Effect of soil microorganisms and labile C availability on soil respiration in response to litter inputs in forest ecosystems: A meta‐analysis

Zhang, Yanjun; Zou, Junliang; Meng, Delong; Dang, Suzhen; Zhou, Jinhong; Osborne, Bruce; Ren, Yuanyuan; Liang, Tao; Yu, Keke

doi:10.1002/ece3.6965

Cited by 51 publications

(22 citation statements)

References 52 publications

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“…The bacterial diversity index of soil under moderately rotten fallen wood was signi cantly higher than that under other rotten grades, and the bacterial species diversity index of the control group was the lowest. This is similar to the research results of Wang Liyan 48 and Zhang 49 on soil bacterial community by adding litter. Carbon input in a certain range has great changes in microbial community structure, but beyond a certain range, it can inhibit microbial activity.…”

Section: Discussionsupporting

confidence: 91%

Significant Effects of Dead Trees on Active Organic Carbon Components and Microbial Communities in Subtropical Forests

Jiang

Dang

Yan

et al. 2022

Preprint

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As a vital component of the forest ecosystem, dead wood plays an important role in forest regeneration, species variety, water conservation, soil erosion avoidance, and the carbon cycle. At the moment, dead wood research is mostly concerned with the storage of dead wood in forests and the change of nutritional components throughout the decomposition process. There have been few investigations on the changes in soil active organic carbon components and bacterial community structure during the breakdown of dead wood. To investigate the impact of dead wood on soil active organic carbon components and the structure of microbial communities. we selected the soil under three different decay grades of Castanopsis eyrei dead wood and the forest soil without dead wood as the control. The basic physical and chemical indexes of soil, the composition of soil active organic carbon and the structure of microbial community were measured. Compared with the control group, dead wood mulching significantly increased the content of soil organic carbon and total nitrogen (P < 0.05), and dead wood significantly affected the content of soil active organic carbon (P < 0.05). The easily oxidized organic carbon, microbial biomass carbon and organic carbon under the severe decay dead wood were significantly higher than those in the control (P < 0.05), and the content of activated carbon increased with the increase of decay grade. The relative abundance of Actinobacteria, Chloroflexi, WPS-2, Patescibacteria and Bacteroidetes increased with the increase of decay grade of dead wood, and the relative abundance of soil bacteria under dead wood was higher than that of the control. Through the redundancy analysis of environmental factors and soil microbial community, we found soil total nitrogen and pH are the key factors driving microbial community. The distribution of soil bacterial community under light rotten dead wood is similar to that soil without dead wood, which is significantly different from that under moderate and severe rotten dead wood. The abundance of soil bacterial community and soil active organic carbon components are most affected by heavy rotten dead wood. Soil active organic carbon was significantly negatively correlated with Acidobacteria(P < 0.01), and positively correlated with Ktedonobacteria, Bacteroidia, Saccharimonadia and TK10(P < 0.05). The above research results show that dead wood has a great impact on soil physical and chemical properties and microbial community structure. Our study improves the impact of dead wood on soil activated carbon components and microbial community, and provides a theoretical basis for sustainable forest management.

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Section: Discussionsupporting

confidence: 91%

Significant Effects of Dead Trees on Active Organic Carbon Components and Microbial Communities in Subtropical Forests

Jiang

Dang

Yan

et al. 2022

Preprint

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“…Climatic variables individually accounted for 24% of the overall variations in microbial biomass under aboveground litter removal, whereas the experimental duration and DOC explained 50.2% of changes in microbial biomass under root exclusion. Although litter exclusion significantly influences soil temperature and soil moisture (Xu et al 2013;Zhang et al 2020), which may alter microbial responses due to their close linkages (Wang et al 2019;Rasmussen et al 2020), we did not observe these soil properties influence microbial response to litter exclusion based on our limited number of observations (Table S1). This finding further brings a challenge to describe the effects of multiple drivers on the response ratio of microbial biomass, which is similar to many other meta-analysis studies that lacking sufficient associated measurements (Ren et al 2017;Yang et al 2020).…”

Section: Different Factors Controlling the Responses Of Microbial Bio...mentioning

confidence: 78%

Effects of root dominate over aboveground litter on soil microbial biomass in global forest ecosystems

