Increases in soil respiration following labile carbon additions linked to rapid shifts in soil microbial community composition

Cleveland, Cory C.; Nemergut, Diana R.; Schmidt, Steven K.; Townsend, Alan R.

doi:10.1007/s10533-006-9065-z

Cited by 358 publications

(197 citation statements)

References 43 publications

Supporting

Mentioning

173

Contrasting

Unclassified

Order By: Relevance

“…These community alterations were partly ascribed to the influence of seasonality and tree girdling on physicochemical parameters such as DOC) and DON, nitrate, ammonia, as well as soil temperature and soil moisture. Seasonality in temperate forest soils is reflected by alterations in soil moisture and soil temperature, being acknowledged control factors of soil microbial communities (Stres et al, 2008;Tabuchi et al, 2008;Cleveland et al, 2007). Both parameters were responsible for compositional shifts in soil bacterial communities determined in this study.…”

Section: Discussionmentioning

confidence: 65%

Seasonality and resource availability control bacterial and archaeal communities in soils of a temperate beech forest

et al. 2010

View full text Add to dashboard Cite

It was hypothesized that seasonality and resource availability altered through tree girdling were major determinants of the phylogenetic composition of the archaeal and bacterial community in a temperate beech forest soil. During a 2-year field experiment, involving girdling of beech trees to intercept the transfer of easily available carbon (C) from the canopy to roots, members of the dominant phylogenetic microbial phyla residing in top soils under girdled versus untreated control trees were monitored at bimonthly intervals through 16S rRNA gene-based terminal restriction fragment length polymorphism profiling and quantitative PCR analysis. Effects on nitrifying and denitrifying groups were assessed by measuring the abundances of nirS and nosZ genes as well as bacterial and archaeal amoA genes. Seasonal dynamics displayed by key phylogenetic and nitrogen (N) cycling functional groups were found to be tightly coupled with seasonal alterations in labile C and N pools as well as with variation in soil temperature and soil moisture. In particular, archaea and acidobacteria were highly responsive to soil nutritional and soil climatic changes associated with seasonality, indicating their high metabolic versatility and capability to adapt to environmental changes. For these phyla, significant interrelations with soil chemical and microbial process data were found suggesting their potential, but poorly described contribution to nitrification or denitrification in temperate forest soils. In conclusion, our extensive approach allowed us to get novel insights into effects of seasonality and resource availability on the microbial community, in particular on hitherto poorly studied bacterial phyla and functional groups.

show abstract

Section: Discussionmentioning

confidence: 65%

Seasonality and resource availability control bacterial and archaeal communities in soils of a temperate beech forest

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Another example is the role of microorganisms. The first-order kinetics used in most models obviates the role that microbial decomposers are known to play in controlling SOC mineralization (Cleveland et al, 2007;Garcia-Pausas and Paterson, 2011), but their activities is controlled by physical and chemical drivers (Kemmit et al, 2008). Therefore, ESMs have significant gaps in reproducing the mechanisms related to microbial dynamics such as priming (see definition below), which is the object of this study.…”

Section: B Guenet Et Al: Priming Effect In Global Land Biosphere Modelmentioning

confidence: 99%

Towards a representation of priming on soil carbon decomposition in the global land biosphere model ORCHIDEE (version 1.9.5.2)

et al. 2016

View full text Add to dashboard Cite

Abstract. Priming of soil carbon decomposition encompasses different processes through which the decomposition of native (already present) soil organic matter is amplified through the addition of new organic matter, with new inputs typically being more labile than the native soil organic matter. Evidence for priming comes from laboratory and field experiments, but to date there is no estimate of its impact at global scale and under the current anthropogenic perturbation of the carbon cycle. Current soil carbon decomposition models do not include priming mechanisms, thereby introducing uncertainty when extrapolating short-term local observations to ecosystem and regional to global scale. In this study we present a simple conceptual model of decomposition priming, called PRIM, able to reproduce laboratory (incubation) and field (litter manipulation) priming experiments. Parameters for this model were first optimized against data from 20 soil incubation experiments using a Bayesian framework. The optimized parameter values were evaluated against another set of soil incubation data independent from the ones used for calibration and the PRIM model reproduced the soil incubations data better than the original, CENTURYtype soil decomposition model, whose decomposition equations are based only on first-order kinetics. We then compared the PRIM model and the standard first-order decay model incorporated into the global land biosphere model OR-CHIDEE (Organising Carbon and Hydrology In Dynamic Ecosystems). A test of both models was performed at ecosystem scale using litter manipulation experiments from five sites. Although both versions were equally able to reproduce observed decay rates of litter, only ORCHIDEE-PRIM could simulate the observed priming (R 2 = 0.54) in cases where litter was added or removed. This result suggests that a conceptually simple and numerically tractable representation of priming adapted to global models is able to capture the sign and magnitude of the priming of litter and soil organic matter.

