Shifts in soil bacterial and archaeal communities during freeze-thaw cycles in a seasonal frozen marsh, Northeast China

Ren, Jia; Song, Changchun; Hou, Aixin; Song, Yanyu; Zhu, Xiaoyan; Cagle, Grace A.

doi:10.1016/j.scitotenv.2017.12.309

Cited by 55 publications

(33 citation statements)

References 65 publications

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“…The observed ribosomal gene copy numbers both in semi-fixed surfaces and in mature soils correspond with the previously obtained data on the microbial population abundance for soils and soil-like substrates in northern latitudes [36,37]. The higher abundance of bacterial ribosomal genes in comparison to the abundance of fungal genes in all samples can be explained by low diversity of plant communities at the studied plots; as previously shown in other studies, Fungi are more dependent on the plant communities of barren substrates than Bacteria [21].…”

Section: Discussionsupporting

confidence: 88%

Prokaryotic community shifts during soil formation on sands in the tundra zone

Железова

Чернов

Тхакахова

et al. 2018

Preprint

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14A chronosequence approach, i.e., a comparison of spatially distinct plots with different stages of 15 succession, is commonly used for studying microbial community dynamics during paedogenesis. 16 The successional traits of prokaryotic communities following sand fixation processes have 17 previously been characterized for arid and semi-arid regions, but they have not been considered 18 for the tundra zone, where the environmental conditions are unfavourable for the establishment 19 of complicated biocoenoses. In this research, we characterized the prokaryotic diversity and 20 abundance of microbial genes found in a typical tundra and wooded tundra along a gradient of 21 increasing vegetation -unfixed aeolian sand, semi-fixed surfaces with mosses and lichens, and 22 mature soil under fully developed plant cover. Microbial communities from typical tundra and 23 wooded tundra plots at three stages of sand fixation were compared using quantitative 24 polymerase chain reaction (qPCR) and high-throughput sequencing of 16S rRNA gene libraries. 25The abundances of ribosomal genes increased gradually in both chronosequences, and a similar 26 trend was observed for the functional genes related to the nitrogen cycle (nifH, bacterial amoA, 27 nirK and nirS). The relative abundance of Planctomycetes increased, while those of 28 Thaumarchaeota, Cyanobacteria and Chloroflexi decreased from unfixed sands to mature soils. 29According to β-diversity analysis, prokaryotic communities of unfixed sands were more 30 heterogeneous compared to those of mature soils. Despite the differences in the plant cover of 31 the two mature soils, the structural compositions of the prokaryotic communities were shaped in 32 the same way. 33 34 35 3 36 4 61structure during soil formation [20]. In comparison to bacteria, fungi are less adapted to life on 62 barren substrates and depend strongly on plants during the early stages of colonization [21]. 63The diversity of soil microorganisms changes during the process of soil formation; however, 64 there is no distinct and universal pattern of prokaryotic diversity shifts with the successional 65 stage of paedogenesis [2,3,20,22]. Previous studies have shown that at the earliest stages of soil 66 formation after the retreat of glaciers (0 -100 years), the bacterial diversity was relatively low, 67 whereas it increased with the age of soil [2] or was the highest in middle-aged soils [3]. In 68 contrast, in a longer timescale of ecosystem development (60 -120 000 years), the diversity of 69 the soil prokaryotic community decreased with the site age [22]. The patterns of prokaryotic 70 diversity change among chronosequences of soil formation have been mostly studied for glacier 71 retreats but not for soils formed on aeolian sand dunes. 72The aim of this research was to reveal the traits of microbial community succession during sand 73 fixation in the tundra zone. Two chronosequences of soil formation on aeolian sands with similar 74 initial stages and different mature vegetation (typical tundra ...

