pH and exchangeable aluminum are major regulators of microbial energy flow and carbon use efficiency in soil microbial communities

Jones, Davey L.; Cooledge, Emily C.; Hoyle, Frances C.; Griffiths, Robert I.; Murphy, Daniel V.

doi:10.1016/j.soilbio.2019.107584

Cited by 166 publications

(87 citation statements)

References 50 publications

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“…However, the metabolic quotient qCO 2 was not affected by salinity in or study in the short term but showed differences between the two investigated soils, indicating that the microbial communities adjusted their metabolism over a longer period of time. It was higher in soil B with a lower pH as compared to soil A, which is in line with Jones et al (2019), who observed a lower CUE in soils with lower pH (below 5.5). Soil B had a higher qCO 2 and therefore more C was used for maintenance of microbial cells, resulting in a less efficient C use, which in the long run yield a lower CUE and consequently may result in stronger organic matter decomposition.…”

Section: Distinct Microbial Response Of Different Soils Indicate Soilsupporting

confidence: 90%

“…The relative increase of saprotrophic fungi as indicated by the ergosterol-to-microbial biomass C ratio was positively related to an increase of the metabolic quotient qCO 2, a simple indicator of the demand of microorganisms to maintain their biomass or a simplified carbon use efficiency (CUE) (Joergensen and Wichern, 2018) Consequently, increased fungal dominance will result in lower C use efficiency as shown earlier (Nannipieri et al, 2003;Iqbal et al, 2016) and may result in organic matter loss in the long run. A higher specific metabolic activity may reflect stronger catabolic activity and production of osmolytes, cell repair or detoxification (Jones et al, 2019) and thus reflects an adaptation of the soil microbial community to abiotic stress, such as salinity (Wichern et al, 2006).…”

Section: Distinct Microbial Response Of Different Soils Indicate Soilmentioning

confidence: 99%

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Organic Amendments Alleviate Salinity Effects on Soil Microorganisms and Mineralisation Processes in Aerobic and Anaerobic Paddy Rice Soils

Wichern

Islam

Hemkemeyer

et al. 2020

Front. Sustain. Food Syst.

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Sea-water level rise leads to increased saltwater intrusion causing soil salinity on arable land with negative effects on soil microbial processes. Organic amendments are known to reduce the effects of salinity on soil microorganisms, therefore positively influencing microbial activity and nutrient cycling. However, the extent of this effect in paddy rice soils under aerobic compared to anaerobic conditions is unknown. Consequently, benefits of organic matter addition on carbon (C) and nitrogen (N) mineralisation under saline conditions were evaluated in a short-term laboratory incubation experiment. Two soils from Bangladesh were incubated with rice straw, manure or a manure-rice straw mixture at 50 and 100% water holding capacity (25 • C, 27 days). In addition, NaCl was added to half of the samples, which resulted in a set of non-saline (EC e = 1.1-1.3 dS m −1 ) and saline (EC e = 24.0-32.4 dS m −1 ) soils. Soil respiration (CO 2 -release) was measured throughout the experiment. At the end of the experiment, dissolved organic C, inorganic N, microbial biomass as well as bacterial, archaeal, and fungal domains were determined. Overall, effects of substrate addition overruled effects caused by salinity and water content. Microbial activity and biomass in particular fungi increased most strongly after rice straw addition and resulted in N immobilisation independent of moisture level. Rice straw and manure alleviated the effects of salinity on microorganisms; these were therefore mainly detectable in the non-amended soils. The reason for this is likely a higher C availability for soil microorganisms after amendment of organic materials, which allows them to produce osmolytes, counteracting the osmotic effects of increased salinity. However, the microbial communities of the two soils under investigation showed different response patterns to salinity reflected by a substantially higher fungi-bacteria ratio in soil B prone to salinity at 50% WHC as compared to soil A. Likewise, the metabolic quotient Wichern et al. Salinity Alleviation and Soil Microorganismswas higher in soil B and not affected by any of the short term treatments, revealing a soil legacy. Our results highlight the importance of organic amendments, such as rice straw to paddy soils under saline conditions to reduce negative effects on soil microbial processes, allowing them to maintain their major functions.

