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Bimodal diel pattern in peatland ecosystem respiration rebuts uniform temperature response

Järveoja, Järvi and Nilsson, Mats and Crill, Patrick M. and Peichl, Matthias (2020). Bimodal diel pattern in peatland ecosystem respiration rebuts uniform temperature response. Nature Communications. 11 , 4255
[Journal article]

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Abstract

Accurate projections of climate change impacts on the vast carbon stores of northern peatlands require detailed knowledge of ecosystem respiration (ER) and its heterotrophic (Rh) and autotrophic (Ra) components. Currently, however, standard flux measurement techniques, i.e. eddy covariance and manual chambers, generate empirical ER data during only night- or daytime, respectively, which are extrapolated to the daily scale based on the paradigm that assumes a uniform diel temperature response. Here, using continuous autochamber measurements, we demonstrate a distinct bimodal pattern in diel peatland ER which contrasts the unimodal pattern inherent to the classical assumption. This feature results from divergent temperature dependencies of day- and nighttime ER due to varying contributions from Rh and Ra. We further find that disregarding these bimodal dynamics causes significant bias in ER estimates across multiple temporal scales. This calls for improved process-based understanding of ER to advance our ability to simulate peatland carbon cycle-climate feedbacks.

Authors/Creators:Järveoja, Järvi and Nilsson, Mats and Crill, Patrick M. and Peichl, Matthias
Title:Bimodal diel pattern in peatland ecosystem respiration rebuts uniform temperature response
Year of publishing :2020
Volume:11
Article number:4255
Number of Pages:9
ISSN:2041-1723
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
URN:NBN:urn:nbn:se:slu:epsilon-p-107884
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107884
Additional ID:
Type of IDID
DOI10.1038/s41467-020-18027-1
Web of Science (WoS)000567549300003
ID Code:17611
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:28 Sep 2020 09:45
Metadata Last Modified:28 Sep 2020 09:51

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