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Section: Discussionsupporting

confidence: 88%

Prokaryotic community shifts during soil formation on sands in the tundra zone

Железова

Чернов

Тхакахова

et al. 2018

Preprint

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“…To discern whether microbial methanogenesis in anaerobic soils exhibits a compensatory response to temperature change, we collected wetland soil samples from plots established at four sites in the Greater Khingan Range (GKR) and four sites on the Tibetan Plateau (TP) (Supplementary Table 1). Because of the differences in the soil methanogenic community and physicochemical properties between the selected GKR and TP soils 25,26 , there might be considerable differences in the thermal responses of methanogens to temperature change in these contrasting soils, and the use of these soils may convincingly test the compensatory response of microbial CH 4 respiration to changing temperature and its underlying mechanisms.…”

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confidence: 99%

The thermal response of soil microbial methanogenesis decreases in magnitude with changing temperature

Chen

Zhu

et al. 2020

Nat Commun

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Microbial methanogenesis in anaerobic soils contributes greatly to global methane (CH4) release, and understanding its response to temperature is fundamental to predicting the feedback between this potent greenhouse gas and climate change. A compensatory thermal response in microbial activity over time can reduce the response of respiratory carbon (C) release to temperature change, as shown for carbon dioxide (CO2) in aerobic soils. However, whether microbial methanogenesis also shows a compensatory response to temperature change remains unknown. Here, we used anaerobic wetland soils from the Greater Khingan Range and the Tibetan Plateau to investigate how 160 days of experimental warming (+4°C) and cooling (−4°C) affect the thermal response of microbial CH4 respiration and whether these responses correspond to changes in microbial community dynamics. The mass-specific CH4 respiration rates of methanogens decreased with warming and increased with cooling, suggesting that microbial methanogenesis exhibited compensatory responses to temperature changes. Furthermore, changes in the species composition of methanogenic community under warming and cooling largely explained the compensatory response in the soils. The stimulatory effect of climate warming on soil microbe-driven CH4 emissions may thus be smaller than that currently predicted, with important consequences for atmospheric CH4 concentrations.

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“…Also known as Methylotrophic methanogens, Methanomassiliicoccales can metabolize methanol [55,56], and mostly originated from animal intestinal and rumen tracts [57,58]. As supported by the ndings of this study, they are generally less distributed in environmental ecosystems due to limited methylic precursors [59,60]. Nevertheless, Methanomassiliicoccales or unclassi ed Thermoplasmata-like species can utilize the noncompetitive methyl compounds as a preferred substrate to participate in the synthesis of methane [61], when acetoclastic and hydrogenotrophic methanogenesis are hindered [62].…”

Section: Discussionmentioning

confidence: 56%

Characteristics and Metabolic Patterns of Soil Methanogenic Archaea Communities in the High Latitude Natural Wetlands of China

Zhao

Bai

et al. 2020

Preprint

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Background: Soil methanogenic microorganisms are one of the primary methane-producing microbes in wetlands. However, we still poorly understand the community characteristic and metabolic patterns of these microorganisms according to vegetation type and seasonal changes. Therefore, to better elucidate the effects of the vegetation type and seasonal factors on the methanogenic community structure and metabolic patterns, we detected the characteristics of the soil methanogenic mcrA gene from three types of natural wetlands in different seasons in the Xiaoxing'an Mountain region, China. Result: The results indicated that the distribution of Methanobacteriaceae (hydrogenotrophic methanogens) was higher in winter, while Methanosarcinaceae and Methanosaetaceae accounted for a higher proportion in summer. Hydrogenotrophic methanogenesis was the dominant trophic pattern in each wetland. The results of principal coordinate analysis and cluster analysis showed that the vegetation type considerably influenced the methanogenic community composition. The methanogenic community structure in the Betula platyphylla – Larix gmelinii wetland was relatively different from the structure of the other two wetland types. Indicator species analysis further demonstrated that the corresponding species of indicator operational taxonomic units from the Alnus sibirica wetland and the Betula ovalifolia wetland were closer. Network analysis showed that cooperative and competitive relationships exist both within and between the same or different trophic methanogens. The core methanogens with higher abundance in each wetland were conducive to adaptation to environmental disturbances. Conclusions: This information is crucial for the assessment of metabolic patterns of soil methanogenic archaea and future fluxes in the wetlands of the Xiaoxing'an Mountain region given their vulnerability.

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Shifts in soil bacterial and archaeal communities during freeze-thaw cycles in a seasonal frozen marsh, Northeast China

Cited by 55 publications

References 65 publications

Prokaryotic community shifts during soil formation on sands in the tundra zone

Prokaryotic community shifts during soil formation on sands in the tundra zone

The thermal response of soil microbial methanogenesis decreases in magnitude with changing temperature

Characteristics and Metabolic Patterns of Soil Methanogenic Archaea Communities in the High Latitude Natural Wetlands of China

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