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

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, w...

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Bibliographic Details
Published in:Global Change Biology
Main Authors: Wang, Xin, Liu, Lingli, Piao, Shilong, Janssens, Ivan A., Tang, Jianwu, Liu, Weixing, Chi, Yonggang, Wang, Jing, Xu, Shan
Other Authors: Liu, LL (reprint author), Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China., Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China., Univ Chinese Acad Sci, Beijing 100049, Peoples R China., Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China., Univ Antwerp, Dept Biol, Res Grp Plant & Vegetat Ecol, B-2610 Antwerp, Belgium., Marine Biol Lab, Ecosyst Ctr, Woods Hole, MA 02543 USA.
Format: Journal/Newspaper
Language:English
Published: 全球变化生物学 2014
Subjects:
acclimation
apparent Q10
ecosystem warming
forest
grassland
mediterranean
meta-analysis
soil moisture
tundra
warming duration
ECOSYSTEM CARBON FLUXES
CO2 EFFLUX
TEMPERATURE SENSITIVITY
MICROBIAL RESPIRATION
GRASSLAND ECOSYSTEM
THERMAL ADAPTATION
WATER AVAILABILITY
ELEVATED CO2
CYCLE
Tundra
Online Access:https://hdl.handle.net/20.500.11897/208624
https://doi.org/10.1111/gcb.12620
Description
Summary: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 degrees 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 degrees 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. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000342168500019&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Biodiversity Conservation Ecology Environmental Sciences SCI(E) 17 ARTICLE lingli.liu@ibcas.ac.cn 10 3229-3237 20

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