scholarly journals Temperature sensitivity of soil respiration rates enhanced by microbial community response

Nature ◽  
2014 ◽  
Vol 513 (7516) ◽  
pp. 81-84 ◽  
Author(s):  
Kristiina Karhu ◽  
Marc D. Auffret ◽  
Jennifer A. J. Dungait ◽  
David W. Hopkins ◽  
James I. Prosser ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Respiration ◽  
Temperature Sensitivity ◽  
Community Response ◽  
Respiration Rates

scholarly journals Future Global Soil Respiration Rates Will Swell Despite Regional Decreases in Temperature Sensitivity Caused by Rising Temperature

2018 ◽  
Vol 6 (11) ◽  
pp. 1539-1554 ◽  
Author(s):  
Jinshi Jian ◽  
Meredith K. Steele ◽  
Susan D. Day ◽  
R. Quinn Thomas
Keyword(s):  
Soil Respiration ◽  
Temperature Sensitivity ◽  
Respiration Rates ◽  
Global Soil

scholarly journals New insights into the role of microbial community composition in driving soil respiration rates

2018 ◽  
Vol 118 ◽  
pp. 35-41 ◽  
Author(s):  
Yu-Rong Liu ◽  
Manuel Delgado-Baquerizo ◽  
Jun-Tao Wang ◽  
Hang-Wei Hu ◽  
Ziming Yang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Respiration ◽  
Community Composition ◽  
Microbial Community Composition ◽  
Respiration Rates

Legacy of constant and diurnally oscillating temperatures on soil respiration and microbial community structure.

2020 ◽  
Author(s):  
Adetunji Alex Adekanmbi ◽  
Yiran Zou ◽  
Xin Shu ◽  
Liz Shaw ◽  
Tom Sizmur
Keyword(s):  
Microbial Community ◽  
Organic Carbon ◽  
Soil Respiration ◽  
Constant Temperature ◽  
Temperature Sensitivity ◽  
Soil Microbial Community ◽  
Incubation Temperature ◽  
Measured Temperature ◽  
Measurement Temperature ◽  
Soil Microbial

<p>Increasing temperatures due to the greenhouse effect are known to increase soil respiration, releasing more CO<sub>2</sub> into the atmosphere and resulting in a positive feedback in our climate system. Diurnal oscillations in air temperatures influence soil temperatures and thus may affect soil microbial activities and organic carbon vulnerability. Laboratory incubation studies evaluating the temperature sensitivity of soil respiration frequently use measurements of respiration taken at a constant incubation temperature in soil that has also been pre-incubated at a constant temperature.  However, such constant temperature incubations do not represent the field situation, where soils undergo diurnal oscillations in temperate under the influence of changing air temperature. We investigated the effects of constant and diurnally oscillating temperatures on soil respiration, organic matter and soil microbial community composition. A Grassland soil from the UK was either incubated at a constant temperature of 5, 10 or 15 ºC , or diurnally oscillated between 5 and 15 ºC (increasing or decreasing at 2.5 ºC for 3 hour intervals within each 24 hours). Soil CO<sub>2</sub> flux was measured by temporarily moving incubated soils from each of the abovementioned treatments to 5, 10 or 15 ºC, such that soils incubated at each temperature had CO<sub>2</sub> flux measured at every temperature. Our approach used incubation and measurement temperatures as factors to explore the influence of incubation temperature on the respiration at the measured temperature and to determine temperature sensitivity of CO<sub>2</sub> flux for each incubation treatment. We hypothesised that a higher measurement temperature would result in greater CO<sub>2</sub> flux and that, irrespective of measurement temperature, CO<sub>2</sub> emitted from the 5 to 15 ºC oscillating incubation would be similar to that from the 10 ºC incubation. The results showed that both incubation and measurement temperatures influence soil respiration differently. Soil respiration measured at 15 ºC was greater than that of 5 and 10 ºC, irrespective of the incubation temperature. Incubating soil at a temperature oscillating between 5 and 15 oC resulted in greater CO<sub>2</sub> flux than constant incubations at 10 ºC or 5 ºC, but was statistically similar to 15 ºC. This may be because extracellular depolymerisation is the rate limiting step in soil respiration and the time spent at 15 ºC in the oscillating treatment was sufficient to depolymerise enough polysaccharides to maximise intracellular respiration. The greater CO<sub>2</sub> release in soils incubated at 15 ºC or oscillating between 5 and 15 ºC coincided with depletion of the soil organic carbon and a shift in the phospholipid fatty acid profile of the soil microbial community, consistent with thermal adaptation to higher temperatures. Dissolved organic carbon and C/N ratio significantly decreased in soils incubated at 15 ºC or oscillating between 5 and 15 ºC with attendant increase in the ratios of Gram negative to positive bacteria and cis/trans ratio, and decreased Fungi/Bacteria ratio. Our results suggest that daily maximum temperatures are more important than daily minimum or average temperatures when considering the response of soils to warming. </p><p> </p>

The Research on the Impact Factors of Low-Quality Stands Soil Respiration after Different Transformations in Greater Higgnan Mountains

2012 ◽  
Vol 610-613 ◽  
pp. 3217-3221
Author(s):  
Hao Ji ◽  
Xi Bin Dong
Keyword(s):  
Soil Respiration ◽  
Respiration Rate ◽  
Temperature Sensitivity ◽  
Influence Factors ◽  
Soil Surface ◽  
Impact Factors ◽  
Forest Gap ◽  
Soil Respiration Rate ◽  
Respiration Rates ◽  
The Impact

