Global patterns of soil heterotrophic respiration – A meta-analysis of available dataset

Tang, Xiaolu; Du, Jie; Shi, Yuehong; Lei, Ningfei; Chen, Guo; Cao, Longxi; Pei, Xiangjun

doi:10.1016/j.catena.2020.104574

Cited by 37 publications

(16 citation statements)

References 49 publications

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“…In Boreal forests, and in contrast to our expectation of a positive temperature influence on CH 4 uptake, spatial variations in soil CH 4 flux were associated with soil drivers but not with climatic drivers. When the temperature is predominantly low, both CH 4 and O 2 diffusion into soils are not limited, but biological oxidation is limited due to low microbial activity (Fang et al., 2010; Tang et al, 2020). Thus, in Boreal forests, CH 4 oxidation would be enhanced when soil variables may promote microbial activity such as an increase of carbon substrate (high SOC) in addition to alkaline soil conditions (high pH; Fang et al., 2010; Ullah, Frasier, Pelletier, & Moore, 2009; Ullah & Moore, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Dark grey shades in (a) show the spatial distribution of the world forests according to FAO. Colour dots in both panels indicate the correspondence between each observational site and biome categories according to Whittaker classification [Colour figure can be viewed at wileyonlinelibrary.com] resolution (Shangguan, Dai, Duan, Liu, & Yuan, 2014). The soil data included SOC (%), soil total nitrogen (STN, %), soil pH (measured in water), sand, clay and silt content (all in %), and BD (g/cm 3 in volume).…”

Section: Soil and Climate Factorsmentioning

confidence: 99%

“…and (b) To what extent do the magnitude and direction of these variables differ among biomes? At the global scale, the soil net CH 4 flux in forests could be mainly determined by climatic drivers because they are the main controlling factors on both microbial activity/abundance (including methanotrophs and methanogens which consume and produce CH 4 , respectively) and soil water balance (Serna‐Chavez, Fierer, & Van Bodegom, 2013; Tang et al, 2020). Nevertheless, soil chemical and physical properties may modulate the effects of precipitation and temperature on water balance and ultimately affect soil net CH 4 flux (Del Grosso et al., 2000).…”

Section: Introductionmentioning

confidence: 99%

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Environmental and anthropogenic drivers of soil methane fluxes in forests: Global patterns and among‐biomes differences

Gatica

Fernández

Juliarena

et al. 2020

Global Change Biology

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Forest soils are the most important terrestrial sink of atmospheric methane (CH 4). Climatic, soil and anthropogenic drivers affect CH 4 fluxes, but it is poorly known the relative weight of each driver and whether all drivers have similar effects across forest biomes. We compiled a database of 478 in situ estimations of CH 4 fluxes in forest soils from 191 peer-reviewed studies. All forest biomes (boreal, temperate, tropical and subtropical) but savannahs act on average as CH 4 sinks, which presented positive fluxes in 65% of the sites. Mixed effects models showed that combined climatic and edaphic variables had the best support, but anthropogenic factors did not have a significant effect on CH 4 fluxes at global scale. This model explained only 19% of the variance in soil CH 4 flux which decreased with declines in precipitation and increases in temperature, and with increases in soil organic carbon, bulk density and soil acidification. The effects of these drivers were inconsistent across biomes, increasing the model explanation of observed variance to 34% when the drivers have a different slope for each biome. Despite this limited explanatory value which could be related to the use of soil variables calculated at coarse scale (~1 km), our study shows that soil CH 4 fluxes in forests are determined by different environmental variables in different biomes. The most sensitive system to all studied drivers were the temperate forests, while boreal forests were insensitive to climatic variables, but highly sensitive to edaphic factors. Subtropical forests and savannahs responded similarly to climatic variables, but differed in their response to soil factors. Our results suggest that the increase in temperature predicted in the framework of climate change would promote CH 4 emission (or reduce CH 4 sink) in subtropical and savannah forests, have no influence in boreal and temperate forests and promote uptake in tropical forests. K E Y W O R D S CH 4 emission, CH 4 uptake, global change, greenhouse gases (GHG), native forest, planted forest, static chamber 1 | INTRODUC TI ON Methane (CH 4) is a greenhouse gas (GHG) with a radiative forcing 28 times stronger than carbon dioxide (CO 2) and, therefore, with a high impact on global warming (IPCC, 2014). It is produced naturally in wetlands and lakes, but 75% of CH 4 emissions are from anthropogenic sources such as fossil fuel combustion, irrigated rice cultivation, enteric fermentation of domestic ruminants, biomass burning | 6605 GATICA eT Al.

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Section: Discussionmentioning

confidence: 99%

Section: Soil and Climate Factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental and anthropogenic drivers of soil methane fluxes in forests: Global patterns and among‐biomes differences

Gatica

Fernández

Juliarena

et al. 2020

Global Change Biology

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“…Vegetation cover indices based on remote sensing are often used as important inputs in models used to estimate land surface temperature, rainfall, and net respiration productivity (X. Li et al, 2019;Tang et al, 2020). Thus, the FVCI was selected in this study as one of the remotely sensed indicators of healthy socioeconomic development in povertystricken counties.…”

Section: Selection and Construction Of Remotely Sensed Evaluation Indicatorsmentioning

confidence: 99%

Socioeconomic development evaluation for Chinese poverty-stricken counties using indices derived from remotely sensed data

Xiang

Xiao

2021

European Journal of Remote Sensing

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“…component respiration fluxes, particularly MR, is critical for accurately quantifying and projecting the terrestrial C-climate feedbacks (Bond-Lamberty & Thomson, 2010;Bond-Lamberty et al, 2004;Schlesinger & Andrews, 2000;Tang et al, 2020;Xu et al, 2013Xu et al, , 2014Xu et al, , 2017.…”

mentioning

confidence: 99%

Microbial seasonality promotes soil respiratory carbon emission in natural ecosystems: A modeling study

Lai

Mayes

et al. 2021

Global Change Biology

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Soil respiration (SR), the second largest terrestrial carbon (C) flux, has been increasing over the last five decades and is projected to further increase under a warming climate (Bond-Lamberty & Thomson, 2010;Schlesinger & Andrews, 2000). The SR is the sum of C emission from soil organisms and plant roots from the soil surface to the atmosphere, with approximately 2/3 contributed by soil organisms, primarily soil microbes (i.e., microbial respiration, MR), and the rest from plant roots (i.e., root respiration, RR; Bond-

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Global patterns of soil heterotrophic respiration – A meta-analysis of available dataset

Cited by 37 publications

References 49 publications

Environmental and anthropogenic drivers of soil methane fluxes in forests: Global patterns and among‐biomes differences

Environmental and anthropogenic drivers of soil methane fluxes in forests: Global patterns and among‐biomes differences

Socioeconomic development evaluation for Chinese poverty-stricken counties using indices derived from remotely sensed data

Microbial seasonality promotes soil respiratory carbon emission in natural ecosystems: A modeling study

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