scholarly journals Response of Microbial Communities and Their Metabolic Functions to Drying–Rewetting Stress in a Temperate Forest Soil

2019 ◽  
Vol 7 (5) ◽  
pp. 129 ◽  
Author(s):  
Dong Liu ◽  
Katharina M. Keiblinger ◽  
Sonja Leitner ◽  
Uwe Wegner ◽  
Michael Zimmermann ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Global Climate ◽  
Soil Microbial Communities ◽  
Biogeochemical Cycles ◽  
Functional Responses ◽  
Soil Microbial ◽  
Metabolic Functions ◽  
Drying And Rewetting ◽  
Different Levels ◽  
Simultaneous Variation

Global climate change is predicted to alter drought–precipitation patterns, which will likely affect soil microbial communities and their functions, ultimately shifting microbially-mediated biogeochemical cycles. The present study aims to investigate the simultaneous variation of microbial community compositions and functions in response to drought and following rewetting events, using a soil metaproteomics approach. For this, an established field experiment located in an Austrian forest with two levels (moderate and severe stress) of precipitation manipulation was evaluated. The results showed that fungi were more strongly influenced by drying and rewetting (DRW) than bacteria, and that there was a drastic shift in the fungal community towards a more Ascomycota-dominated community. In terms of functional responses, a larger number of proteins and a higher functional diversity were observed in both moderate and severe DRW treatments compared to the control. Furthermore, in both DRW treatments a rise in proteins assigned to “translation, ribosomal structure, and biogenesis” and “protein synthesis” suggests a boost in microbial cell growth after rewetting. We also found that the changes within intracellular functions were associated to specific phyla, indicating that responses of microbial communities to DRW primarily shifted microbial functions. Microbial communities seem to respond to different levels of DRW stress by changing their functional potential, which may feed back to biogeochemical cycles.

Molecular and functional responses of soil microbial communities under grassland restoration

2008 ◽  
Vol 127 (3-4) ◽  
pp. 286-293 ◽  
Author(s):  
Pierre Plassart ◽  
Marthe Akpa Vinceslas ◽  
Christophe Gangneux ◽  
Anne Mercier ◽  
Sylvie Barray ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Soil Microbial Communities ◽  
Grassland Restoration ◽  
Functional Responses ◽  
Soil Microbial

scholarly journals Soil Microbial Community Responses to a Decade of Warming as Revealed by Comparative Metagenomics

2013 ◽  
Vol 80 (5) ◽  
pp. 1777-1786 ◽  
Author(s):  
Chengwei Luo ◽  
Luis M. Rodriguez-R ◽  
Eric R. Johnston ◽  
Liyou Wu ◽  
Lei Cheng ◽  
...  
Keyword(s):  
Climate Change ◽  
Microbial Communities ◽  
Molecular Mechanisms ◽  
Cellulose Degradation ◽  
Global Climate ◽  
Soil Microbial Communities ◽  
Predictive Ability ◽  
Metagenomic Data ◽  
Data Sets ◽  
Soil Microbial

ABSTRACTSoil microbial communities are extremely complex, being composed of thousands of low-abundance species (<0.1% of total). How such complex communities respond to natural or human-induced fluctuations, including major perturbations such as global climate change, remains poorly understood, severely limiting our predictive ability for soil ecosystem functioning and resilience. In this study, we compared 12 whole-community shotgun metagenomic data sets from a grassland soil in the Midwestern United States, half representing soil that had undergone infrared warming by 2°C for 10 years, which simulated the effects of climate change, and the other half representing the adjacent soil that received no warming and thus, served as controls. Our analyses revealed that the heated communities showed significant shifts in composition and predicted metabolism, and these shifts were community wide as opposed to being attributable to a few taxa. Key metabolic pathways related to carbon turnover, such as cellulose degradation (∼13%) and CO2production (∼10%), and to nitrogen cycling, including denitrification (∼12%), were enriched under warming, which was consistent with independent physicochemical measurements. These community shifts were interlinked, in part, with higher primary productivity of the aboveground plant communities stimulated by warming, revealing that most of the additional, plant-derived soil carbon was likely respired by microbial activity. Warming also enriched for a higher abundance of sporulation genes and genomes with higher G+C content. Collectively, our results indicate that microbial communities of temperate grassland soils play important roles in mediating feedback responses to climate change and advance the understanding of the molecular mechanisms of community adaptation to environmental perturbations.

Effects of land use, short-term drought and warming on microbial responses to drying and rewetting

2021 ◽  
Author(s):  
Ainara Leizeaga ◽  
Lettice Hicks ◽  
Albert Brangarí ◽  
Carla Cruz-Paredes ◽  
Menale Wondie ◽  
...  
Keyword(s):  
Land Use ◽  
Microbial Communities ◽  
Soil Microbial Communities ◽  
High Temporal Resolution ◽  
Northern Ethiopia ◽  
Land Uses ◽  
Soil Microbial ◽  
Drying And Rewetting ◽  
Microbial Responses ◽  
Simulated Drought

&lt;p&gt;Climate change predicts an increase in temperature and an intensification of the hydrological cycles resulting in more extreme drought and rainfall events. When dry soils experience a rainfall event, there is a big CO&lt;sub&gt;2&lt;/sub&gt; release from soil to the atmosphere which is regulated by soil microorganisms. In the present study, we set out to investigate how drought and warming affects the soil microbial responses to drying and rewetting (DRW); and how those responses are affected by differences in land use. Previous work has shown that exposure DRW cycles in the laboratory and in the field can induce faster recovery (more &amp;#8216;resilient&amp;#8217;) of the microbial responses after a DRW cycle. In addition, a history of drought has been suggested to result in microbial communities with higher carbon use efficiency (CUE) during DRW in a wet heathland in Northern Europe and in semi-arid grasslands in Texas. We wanted to extend these observations to subtropical environments.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;With the aim of simulating drought and warming, rain shelters and open top chambers (OTC) were installed in Northern Ethiopia in 2 contrasting land-uses (a degraded cropland and a pristine forest) for 1.5 years. Soils were then sampled and exposed to a DRW cycle in the laboratory. Microbial growth and respiration responses were followed with high temporal resolution over 3 weeks, as well as, changes in microbial community structure. &amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;Microbial functions universally showed a resilient response after a DRW cycle, with bacterial growth and fungal growth increasing immediately upon rewetting linked with the expected respiration response. The field treatments and land-use differences, therefore, did not have an effect on the resilience of soil microbial communities to DRW cycles. There were differences between the two main decomposer groups: fungi were more resilient than bacteria, as they showed a faster recovery rate. Microbial CUE upon rewetting responded differently in the different field treatments and land-uses. CUE was generally higher in croplands than in forests. Besides, while simulated drought reduced CUE, simulated drought increased CUE. These differences might be explained by either (i) the selection or more efficient microbial communities due to a higher exposure to DRW events or (ii) differences in resource availability (i.e. plant input). &amp;#160;&lt;/p&gt;

scholarly journals Taxonomic and functional responses of soil microbial communities to slag-based fertilizer amendment in rice cropping systems

2019 ◽  
Vol 127 ◽  
pp. 531-539 ◽  
Author(s):  
Suvendu Das ◽  
Hyo Suk Gwon ◽  
Muhammad Israr Khan ◽  
Joy D. Van Nostrand ◽  
Muhammad Ashraful Alam ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Cropping Systems ◽  
Soil Microbial Communities ◽  
Functional Responses ◽  
Soil Microbial ◽  
Rice Cropping Systems
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