scholarly journals Impact of chars and readily available carbon on soil microbial respiration and microbial community composition in a dynamic incubation experiment

2016 ◽  
Vol 164 ◽  
pp. 18-24 ◽  
Author(s):  
Giacomo Lanza ◽  
Philip Rebensburg ◽  
Jürgen Kern ◽  
Peter Lentzsch ◽  
Stephan Wirth
Keyword(s):  
Microbial Community ◽  
Community Composition ◽  
Microbial Respiration ◽  
Microbial Community Composition ◽  
Incubation Experiment ◽  
Soil Microbial ◽  
Soil Microbial Respiration ◽  
Available Carbon

scholarly journals New Soil, Old Plants, and Ubiquitous Microbes: Evaluating the Potential of Incipient Basaltic Soil to Support Native Plant Growth and Influence Belowground Soil Microbial Community Composition

2018 ◽  
Author(s):  
Aditi Sengupta ◽  
Priyanka Kushwaha ◽  
Antonia Jim ◽  
Peter A. Troch ◽  
Raina Maier
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Community Composition ◽  
Plant Species ◽  
Soil Microbial Community ◽  
Soil Loss ◽  
Microbial Community Composition ◽  
Parent Material ◽  
Native Plant ◽  
Soil Microbial

The plant-microbe-soil nexus is critical in maintaining biogeochemical balance of the biosphere. However, soil loss and land degradation are occurring at alarmingly high rates, with soil loss exceeding soil formation rates. This necessitates evaluating marginal soils for their capacity to support and sustain plant growth. In a greenhouse study, we evaluated the capacity of marginal incipient basaltic parent material to support native plant growth, and the associated variation in soil microbial community dynamics. Three plant species, native to the Southwestern Arizona-Sonora region were tested with three soil treatments including basaltic parent material, parent material amended with 20% compost, and potting soil. The parent material with and without compost supported germination and growth of all the plant species, though germination was lower than the potting soil. A 16S rRNA amplicon sequencing approach showed Proteobacteria to be the most abundant phyla in both parent material and potting soil, followed by Actinobacteria. Microbial community composition had strong correlations with soil characteristics but not plant attributes within a given soil material. Predictive functional potential capacity of the communities revealed chemoheterotrophy as the most abundant metabolism within the parent material, while photoheterotrophy and anoxygenic photoautotrophy were prevalent in the potting soil. These results show that marginal incipient basaltic soil has the ability to support native plant species growth, and non-linear associations may exist between plant-marginal soil-microbial interactions.

scholarly journals Consistent predictors of microbial community composition across scales in grasslands reveal low context-dependency

2021 ◽  
Author(s):  
Dajana Radujković ◽  
Sara Vicca ◽  
Margaretha van Rooyen ◽  
Peter Wilfahrt ◽  
Leslie Brown ◽  
...  
Keyword(s):  
Microbial Community ◽  
Community Composition ◽  
Spatial Scales ◽  
Regional Scale ◽  
Microbial Community Composition ◽  
Soil Microbial Communities ◽  
Plant Productivity ◽  
Context Dependency ◽  
Fungal Community Composition ◽  
Soil Microbial

Environmental circumstances shaping soil microbial communities have been studied extensively, but due to disparate study designs it has been difficult to resolve whether a globally consistent set of predictors exists, or context-dependency prevails. Here, we used a network of 18 grassland sites (11 sampled across regional plant productivity gradients) to examine i) if the same abiotic or biotic factors predict both large- and regional-scale patterns in bacterial and fungal community composition, and ii) if microbial community composition differs consistently with regional plant productivity (low vs high) across different sites. We found that there is high congruence between predictors of microbial community composition across spatial scales; bacteria were predominantly associated with soil properties and fungi with plant community composition. Moreover, there was a microbial community signal that clearly distinguished high and low productivity soils that was shared across worldwide distributed grasslands suggesting that microbial assemblages vary predictably depending on grassland productivity.

Sign in / Sign up

Export Citation Format

Share Document