et al. 2021

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Background Inputs of above- and belowground litter into forest soils are changing at an unprecedented rate due to continuing human disturbances and climate change. Microorganisms drive the soil carbon (C) cycle, but the roles of above- and belowground litter in regulating the soil microbial community have not been evaluated at a global scale. Methods Here, we conducted a meta-analysis based on 68 aboveground litter removal and root exclusion studies across forest ecosystems to quantify the roles of above- and belowground litter on soil microbial community and compare their relative importance. Results Aboveground litter removal significantly declined soil microbial biomass by 4.9% but root exclusion inhibited it stronger, up to 11.7%. Moreover, the aboveground litter removal significantly raised fungi by 10.1% without altering bacteria, leading to a 46.7% increase in the fungi-to-bacteria (F/B) ratio. Differently, root exclusion significantly decreased the fungi by 26.2% but increased the bacteria by 5.7%, causing a 13.3% decrease in the F/B ratio. Specifically, root exclusion significantly inhibited arbuscular mycorrhizal fungi, ectomycorrhizal fungi, and actinomycetes by 22.9%, 43.8%, and 7.9%, respectively. The negative effects of aboveground litter removal on microbial biomass increased with mean annual temperature and precipitation, whereas that of root exclusion on microbial biomass did not change with climatic factors but amplified with treatment duration. More importantly, greater effects of root exclusion on microbial biomass than aboveground litter removal were consistent across diverse forest biomes (expect boreal forests) and durations. Conclusions These data provide a global evidence that root litter inputs exert a larger control on microbial biomass than aboveground litter inputs in forest ecosystems. Our study also highlights that changes in above- and belowground litter inputs could alter soil C stability differently by shifting the microbial community structure in the opposite direction. These findings are useful for predicting microbe-mediated C processes in response to changes in forest management or climate.

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“…2020); (3) that changes in land cover could influence soil respiration through its impact on abiotic factors, such as SOC availability through alteration in C inputs via litter and rhizodeposition (Zhang et al. 2015, 2020 a , d ). In support of this, conversion of croplands into the different land uses examined in this study resulted in an increase in SOC of 27.1–352%, which was similar to previous research results (Deng et al.…”

Section: Discussionmentioning

confidence: 99%

“…2015 b , Zhang et al. 2020 d ). Of the factors that can influence soil respiration, land‐use changes associated with terrestrial ecosystems are often considered as one of the more significant contributors to atmospheric CO 2 concentrations (IPCC 2013) and have been widely recognized as a key driver of global C cycling.…”

Section: Introductionmentioning

confidence: 99%

“…Approximately 100 Pg C is released into the atmosphere every year in the form of soil respiration, which is far greater than the amount of carbon released by fossil fuel combustion (Ben andAllison 2010, IPCC 2013), so small changes in soil respiration over large areas could have a significant impact on annual atmospheric CO 2 increases (Wang et al 2015b, Zhang et al 2020d. Of the factors that can influence soil respiration, land-use changes associated with terrestrial ecosystems are often considered as one of the more significant contributors to atmospheric CO 2 concentrations (IPCC 2013) and have been widely recognized as a key driver of global C cycling.…”

Section: Introductionmentioning

confidence: 99%

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Topography modifies the effect of land‐use change on soil respiration: A meta‐analysis

et al. 2021

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Soil respiration is controlled by land‐use changes associated with cropland vegetation restoration, and this can vary with topography, although the magnitude of this effect and the underlying mechanisms are still unclear. We synthesized 69 recently published papers from China to explore the influence of topography‐related changes in land use on soil respiration where croplands were converted into orchards (abbreviated as C‐O), grasslands (abbreviated as C‐G), or woodlands (abbreviated as C‐W). Our results showed that not only did land‐use change have a significant influence on soil respiration, but this varied with topography. While C‐O resulted in a decrease in soil respiration by, on average, 3.1%, both the magnitude and sign of the change varied with topography, with an 8.2% increase for flat areas and a 14.7% decrease for slopes. For the C‐G conversions, soil respiration increased, on average, by 21.4%, with a 19.5% and a 24.3% increase for flat and slope topography, respectively. For C‐W, soil respiration increased, on average, by 28.0%, with only a 1.6% increase for flat areas, but a 39.9% increase for slopes. Soil temperature, soil moisture, root biomass, soil organic carbon (SOC), soil microbial biomass carbon (MBC), soil carbon‐to‐nitrogen ratio (C:N ratio), and soil density also varied with topography, with larger changes for slopes than for flat topography. Increases in soil respiration associated with different topography were closely related to changes in soil temperature, SOC, MBC, and root biomass (P < 0.05), but were not correlated with changes in soil moisture, C:N ratio, or soil density (P > 0.05). The contribution of different drivers to the change in soil respiration under different topographical conditions showed a trend of SOC > root biomass > MBC > soil temperature. Based on these results, topography‐related variations in soil respiration need to be accounted for when quantifying the impact of land‐use change in C budgets.

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Effect of soil microorganisms and labile C availability on soil respiration in response to litter inputs in forest ecosystems: A meta‐analysis

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 51 publications

References 52 publications

Significant Effects of Dead Trees on Active Organic Carbon Components and Microbial Communities in Subtropical Forests

Significant Effects of Dead Trees on Active Organic Carbon Components and Microbial Communities in Subtropical Forests

Effects of root dominate over aboveground litter on soil microbial biomass in global forest ecosystems

Topography modifies the effect of land‐use change on soil respiration: A meta‐analysis

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