Precipitation affects soil microbial and extracellular enzymatic responses to warming

Li, Guanlin; Kim, Seongjun; Han, Seung Hyun; Chang, Hyo Ihl; Du, Daolin; Son, Yowhan

doi:10.1016/j.soilbio.2018.02.014

Cited by 83 publications

(40 citation statements)

References 52 publications

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“…Here, iCAMP further revealed that warming gradually enhanced homogeneous selection and decreased drift in bacterial community assembly, and that the warming-induced selection was enhanced by drought and lower plant biomass, besides the soil temperature. These results are consistent with several previous studies showing that the effects of warming on microbial communities intertwines with precipitation/drought [46][47][48][49] and plant variables 50 . In addition, our results showed that the warmingenhanced homogeneous selection was mainly attributed to the positive responses of a group of Bacillales in Firmicutes, which are ubiquitous Gram-positive bacteria in nature.…”

Section: W W W P P P P P P S S T T W T P T W T S S W P P W P T P T W supporting

confidence: 93%

A quantitative framework reveals ecological drivers of grassland microbial community assembly in response to warming

et al. 2020

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Unraveling the drivers controlling community assembly is a central issue in ecology. Although it is generally accepted that selection, dispersal, diversification and drift are major community assembly processes, defining their relative importance is very challenging. Here, we present a framework to quantitatively infer community assembly mechanisms by phylogenetic bin-based null model analysis (iCAMP). iCAMP shows high accuracy (0.93–0.99), precision (0.80–0.94), sensitivity (0.82–0.94), and specificity (0.95–0.98) on simulated communities, which are 10–160% higher than those from the entire community-based approach. Application of iCAMP to grassland microbial communities in response to experimental warming reveals dominant roles of homogeneous selection (38%) and ‘drift’ (59%). Interestingly, warming decreases ‘drift’ over time, and enhances homogeneous selection which is primarily imposed on Bacillales. In addition, homogeneous selection has higher correlations with drought and plant productivity under warming than control. iCAMP provides an effective and robust tool to quantify microbial assembly processes, and should also be useful for plant and animal ecology.

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Section: W W W P P P P P P S S T T W T P T W T S S W P P W P T P T W supporting

confidence: 93%

A quantitative framework reveals ecological drivers of grassland microbial community assembly in response to warming

et al. 2020

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“…Climate changes will ultimately result in variations in microbial community diversity (Delgado-Baquerizo et al, 2016) and in its capability to decompose organic matter through the use of microbial extracellular enzymes (Gonzalez et al, 2015;Hammerl et al, 2019;Li et al, 2018;Moxley et al, 2019;Wallenstein & Weintraub, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies reported that precipitation causes wetting events or water pulses in dry soils which induce great increase of microbial and extracellular enzyme activities (Austin et al, 2004;Hammerl et al, 2019;Li et al, 2018;Schwinning & Sala, 2004;Wallenstein & Weintraub, 2008). On the other side, increased temperatures and dryness were cited to induce a suppression of microbial activity (Allison & Treseder, 2008).…”

mentioning

confidence: 99%

Environmental factors affect the response of microbial extracellular enzyme activity in soils when determined as a function of water availability and temperature

Gómez

Delgado

Gonzalez

2020

Ecology and Evolution

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Microorganisms govern soil carbon cycling with critical effects at local and global scales. The activity of microbial extracellular enzymes is generally the limiting step for soil organic matter mineralization. Nevertheless, the influence of soil characteristics and climate parameters on microbial extracellular enzyme activity (EEA) performance at different water availabilities and temperatures remains to be detailed. Different soils from the Iberian Peninsula presenting distinctive climatic scenarios were sampled for these analyses. Results showed that microbial EEA in the mesophilic temperature range presents optimal rates under wet conditions (high water availability) while activity at the thermophilic temperature range (60°C) could present maximum EEA rates under dry conditions if the soil is frequently exposed to high temperatures. Optimum water availability conditions for maximum soil microbial EEA were influenced mainly by soil texture. Soil properties and climatic parameters are major environmental components ruling soil water availability and temperature which were decisive factors regulating soil microbial EEA. This study contributes decisively to the understanding of environmental factors on the microbial EEA in soils, specifically on the decisive influence of water availability and temperature on EEA. Unlike previous belief, optimum EEA in high temperature exposed soil upper layers can occur at low water availability (i.e., dryness) and high temperatures. This study shows the potential for a significant response by soil microbial EEA under conditions of high temperature and dryness due to a progressive environmental warming which will influence organic carbon decomposition at local and global scenarios.

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“…The contents of soil microbial biomass and nutrient elements were simultaneously altered after thinning management, which suggested that there was a close connection between soil elemental stoichiometry and microorganisms [37,38]. Selectively reducing the forest density could increase the stand gap size, thereby enhancing light transmittance, soil hydrothermal condition, and enzymatic activity [39][40][41]. As a consequence, the forest understory micro-environment factors changed, increasing the rate of decomposition of surface litter and roots [11,42].…”

Section: Variation Of Soil Properties and Stoichiometry Following Thimentioning

confidence: 99%

Soil Element Stoichiometry Drives Bacterial Community Composition Following Thinning in A Larix Plantation in the Subalpine Regions of Northern China

Cai

Peng

Cheng

et al. 2020

Forests

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It is well established that forest thinning alters aboveground plant community composition and soil resource availability. However, how it regulates the composition and diversity of belowground microbial communities remains unclear. To quantify the effects of thinning on soil bacterial groups and the underlying mechanisms of these effects, this research was conducted in a Larix principis-rupprechtii Mayr. plantation with various thinning intensities, including a control (0% tree removal), a low-intensity treatment (15% tree removal), a medium-intensity treatment (35% tree removal), and a high-intensity treatment (50% tree removal). Compared to the control, the medium and high intensity thinning treatments significantly improved soil moisture, nutrient concentrations (including soil total carbon, nitrogen, phosphorus, and ammonium nitrogen), microbial biomass, and elemental stoichiometry ratios. The abundance and diversity of bacterial communities peaked in the medium-intensity treatment. Thinning also had strong effects on dominant bacterial groups at the phylum level. For instance, Bacteroidetes and Nitrospirae were significantly increased in the medium-intensity treatment (MIT), while the Gemmatimonadetes were significantly decreased in the low-intensity treatment (LIT). Combining Spearman correlation analysis and redundancy analysis demonstrated that thinning could facilitate the assembly of unique bacterial communities, and these shifts in microorganisms could probably be attributed to corresponding changes in soil resource stoichiometry. In conclusion, this study provides novel evidence that rational thinning could promote belowground bacterial community diversity and that elemental stoichiometry is an important indicator in shaping forest soil bacterial communities.

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Precipitation affects soil microbial and extracellular enzymatic responses to warming

Cited by 83 publications

References 52 publications

A quantitative framework reveals ecological drivers of grassland microbial community assembly in response to warming

A quantitative framework reveals ecological drivers of grassland microbial community assembly in response to warming

Environmental factors affect the response of microbial extracellular enzyme activity in soils when determined as a function of water availability and temperature

Soil Element Stoichiometry Drives Bacterial Community Composition Following Thinning in A Larix Plantation in the Subalpine Regions of Northern China

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