Nitrifiers and denitrifiers respond rapidly to changed moisture and increasing temperature in a pristine forest soil

Szukics, Ute; Abell, Guy C. J.; Hödl, Verania; Mitter, Birgit; Sessitsch, Angela; Hackl, Evelyn; Zechmeister‐Boltenstern, Sophie

doi:10.1111/j.1574-6941.2010.00853.x

Cited by 240 publications

(142 citation statements)

References 50 publications

(59 reference statements)

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“…The total abundance of N cycle genes has been shown to respond to increased temperature (Szukics et al, 2010). Consistently, we found an increase in the relative abundance of microbial N cycle genes at the NS site, and to a lesser extent at the NC site (Figure 1).…”

Section: Resultssupporting

confidence: 73%

Microbial mediation of biogeochemical cycles revealed by simulation of global changes with soil transplant and cropping

et al. 2014

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Despite microbes’ key roles in driving biogeochemical cycles, the mechanism of microbe-mediated feedbacks to global changes remains elusive. Recently, soil transplant has been successfully established as a proxy to simulate climate changes, as the current trend of global warming coherently causes range shifts toward higher latitudes. Four years after southward soil transplant over large transects in China, we found that microbial functional diversity was increased, in addition to concurrent changes in microbial biomass, soil nutrient content and functional processes involved in the nitrogen cycle. However, soil transplant effects could be overridden by maize cropping, which was attributed to a negative interaction. Strikingly, abundances of nitrogen and carbon cycle genes were increased by these field experiments simulating global change, coinciding with higher soil nitrification potential and carbon dioxide (CO2) efflux. Further investigation revealed strong correlations between carbon cycle genes and CO2 efflux in bare soil but not cropped soil, and between nitrogen cycle genes and nitrification. These findings suggest that changes of soil carbon and nitrogen cycles by soil transplant and cropping were predictable by measuring microbial functional potentials, contributing to a better mechanistic understanding of these soil functional processes and suggesting a potential to incorporate microbial communities in greenhouse gas emission modeling.

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Section: Resultssupporting

confidence: 73%

Microbial mediation of biogeochemical cycles revealed by simulation of global changes with soil transplant and cropping

et al. 2014

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“…Our results show that soil warming did not significantly change the amoA gene copy numbers of AOA (see Fig. 1b), which is consistent with the result from an elevated temperature experiment in a pristine forest soil (Szukics et al 2010) and that the amoA gene copy numbers of AOB decreased significantly with fertilization (i.e., HF<F, Fig. 1b).…”

Section: Responses Of Aob and Aoa Abundance To Soil Warming And Fertisupporting

confidence: 79%

Abundance and community structure of ammonia oxidizing bacteria and archaea in a Sweden boreal forest soil under 19-year fertilization and 12-year warming

Long

Chen

et al. 2012

J Soils Sediments

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Purpose Boreal forests are considered to be more sensitive to global climate change compared with other terrestrial ecosystems, but the long-term impact of climate change and forest management on soil microbial functional diversity is not well understood. Ammonia-oxidizing bacteria (AOB) and archaea (AOA) are the most important players in nitrogen (N) cycling-associated processes in terrestrial ecosystems. This study investigated the separate and combined impacts of long-term soil warming and fertilization on soil AOB and AOA community structures and abundances in a Norway spruce stand in northern Sweden. Materials and methods The soil-warming experiment was established in the buffer zones of two irrigated plots (I) and complete nutrient solution plots (IL) since 1995. The warming treatment started in April each year by maintaining soil temperature on warmed plots at 5°C above the temperature in unwarmed plots using heating cables. In August 2006, soil samples were collected from eight subplots for molecular analysis. The abundance of bacterial and archaeal amoA genes was determined by quantitative polymerase chain reaction. Similarly, total bacterial and archaeal population sizes have also been determined. The diversity of AOB and AOA was assessed by constructing amoA gene clone libraries, and different genotypes were screened with restriction fragment length polymorphism. Results and discussion Results showed that fertilization did not significantly affect the abundance of the bacterial amoA gene under either warming or non-warming conditions; however, warming decreased the abundance under fertilization treatments. No significant effects of fertilization and soil warming were observed on the number of thaumarchaeal amoA gene copies across all treatments. In this study, amoA gene abundance of AOB was significantly higher than that of AOA across all treatments. The community structure of both AOB and AOA was strongly influenced by fertilization. For bacterial amoA genes, Nitrosospira cluster 2 was present across all treatments, but the only genotype was observed in the fertilization treatments while, for thaumarchaeal amoA genes, the relative abundance of soil cluster 5 increased in fertilization treatments. By comparison, soil-warming effects on AOB and AOA community structure were not significant. Canonical correspondence analysis showed a positive correlation between fertilization and both dominant genotypes of AOB and AOA. Conclusions These results indicated that the abundance of AOA and AOB was not affected by fertilization or warming alone, but the interaction of fertilization and warming reduced the abundance of AOB. The community composition of ammonia-oxidizers was more affected by the nutrientoptimized fertilization than the soil warming.

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“…Ebrahimi et al [21] found that, in two sequencing batch reactors (SBR) operated at 20ºC, 30ºC, and 35ºC, bacterial richness and diversity were clearly altered. Several other studies also demonstrated that temperature imposed a strong selective pressure on bacterial communities of activated sludge [22][23][24][25]. As with temperature, DO was also strongly and significantly linked to bacterial community variance in CCA analyses.…”

Section: Relationship Of Environmental Factors To the Bacterial Commumentioning

confidence: 63%

MiSeq Sequencing Analysis of Bacterial Community Structures in Wastewater Treatment Plants

Wen

Jin

Wang

et al. 2015

Pol. J. Environ. Stud.

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The bacterial communities of activated sludge from nine wastewater treatment plants (WWTPs) located in three cities in China were examined using high-throughput MiSeq sequencing. The results showed that there were 57 genera of bacterial populations commonly shared by all nine systems, including Ferruginibacter, Dechloromonas, Zoogloea, Gp4, Gp6, etc., indicating that there was a core microbial community in the microbial populations of WWTPs at different geographic locations. Canonical correspondence analysis (CCA) results indicated that the bacterial community variance correlated most strongly with water temperature, dissolved oxygen (DO), concentrations of chemical oxygen demand (COD), and solids retention time (SRT). Variance partitioning analyses suggested that wastewater characteristics had the greatest contribution to the bacterial community variance, explaining 21% of the variance of bacterial communities independently, followed by operational parameters (17%), and geographic location (11%). This study provided insights into the diversity and bacterial community structures in geographically distributed WWTPs.

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Nitrifiers and denitrifiers respond rapidly to changed moisture and increasing temperature in a pristine forest soil

Cited by 240 publications

References 50 publications

Microbial mediation of biogeochemical cycles revealed by simulation of global changes with soil transplant and cropping

Microbial mediation of biogeochemical cycles revealed by simulation of global changes with soil transplant and cropping

Abundance and community structure of ammonia oxidizing bacteria and archaea in a Sweden boreal forest soil under 19-year fertilization and 12-year warming

MiSeq Sequencing Analysis of Bacterial Community Structures in Wastewater Treatment Plants

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