Aboveground and belowground contributions to ecosystem respiration in a temperate deciduous forest

Xiuping Liu; Wenxu Dong; Jeffrey D. Wood; Yuying Wang; Xiaoxin Li; Yuming Zhang; Chunsheng Hu; Lianhong Gu

doi:10.1016/j.agrformet.2022.108807

Aboveground and belowground contributions to ecosystem respiration in a temperate deciduous forest

Xiuping Liu, Wenxu Dong, Jeffrey D. Wood, Yuying Wang, Xiaoxin Li, Yuming Zhang, Chunsheng Hu, Lianhong Gu

Ecosystem Processes

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4 Scopus citations

Abstract

In this study, we developed a three-way carbon dioxide (CO₂) flux-partitioning algorithm that separates net ecosystem exchange (NEE) into aboveground plant respiration (R_above), belowground root and soil respiration (R_below), and gross primary production (GPP). We applied this algorithm to a coupled dataset of continuous chamber-measured soil respiration and eddy covariance (EC)-measured NEE of CO₂ in an oak-hickory (Quercus-Carya) deciduous broadleaf forest from 2006 to 2015. We found that on annual time scale, R_below dominated over R_above with the former accounting for 66.9–86.4% and the latter 13.6–33.1%, of the total ecosystem respiration (R_eco). The ratio of R_below to R_above varied seasonally, ranging from 1.77 to 7.25 in growing season, and 1.02 to 4.57 in non-growing season. The temperature sensitivity (E₀) of R_below was significantly higher than that of R_above, and E₀ of R_eco responded differently to air and soil temperature. Over the whole study period, annual mean R_above, R_below, and GPP were 243, 806, and 1170 g C m⁻², respectively, with annual R_eco accounting for 89.6% of GPP, of which 68.8% was lost as R_below and 20.8% lost as R_above, and leaving only 10% of the carbon fixation in ecosystems. These estimates, however, did not consider potential light inhibition of leaf respiration. If we accept the presence of light inhibition, then the daytime three-way partitioning method would underestimate annual R_above by 20.4% whereas the nighttime method would overestimate R_above by 23.9% and GPP by 4.7%, compared with estimates accounting for light inhibition in leaves.

Original language	English
Article number	108807
Journal	Agricultural and Forest Meteorology
Volume	314
DOIs	https://doi.org/10.1016/j.agrformet.2022.108807
State	Published - Mar 1 2022

Funding

This manuscript has been co-authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the US Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). This research was supported by the Natural Science Foundation of Hebei Province ( D2021503009 ), the “Strategic Priority Research Program” of the Chinese Academy of Sciences (XDA28020303, XDA26040103), the National Key Research and Development Program of China (2016YFC0500802) and Visiting Scholars Program of Chinese Academy of Sciences. LG is supported by the U.S. Department of Energy (DOE), Office of Science, Biological and Environmental Research Program. ORNL is managed by UT-Battelle, LLC, for DOE under contract DE-AC05-00OR22725.

Keywords

Flux partitioning
MOFLUX
Net ecosystem exchange
Soil respiration
Temperature sensitivity

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10.1016/j.agrformet.2022.108807

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title = "Aboveground and belowground contributions to ecosystem respiration in a temperate deciduous forest",

abstract = "In this study, we developed a three-way carbon dioxide (CO2) flux-partitioning algorithm that separates net ecosystem exchange (NEE) into aboveground plant respiration (Rabove), belowground root and soil respiration (Rbelow), and gross primary production (GPP). We applied this algorithm to a coupled dataset of continuous chamber-measured soil respiration and eddy covariance (EC)-measured NEE of CO2 in an oak-hickory (Quercus-Carya) deciduous broadleaf forest from 2006 to 2015. We found that on annual time scale, Rbelow dominated over Rabove with the former accounting for 66.9–86.4\% and the latter 13.6–33.1\%, of the total ecosystem respiration (Reco). The ratio of Rbelow to Rabove varied seasonally, ranging from 1.77 to 7.25 in growing season, and 1.02 to 4.57 in non-growing season. The temperature sensitivity (E0) of Rbelow was significantly higher than that of Rabove, and E0 of Reco responded differently to air and soil temperature. Over the whole study period, annual mean Rabove, Rbelow, and GPP were 243, 806, and 1170 g C m−2, respectively, with annual Reco accounting for 89.6\% of GPP, of which 68.8\% was lost as Rbelow and 20.8\% lost as Rabove, and leaving only 10\% of the carbon fixation in ecosystems. These estimates, however, did not consider potential light inhibition of leaf respiration. If we accept the presence of light inhibition, then the daytime three-way partitioning method would underestimate annual Rabove by 20.4\% whereas the nighttime method would overestimate Rabove by 23.9\% and GPP by 4.7\%, compared with estimates accounting for light inhibition in leaves.",

keywords = "Flux partitioning, MOFLUX, Net ecosystem exchange, Soil respiration, Temperature sensitivity",

author = "Xiuping Liu and Wenxu Dong and Wood, \{Jeffrey D.\} and Yuying Wang and Xiaoxin Li and Yuming Zhang and Chunsheng Hu and Lianhong Gu",

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T1 - Aboveground and belowground contributions to ecosystem respiration in a temperate deciduous forest

AU - Liu, Xiuping

AU - Dong, Wenxu

AU - Wood, Jeffrey D.

