Seasonal changes in soil microbial communities along a fertility gradient of temperate grasslands

Bardgett, Richard D.; Lovell, R. D.; Hobbs, P. J.; Jarvis, S. C.

doi:10.1016/s0038-0717(99)00016-4

Cited by 311 publications

(138 citation statements)

References 39 publications

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“…Our C mic and basal respiration rates were rather low in comparison with those of previous studies (Ros et al 2006a, b), probably because our samples were taken in autumn when soil microbial activity usually declines (Bardgett et al 1999), whereas Ros et al (2006b) sampled their soils in spring. Our results confirm those by Ros et al (2006b) who were able to show differences in C mic and basal respiration among the different treatments and a general decrease of these properties with soil depth.…”

Section: Basal Respiration and Microbial Biomasscontrasting

confidence: 66%

Substrate-induced volatile organic compound emissions from compost-amended soils

et al. 2010

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The agronomic effects of composts, mineral fertiliser and combinations thereof on chemical, biological and physiological soil properties have been studied in an 18-year field experiment. The present study aimed at tracing treatment effects by evaluating the volatile organic compound (VOC) emission of the differently treated soils: non-amended control, nitrogen fertilisation and composts (produced from organic waste and sewage sludge, respectively) in combination with nitrogen fertiliser. Microbial community structure was determined by denaturing gradient gel electrophoresis (DGGE). Aerobic and anaerobic soil VOC emission was determined after glucose amendment using proton transfer reaction-mass spectrometry (PTR-MS). After inducing VOC production by substrate (glucose) addition and at the same time reducing oxygen availability to impair degradation of the produced VOCs, we were able to differentiate among the treatments. Organic waste compost did not alter the VOC emissions compared to the untreated control, whilst sewage sludge composts and mineral fertilisation showed distinct effects. This differentiation was supported by DGGE analysis of fungal 18S rDNA fragments and confirms earlier findings on bacterial communities. Three major conclusions can be drawn: (1) VOC patterns are able to discriminate among soil treatments.(2) Sewage sludge compost and mineral fertilisation have not only the strongest impact on microbial community composition but also on VOC emission patterns, but specific tracer VOCs could not be identified. (3) Future efforts should aim at a PTR-MS-linked identification of the detected masses.

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Section: Basal Respiration and Microbial Biomasscontrasting

confidence: 66%

Substrate-induced volatile organic compound emissions from compost-amended soils

et al. 2010

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“…Although previous studies have examined the response of microbial composition to environmental change over multiple years (for example, Sheik et al, 2011;Gutknecht et al, 2012), only a handful have considered the effect of seasonal variation on these responses (for example, Lage et al, 2010;Bell et al, 2014). However, the fast generation times of microbes mean that composition can turnover quickly, even across seasons (Bardgett et al, 1999;Kennedy et al, 2006;Habekost et al, 2008;Cregger et al, 2012;Gutknecht et al, 2012). We hypothesize that this high background variability will have several, important consequences for global change responses.…”

Section: Introductionmentioning

confidence: 98%

“…Second, the response of microbial communities to environmental change will depend on the time of year. Seasonal variation in the traits of the microbial community could alter its response to environmental change (Bardgett et al, 1999;Niklaus et al, 2003;Cregger et al, 2012). Third, season-dependent responses will be particularly strong when the environmental parameter also varies seasonally.…”

Section: Introductionmentioning

confidence: 99%

Temporal variation overshadows the response of leaf litter microbial communities to simulated global change

et al. 2015

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Bacteria and fungi drive the decomposition of dead plant biomass (litter), an important step in the terrestrial carbon cycle. Here we investigate the sensitivity of litter microbial communities to simulated global change (drought and nitrogen addition) in a California annual grassland. Using 16S and 28S rDNA amplicon pyrosequencing, we quantify the response of the bacterial and fungal communities to the treatments and compare these results to background, temporal (seasonal and interannual) variability of the communities. We found that the drought and nitrogen treatments both had significant effects on microbial community composition, explaining 2-6% of total compositional variation. However, microbial composition was even more strongly influenced by seasonal and annual variation (explaining 14-39%). The response of microbial composition to drought varied by season, while the effect of the nitrogen addition treatment was constant through time. These compositional responses were similar in magnitude to those seen in microbial enzyme activities and the surrounding plant community, but did not correspond to a consistent effect on leaf litter decomposition rate. Overall, these patterns indicate that, in this ecosystem, temporal variability in the composition of leaf litter microorganisms largely surpasses that expected in a short-term global change experiment. Thus, as for plant communities, future microbial communities will likely be determined by the interplay between rapid, local background variability and slower, global changes.

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“…This difference may be due to the decreased C exudates from the roots of the O 3 -exposed crop. The changes in root exudation may affect rhizosphere microbial activity, potentially altering the ecological and nutrient dynamics in the rhizosphere (Bardgett et al, 1999). Edwards' study showed that the exudation of organic compounds from the roots of O 3 -exposed plants declined due to the reduced translocation of photosynthate to the roots, thereby decreasing the nutrient supply to soil microorganisms and resulting in lower microbial metabolism (Edwards, 1991).…”

Section: Discussionmentioning

confidence: 99%

Structure and function of rhizosphere and non-rhizosphere soil microbial community respond differently to elevated ozone in field-planted wheat

Chen¹,

Wang²,

He³

2015

Journal of Environmental Sciences

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Seasonal changes in soil microbial communities along a fertility gradient of temperate grasslands

Cited by 311 publications

References 39 publications

Substrate-induced volatile organic compound emissions from compost-amended soils

Substrate-induced volatile organic compound emissions from compost-amended soils

Temporal variation overshadows the response of leaf litter microbial communities to simulated global change

Structure and function of rhizosphere and non-rhizosphere soil microbial community respond differently to elevated ozone in field-planted wheat

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