show abstract

“…Dissolved organic matter (DOM) is readily decomposable and can be preferentially utilized by the microorganisms than the recalcitrant fraction of SOC (Cleveland et al, 2004(Cleveland et al, , 2007Ghani et al, 2013;Kalbitz et al, 2003). It is estimated that about 3.8 Â 10 9 Mg yr À1 of total crop residues are produced in global agricultural ecosystems (Thangarajan et al, 2013), and large quantities of crop residues are retained in soils every year (Rochette and Gregorich, 1998).…”

Section: Introductionmentioning

confidence: 99%

Effects of plant-derived dissolved organic matter (DOM) on soil CO2 and N2O emissions and soil carbon and nitrogen sequestrations

Qiu

Ouyang

et al. 2015

Applied Soil Ecology

View full text Add to dashboard Cite

A B S T R A C TDissolved organic matter (DOM) in soils play an essential role in soil physical, chemical and biological processes, but little information is available on the biodegradability of plant-derived DOM and its effect on soil carbon and nitrogen sequestration in field soils. The objectives of this study were to investigate the impacts of crop residue-derived DOM on soil CO 2 and N 2 O emissions, as well as soil carbon and nitrogen sequestration by adding water extracts of maize stalk (i.e., plant-derived DOM) to soils. In this study, wheat was grown in pots under field conditions with treated soils, the soils treatments were: plantderived DOM (PDOM), urea nitrogen (N), PDOM + urea nitrogen (PDOM + N), as well as a control with no additions to soil (CK). Adding plant-derived DOM to soil increased soil CO 2 and N 2 O emissions (P < 0.05). During the wheat growing season, the cumulative CO 2 -C emission from CK, PDOM, N and PDOM + N was 107 AE 1, 157 AE 7, 136 AE 2 and 149 AE 6 g C m À2 , respectively. Meanwhile, the cumulative N 2 O-N emission from CK, PDOM, N and PDOM + N was 188 AE 8, 256 AE 5, 239 AE 10 and 258 AE 7 mg N m À2 , respectively. Compared with N treatment, DOM addition had little effect on soil N sequestration, but it accelerated the decomposition of native soil organic carbon (SOC) and caused a net loss of SOC. The soil C sequestration decreased about 151 AE 67 and 51 AE 45 g C m À2 in PDOM and PDOM + N treatments, respectively. The increased microbial biomass and root biomass were responsible for the greater CO 2 emission in DOMamended soils. Negative correlation between dissolved organic carbon (DOC) content and N 2 O flux suggested that the release of N 2 O was dependent on the supply of DOC. These results indicated that the supply of plant-derived DOM exacerbated soil CO 2 and N 2 O emissions and reduced soil C sequestration. Therefore, agricultural management practices that increase the stability of highly soluble C inputs and/or retard the decomposition of crop residues should be adopted to decrease soil greenhouse gas emission and increase soil C sequestration.2015 Elsevier B.V. All rights reserved.

show abstract

Increases in soil respiration following labile carbon additions linked to rapid shifts in soil microbial community composition

Cited by 358 publications

References 43 publications

Seasonality and resource availability control bacterial and archaeal communities in soils of a temperate beech forest

Seasonality and resource availability control bacterial and archaeal communities in soils of a temperate beech forest

Towards a representation of priming on soil carbon decomposition in the global land biosphere model ORCHIDEE (version 1.9.5.2)

Effects of plant-derived dissolved organic matter (DOM) on soil CO2 and N2O emissions and soil carbon and nitrogen sequestrations

Contact Info

Product

Resources

About