AU - Wang, Yuying

AU - Li, Xiaoxin

AU - Zhang, Yuming

AU - Hu, Chunsheng

AU - Gu, Lianhong

PY - 2022/3/1

Y1 - 2022/3/1

N2 - In this study, we developed a three-way carbon dioxide (CO2) flux-partitioning algorithm that separates net ecosystem exchange (NEE) into aboveground plant respiration (Rabove), belowground root and soil respiration (Rbelow), and gross primary production (GPP). We applied this algorithm to a coupled dataset of continuous chamber-measured soil respiration and eddy covariance (EC)-measured NEE of CO2 in an oak-hickory (Quercus-Carya) deciduous broadleaf forest from 2006 to 2015. We found that on annual time scale, Rbelow dominated over Rabove with the former accounting for 66.9–86.4% and the latter 13.6–33.1%, of the total ecosystem respiration (Reco). The ratio of Rbelow to Rabove varied seasonally, ranging from 1.77 to 7.25 in growing season, and 1.02 to 4.57 in non-growing season. The temperature sensitivity (E0) of Rbelow was significantly higher than that of Rabove, and E0 of Reco responded differently to air and soil temperature. Over the whole study period, annual mean Rabove, Rbelow, and GPP were 243, 806, and 1170 g C m−2, respectively, with annual Reco accounting for 89.6% of GPP, of which 68.8% was lost as Rbelow and 20.8% lost as Rabove, and leaving only 10% of the carbon fixation in ecosystems. These estimates, however, did not consider potential light inhibition of leaf respiration. If we accept the presence of light inhibition, then the daytime three-way partitioning method would underestimate annual Rabove by 20.4% whereas the nighttime method would overestimate Rabove by 23.9% and GPP by 4.7%, compared with estimates accounting for light inhibition in leaves.

AB - In this study, we developed a three-way carbon dioxide (CO2) flux-partitioning algorithm that separates net ecosystem exchange (NEE) into aboveground plant respiration (Rabove), belowground root and soil respiration (Rbelow), and gross primary production (GPP). We applied this algorithm to a coupled dataset of continuous chamber-measured soil respiration and eddy covariance (EC)-measured NEE of CO2 in an oak-hickory (Quercus-Carya) deciduous broadleaf forest from 2006 to 2015. We found that on annual time scale, Rbelow dominated over Rabove with the former accounting for 66.9–86.4% and the latter 13.6–33.1%, of the total ecosystem respiration (Reco). The ratio of Rbelow to Rabove varied seasonally, ranging from 1.77 to 7.25 in growing season, and 1.02 to 4.57 in non-growing season. The temperature sensitivity (E0) of Rbelow was significantly higher than that of Rabove, and E0 of Reco responded differently to air and soil temperature. Over the whole study period, annual mean Rabove, Rbelow, and GPP were 243, 806, and 1170 g C m−2, respectively, with annual Reco accounting for 89.6% of GPP, of which 68.8% was lost as Rbelow and 20.8% lost as Rabove, and leaving only 10% of the carbon fixation in ecosystems. These estimates, however, did not consider potential light inhibition of leaf respiration. If we accept the presence of light inhibition, then the daytime three-way partitioning method would underestimate annual Rabove by 20.4% whereas the nighttime method would overestimate Rabove by 23.9% and GPP by 4.7%, compared with estimates accounting for light inhibition in leaves.

KW - Flux partitioning

KW - MOFLUX

KW - Net ecosystem exchange

KW - Soil respiration

KW - Temperature sensitivity

UR - https://www.scopus.com/pages/publications/85122500863

U2 - 10.1016/j.agrformet.2022.108807

DO - 10.1016/j.agrformet.2022.108807

M3 - Article

AN - SCOPUS:85122500863

SN - 0168-1923

VL - 314

JO - Agricultural and Forest Meteorology

JF - Agricultural and Forest Meteorology

M1 - 108807

ER -

Aboveground and belowground contributions to ecosystem respiration in a temperate deciduous forest

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