrial ecosystems. We found that, on average, warming by 2 °C increased soil respiration by 12% during the early warming years, but warming-induced drought partially offset this effect. More significantly, the two components of soil respiration, heterotrophic respiration and autotrophic respiration showed distinct responses. The warming effect on autotrophic respiration was not statistically detectable during the early warming years, but nonetheless decreased with treatment duration. In contrast, warming by 2 °C increased heterotrophic respiration by an average of 21%, and this stimulation remained stable over the warming duration. This result challenged the assumption that microbial activity would acclimate to the rising temperature. Together, our findings demonstrate that distinguishing heterotrophic respiration and autotrophic respiration would allow us better understand and predict the long-term response of soil respiration to warming. The dependence of soil respiration on soil moisture condition also underscores the importance of incorporating warming-induced soil hydrological changes when modeling soil respiration under climate change
Beschreibung:Date Completed 20.05.2015
Date Revised 13.09.2014
published: Print-Electronic
Citation Status MEDLINE
ISSN:1365-2486
DOI:10.1111/gcb.12620