Dataset Information

Substantial hysteresis in emergent temperature sensitivity of global wetland CH₄ emissions.

ABSTRACT: Wetland methane (CH₄) emissions ([Formula: see text]) are important in global carbon budgets and climate change assessments. Currently, [Formula: see text] projections rely on prescribed static temperature sensitivity that varies among biogeochemical models. Meta-analyses have proposed a consistent [Formula: see text] temperature dependence across spatial scales for use in models; however, site-level studies demonstrate that [Formula: see text] are often controlled by factors beyond temperature. Here, we evaluate the relationship between [Formula: see text] and temperature using observations from the FLUXNET-CH₄ database. Measurements collected across the globe show substantial seasonal hysteresis between [Formula: see text] and temperature, suggesting larger [Formula: see text] sensitivity to temperature later in the frost-free season (about 77% of site-years). Results derived from a machine-learning model and several regression models highlight the importance of representing the large spatial and temporal variability within site-years and ecosystem types. Mechanistic advancements in biogeochemical model parameterization and detailed measurements in factors modulating CH₄ production are thus needed to improve global CH₄ budget assessments.

SUBMITTER: Chang KY

PROVIDER: S-EPMC8050324 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature

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Publications

Substantial hysteresis in emergent temperature sensitivity of global wetland CH<sub>4</sub> emissions.

Chang Kuang-Yu KY Riley William J WJ Knox Sara H SH Jackson Robert B RB McNicol Gavin G Poulter Benjamin B Aurela Mika M Baldocchi Dennis D Bansal Sheel S Bohrer Gil G Campbell David I DI Cescatti Alessandro A Chu Housen H Delwiche Kyle B KB Desai Ankur R AR Euskirchen Eugenie E Friborg Thomas T Goeckede Mathias M Helbig Manuel M Hemes Kyle S KS Hirano Takashi T Iwata Hiroki H Kang Minseok M Keenan Trevor T Krauss Ken W KW Lohila Annalea A Mammarella Ivan I Mitra Bhaskar B Miyata Akira A Nilsson Mats B MB Noormets Asko A Oechel Walter C WC Papale Dario D Peichl Matthias M Reba Michele L ML Rinne Janne J Runkle Benjamin R K BRK Ryu Youngryel Y Sachs Torsten T Schäfer Karina V R KVR Schmid Hans Peter HP Shurpali Narasinha N Sonnentag Oliver O Tang Angela C I ACI Torn Margaret S MS Trotta Carlo C Tuittila Eeva-Stiina ES Ueyama Masahito M Vargas Rodrigo R Vesala Timo T Windham-Myers Lisamarie L Zhang Zhen Z Zona Donatella D

Nature communications 20210415 1

Wetland methane (CH<sub>4</sub>) emissions ([Formula: see text]) are important in global carbon budgets and climate change assessments. Currently, [Formula: see text] projections rely on prescribed static temperature sensitivity that varies among biogeochemical models. Meta-analyses have proposed a consistent [Formula: see text] temperature dependence across spatial scales for use in models; however, site-level studies demonstrate that [Formula: see text] are often controlled by factors beyond t ...[more]

PMID: 33859182

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Project description:The soil microbiome is a driver of nitrous oxide (N2O) emissions in terrestrial ecosystems. Identifying the core microbiome of N2O emissions and its temperature sensitivity from trillions of soil microorganisms is a great challenge and is essential to improving the predictability of soil-climate feedback related to increasing temperature. Here, the integrated soil microbiome covering archaeal, bacterial, fungal, algal, and microfaunal communities was studied to disengage the potential linkage with its N2O emissions and its temperature sensitivity in paddy fields by hunting for core species pairs. The results showed that between-group interactions of core bacterial and archaeal members and the within-group interactions of core bacterial members jointly contributed to the N2O emissions and its temperature sensitivity. The contribution of between-group interactions (32 to 33%) was greater than that of within groups (10 to 18%). These results suggested that N2O emissions and their fluctuations related to climate warming are affected by the within- and between-group interactions of the soil microbiome. Our results help advance the knowledge on the importance of microbial keystone species and network associations in controlling N2O production and their responses to increasing temperature. IMPORTANCE Soil microorganisms drive emissions of nitrous oxide from soils; this is a powerful greenhouse gas and the dominant ozone-depleting agent. N2O emissions can be partly predicted from soil properties and specific microbial groups, whereas a possible role of below-ground microbial interactions has largely been overlooked. Here, the integrated soil microbiome covering archaeal, bacterial, fungal, algal, and microfaunal communities was studied to disengage the potential linkage with the N2O emissions and temperature sensitivity of the microbiome in paddy fields by hunting for core species pairs. The results showed that between-group interactions of core bacterial and archaeal members and the within-group interactions of core bacterial members jointly contributed to the N2O emissions. The contribution of between-group interactions (32 to 33%) was greater than that of within-group interactions (10 to 18%). Our results help advance the knowledge on the importance of microbial keystone species and interactions in controlling N2O production and their responses to increasing temperature.

Dataset Information

Substantial hysteresis in emergent temperature sensitivity of global wetland CH₄ emissions.

Publications

Substantial hysteresis in emergent temperature sensitivity of global wetland CH<sub>4</sub> emissions.

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Dataset Information

Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions.

Publications

Substantial hysteresis in emergent temperature sensitivity of global wetland CH<sub>4</sub> emissions.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Substantial hysteresis in emergent temperature sensitivity of global wetland CH₄ emissions.