Low-quality stands in Greater Higgnan Mountains were transformed by clear-cuttings with different area of forest gaps, then larch were planted after induced transformations. The LI-8150 multi-channel automated soil CO2 flux system was used to measure CO2 flux on soil surface. Changes of different soil respiration rates and influence factors were analyzed after different transformations. The results indicated that the soil respiration rates were all raised after different transformations compared with no interfered control plots. After analyzing different transformations comprehensively, it showed that the soil respiration rate performed a negative correlation with the soil density significantly, while the correlation with soil organic matter and litter weight in little decomposed was positive (p﹤0.05). The largest Q10 with forest gap area of 625 m2 was 3.561. Influenced by soil respiration rate, soil underground with depth of 10cm showed the strongest temperature sensitivity. The smallest Q10 with forest gap area of 900 m2 was 2.312, and temperature sensitivity of soil was the weakest.

scholarly journals Temperature response of soil respiration largely unaltered with experimental warming

2016 ◽  
Vol 113 (48) ◽  
pp. 13797-13802 ◽  
Author(s):  
Joanna C. Carey ◽  
Jianwu Tang ◽  
Pamela H. Templer ◽  
Kevin D. Kroeger ◽  
Thomas W. Crowther ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Temperature Sensitivity ◽  
Boreal Forests ◽  
Temperature Response ◽  
Experimental Warming ◽  
Climatic Warming ◽  
Ambient Temperatures ◽  
Respiration Rates ◽  
Temperature Manipulation ◽  
Scientific Attention

The respiratory release of carbon dioxide (CO2) from soil is a major yet poorly understood flux in the global carbon cycle. Climatic warming is hypothesized to increase rates of soil respiration, potentially fueling further increases in global temperatures. However, despite considerable scientific attention in recent decades, the overall response of soil respiration to anticipated climatic warming remains unclear. We synthesize the largest global dataset to date of soil respiration, moisture, and temperature measurements, totaling >3,800 observations representing 27 temperature manipulation studies, spanning nine biomes and over 2 decades of warming. Our analysis reveals no significant differences in the temperature sensitivity of soil respiration between control and warmed plots in all biomes, with the exception of deserts and boreal forests. Thus, our data provide limited evidence of acclimation of soil respiration to experimental warming in several major biome types, contrary to the results from multiple single-site studies. Moreover, across all nondesert biomes, respiration rates with and without experimental warming follow a Gaussian response, increasing with soil temperature up to a threshold of ∼25 °C, above which respiration rates decrease with further increases in temperature. This consistent decrease in temperature sensitivity at higher temperatures demonstrates that rising global temperatures may result in regionally variable responses in soil respiration, with colder climates being considerably more responsive to increased ambient temperatures compared with warmer regions. Our analysis adds a unique cross-biome perspective on the temperature response of soil respiration, information critical to improving our mechanistic understanding of how soil carbon dynamics change with climatic warming.

scholarly journals Root Functional Trait and Soil Microbial Coordination: Implications for Soil Respiration in Riparian Agroecosystems

2021 ◽  
Vol 12 ◽  
Author(s):  
Kira A. Borden ◽  
Tolulope G. Mafa-Attoye ◽  
Kari E. Dunfield ◽  
Naresh V. Thevathasan ◽  
Andrew M. Gordon ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Soil Respiration ◽  
Microbial Community Structure ◽  
Root Length ◽  
Fine Root ◽  
Root Traits ◽  
Soil Microbial Community Structure ◽  
Soil Microbial ◽  
Respiration Rates

Predicting respiration from roots and soil microbes is important in agricultural landscapes where net flux of carbon from the soil to the atmosphere is of large concern. Yet, in riparian agroecosystems that buffer aquatic environments from agricultural fields, little is known on the differential contribution of CO2 sources nor the systematic patterns in root and microbial communities that relate to these emissions. We deployed a field-based root exclusion experiment to measure heterotrophic and autotrophic-rhizospheric respiration across riparian buffer types in an agricultural landscape in southern Ontario, Canada. We paired bi-weekly measurements of in-field CO2 flux with analysis of soil properties and fine root functional traits. We quantified soil microbial community structure using qPCR to estimate bacterial and fungal abundance and characterized microbial diversity using high-throughput sequencing. Mean daytime total soil respiration rates in the growing season were 186.1 ± 26.7, 188.7 ± 23.0, 278.6 ± 30.0, and 503.4 ± 31.3 mg CO2-C m–2 h–1 in remnant coniferous and mixed forest, and rehabilitated forest and grass buffers, respectively. Contributions of autotrophic-rhizospheric respiration to total soil CO2 fluxes ranged widely between 14 and 63% across the buffers. Covariation in root traits aligned roots of higher specific root length and nitrogen content with higher specific root respiration rates, while microbial abundance in rhizosphere soil coorindated with roots that were thicker in diameter and higher in carbon to nitrogen ratio. Variation in autotrophic-rhizospheric respiration on a soil area basis was explained by soil temperature, fine root length density, and covariation in root traits. Heterotrophic respiration was strongly explained by soil moisture, temperature, and soil carbon, while multiple factor analysis revealed a positive correlation with soil microbial diversity. This is a first in-field study to quantify root and soil respiration in relation to trade-offs in root trait expression and to determine interactions between root traits and soil microbial community structure to predict soil respiration.

Soil microbial community response to nitrogen and phosphorous fertilization in a temperate forest nursery

2018 ◽  
Vol 51 (2) ◽  
Author(s):  
Muhammad Razaq ◽  
Muhammad Sajjad Haider ◽  
Salah Uddin ◽  
Liu Chunping ◽  
Hai-Long Shen ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Temperate Forest ◽  
Community Response ◽  
Forest Nursery ◽  
Soil Microbial
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