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Section: Distinct Microbial Response Of Different Soils Indicate Soilsupporting

confidence: 90%

Section: Distinct Microbial Response Of Different Soils Indicate Soilmentioning

confidence: 99%

Organic Amendments Alleviate Salinity Effects on Soil Microorganisms and Mineralisation Processes in Aerobic and Anaerobic Paddy Rice Soils

Wichern

Islam

Hemkemeyer

et al. 2020

Front. Sustain. Food Syst.

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show abstract

“…The thresholds for pH were established based largely on data from UK grasslands in the 1990s (Bhogal et al, 2008), which would represent sites that are in the process of recovery from intense acidification and therefore may not actually be similar to a true natural state. The pH trigger values for supporting metal retention and microbial function are actually contradictory to those suggested for supporting acid grassland and heathland habitats (<5 and >5, respectively), and recent results indicate microbial function may decrease below pH 5.5 rather than 5, exacerbating this difference (Jones, Cooledge, Hoyle, Griffiths, & Murphy, 2019). This shows the difficulties in designating appropriate boundaries when multiple functions and services are involved, especially when the different functions show differing responsiveness to change (Bhogal et al, 2008;Bünemann et al, 2018;Jarvis et al, 2019).…”

Section: Key Soil Parameters Status and Correlationsmentioning

confidence: 97%

Soil health cluster analysis based on national monitoring of soil indicators

Seaton

Barrett

Burden

et al. 2020

European J Soil Science

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A major challenge in soil science is to monitor and understand the state and change of soils at a national scale to inform decision making and policy. To address this, there is a need to identify key parameters for soil health and function and determine how they relate to other parameters, including traditional soil surveys. Here we present a national-scale dataset of topsoil sampled as part of a wider agri-environment monitoring scheme in Wales, UK. Over 1,350 topsoils (0-15 cm) were sampled across a very wide range of habitats and a range of physical, chemical and biological soil quality indicators were measured. We Highlights • We measured soil physicochemical properties in~1,350 sites in a variety of temperate habitats

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“…First, soil pH impacts the substrates and microenvironment for metabolic reactions ( Berg & Mcclaugherty, 2013 ; Jones et al, 2019 ), which change the microbial metabolic activity directly. Second, soil pH changes the abundance and activity of microbes participating in the metabolic reaction ( Berg & Mcclaugherty, 2013 ; Jones et al, 2019 ). The effects of soil pH on metabolic functions are the result of the combined action of various factors.…”

Section: Discussionmentioning

confidence: 99%

Soil properties and root traits jointly shape fine-scale spatial patterns of bacterial community and metabolic functions within a Korean pine forest

Teng

Tian

et al. 2021

PeerJ

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Spatial heterogeneity of soil bacterial community depends on scales. The fine-scale spatial heterogeneity of bacterial community composition and functions remains unknown. We analyzed the main driving factors of fine-scale spatial patterns of soil bacterial community composition and carbon metabolic functions across a 30 m × 40 m plot within a Korean pine forest by combining Illumina 16S rRNA sequencing with Biolog Ecoplates based on 53 soil samples. Clear spatial patterns in bacterial community composition and metabolic functions were observed in the forest soil. The bacterial community composition and metabolic functions both showed distance-decay of similarity within a distance of meters. Structural equation model analysis revealed that environmental variables and geographic distance together explained 37.9% and 63.1% of community and metabolic functions, respectively. Among all environmental factors, soil organic carbon (SOC) and root biomass emerged as the most important drivers of the bacterial community structure. In contrast, soil pH explained the largest variance in metabolic functions. Root biomass explained the second-largest variance in soil bacterial community composition, but root traits made no difference in metabolic functions variance. These results allow us to better understand the mechanisms controlling belowground diversity and plant-microbe interactions in forest ecosystems.

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pH and exchangeable aluminum are major regulators of microbial energy flow and carbon use efficiency in soil microbial communities

Cited by 166 publications

References 50 publications

Organic Amendments Alleviate Salinity Effects on Soil Microorganisms and Mineralisation Processes in Aerobic and Anaerobic Paddy Rice Soils

Organic Amendments Alleviate Salinity Effects on Soil Microorganisms and Mineralisation Processes in Aerobic and Anaerobic Paddy Rice Soils

Soil health cluster analysis based on national monitoring of soil indicators

Soil properties and root traits jointly shape fine-scale spatial patterns of bacterial community and metabolic functions within a Korean pine forest

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