Soil Biogeochemical Cycle Couplings Inferred from a Function-Taxon Network

Ma, Bin; Stirling, Erinne; Liu, Yuanhui; Zhao, Kankan; Zhou, Jizhong; Singh, Brajesh K.; Tang, Caixian; Dahlgren, Randy A.; Xu, Jianming

doi:10.34133/2021/7102769

Cited by 33 publications

(12 citation statements)

References 52 publications

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“…Other similar coupling of soil biogeochemical processes was also found in recent research. 57 As a consequence, N 2 O and CO 2 emissions were synchronously stimulated (Figure 3c), implying linked production pathways between N 2 O and CO 2 . Furthermore, the concentration of solubilized C (DOC) regulated CO 2 emission, whereas mineralized N (DON + NH 4 + , rather than NO 3 − ) levels were the most strongly related to N 2 O emission throughout the entire incubation period (Figure S3a).…”

Section: Temporal Response Of Soil N Transformationmentioning

confidence: 84%

Dynamics of Soil Microbial N-Cycling Strategies in Response to Cadmium Stress

Zhao

Lin

Shi

et al. 2021

Environ. Sci. Technol.

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Globally increasing trace metal contamination of soils requires a better mechanistic understanding of metal-stress impacts on microbially mediated nutrient cycling. Herein, a 5-month laboratory experiment was employed to assess the effects of cadmium (Cd) on soil microbial N-cycling processes and associated functional gene abundance, with and without urea amendment. In non-N-amended soils, Cd progressively stimulated microbial populations for N acquisition from initial dissolved organic N (DON) to later recalcitrant organic N. The acceleration of N catabolism was synchronously coupled with C catabolism resulting in increased CO 2 /N 2 O fluxes and adenosine triphosphate (ATP) contents. The abundance of microbes deemed inefficient in N catabolism was gradually repressed after an initial stimulation period. We posit that enhanced exergonic N processes diminished the need for endergonic activities as a survival strategy for N communities experiencing metal stress. With urea amendment, Cd exhibited an initial stimulation effect on soil nitrification and a later a promotion effect on mineralization, along with an increase in the associated microbial populations. In N-amended soils, Cd accelerated N/C transformation processes, but decreased N 2 O and CO 2 fluxes by 19 and 14%, respectively. This implies that under eutrophic conditions, Cd synchronously altered microbial C/N metabolism from a dominance of catabolic to anabolic processes. These results infer a nutrient-based adjustment of microbial N-cycling strategies to enhance their metal resistance.

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Section: Temporal Response Of Soil N Transformationmentioning

confidence: 84%

Dynamics of Soil Microbial N-Cycling Strategies in Response to Cadmium Stress

Zhao

Lin

Shi

et al. 2021

Environ. Sci. Technol.

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“…During long-term recovery periods, the soil nutrient status (e.g., NH 4 + and DON) and soil pH contributed to bacterial communities in both burnt and unburnt soils, indicating that the quick recovery of bacterial communities was associated with the recovery of soil nutrient status and pH. Microbial biomass, diversity and communities often display strong associations with vegetation dynamics, such as vegetation biomass and diversity (Van Der Heijden et al, 2008;Chen et al, 2019;Ma et al, 2021). Vegetation interactions include 1) alteration of soil physico-chemical properties, such as pH, porosity and moisture (Liang et al, 2019;Bennett et al, 2020); 2) inputs of organic matter to support the heterotrophic microbial community, and 3) formation of mutualistic symbiosis between microorganisms and plant roots.…”

Section: Tablementioning

confidence: 99%

Concurrent and rapid recovery of bacteria and protist communities in Canadian boreal forest ecosystems following wildfire

Dai

et al. 2021

Soil Biology and Biochemistry

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“…Biogeochemical function couplings and their interactions with the microbial community are important ecological topics (Gao et al, 2021;Ma et al, 2021). Researchers have demonstrated that the connections among species, as well as between species and their habitats, have been disrupted due to the current dramatic global environmental changes, with far-reaching consequences for the future trajectory and functioning of entire ecosystems (Tylianakis et al, 2008;Valiente-Banuet et al, 2015;Ochoa-Hueso et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Sedimentary Nitrogen and Sulfur Reduction Functional-Couplings Interplay With the Microbial Community of Anthropogenic Shrimp Culture Pond Ecosystem

et al. 2022

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Sediment nitrogen and sulfur cycles are essential biogeochemical processes that regulate the microbial communities of environmental ecosystems, which have closely linked to environment ecological health. However, their functional couplings in anthropogenic aquaculture sedimentary ecosystems remain poorly understood. Here, we explored the sediment functional genes in shrimp culture pond ecosystems (SCPEs) at different culture stages using the GeoChip gene array approach with 16S amplicon sequencing. Dissimilarity analysis showed that the compositions of both functional genes and bacterial communities differed at different phases of shrimp culture with the appearance of temporal distance decay (p < 0.05). During shrimp culture, the abundances of nitrite and sulfite reduction functional genes decreased (p < 0.05), while those of nitrate and sulfate reduction genes were enriched (p < 0.05) in sediments, implying the enrichment of nitrites and sulfites from microbial metabolism. Meanwhile, nitrogen and sulfur reduction genes were found to be linked with carbon degradation and phosphorous metabolism (p < 0.05). The influence pathways of nutrients were demonstrated by structural equation modeling through environmental factors and the bacterial community on the nitrogen and sulfur reduction functions, indicating that the bacterial community response to environmental factors was facilitated by nutrients, and led to the shifts of functional genes (p < 0.05). These results indicate that sediment nitrogen and sulfur reduction functions in SCPEs were coupled, which are interconnected with the SCPEs bacterial community. Our findings will be helpful for understanding biogeochemical cycles in anthropogenic aquaculture ecosystems and promoting sustainable management of sediment environments through the framework of an ecological perspective.

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Soil Biogeochemical Cycle Couplings Inferred from a Function-Taxon Network

Cited by 33 publications

References 52 publications

Dynamics of Soil Microbial N-Cycling Strategies in Response to Cadmium Stress

Dynamics of Soil Microbial N-Cycling Strategies in Response to Cadmium Stress

Concurrent and rapid recovery of bacteria and protist communities in Canadian boreal forest ecosystems following wildfire

Sedimentary Nitrogen and Sulfur Reduction Functional-Couplings Interplay With the Microbial Community of Anthropogenic Shrimp Culture Pond Ecosystem

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