Divergent assemblage patterns and driving forces for bacterial and fungal communities along a glacier forefield chronosequence

Jiang, Yonglei; Lei, Yutian; Yang, Yan; Korpelainen, Helena; Niinemets, Ülo; Li, Chunyang

doi:10.1016/j.soilbio.2017.12.019

Cited by 103 publications

(108 citation statements)

References 47 publications

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“…This trend was consistent with relatively higher and presumably more diverse sources of organic matter in the deglaciated soils. These observations are consistent with findings from other retreating glaciers (Jiang et al, 2018;Rime, Hartmann, Stierli, Anesio, & Frey, 2016;Smittenberg et al, 2012).…”

Section: Microbial Communities Changed With Warmingsupporting

confidence: 92%

Potential feedback mediated by soil microbiome response to warming in a glacier forefield

Wang

Liu

et al. 2019

Global Change Biology

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Mountain glaciers are retreating at an unprecedented rate due to global warming. Glacier retreat is widely believed to be driven by the physiochemical characteristics of glacier surfaces; however, the current knowledge of such biological drivers remains limited. An estimated 130 Tg of organic carbon (OC) is stored in mountain glaciers globally. As a result of global warming, the accelerated microbial decomposition of OC may further accelerate the melting process of mountain glaciers by heat production with the release of greenhouse gases, such as carbon dioxide (CO2) and methane. Here, using short‐term aerobic incubation data from the forefield of Urumqi Glacier No. 1, we assessed the potential climate feedback mediated by soil microbiomes at temperatures of 5°C (control), 6.2°C (RCP 2.6), 11°C (RCP 8.5), and 15°C (extreme temperature). We observed enhanced CO2‐C release and heat production under warming conditions, which led to an increase in near‐surface (2 m) atmospheric temperatures, ranging from 0.9°C to 3.4°C. Warming significantly changed the structures of the RNA‐derived (active) and DNA‐derived (total) soil microbiomes, and active microbes were more sensitive to increased temperatures than total microbes. Considering the positive effects of temperature and deglaciation age on the CO2‐C release rate, the alterations in the active microbial community structure had a negative impact on the increased CO2‐C release rate. Our results revealed that glacial melting could potentially be significantly accelerated by heat production from increased microbial decomposition of OC. This risk might be true for other high‐altitude glaciers under emerging warming, thus improving the predictions of the effects of potential feedback on global warming.

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Section: Microbial Communities Changed With Warmingsupporting

confidence: 92%

Potential feedback mediated by soil microbiome response to warming in a glacier forefield

Wang

Liu

et al. 2019

Global Change Biology

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“…We observed that the bacterial community had a higher diversity than the fungal community (Fig. S3), which confirmed the results of previous studies detailing other ecosystems (Ma et al ., ; Jiang et al ., ). One possible reason is that bacterial community can utilize simple compounds in sediments and generally show faster dynamic than fungal community, further contributing to the rapid establishment of bacterial diversity (Santonja et al ., ).…”

Section: Discussionmentioning

confidence: 97%

“…Based on the results of pRDA, the variations of bacterial and fungal community were significantly affected by biotic interaction, but with lower explanation power than the two abiotic processes (Table ). This may reflect that the interaction among species was less important than abiotic process in determining microbial community structure, which is an expected result considering that the environmental factors such as sediment nutrients directly provide the substrate for microbes (Jiang et al ., ) and geographic barrier greatly contributes to spatial separation of microbial species (Martiny et al ., ). Chen et al .…”

Section: Discussionmentioning

confidence: 97%

“…Jiang et al . () indicated that the more compact network topology of bacterial community than fungal community during assembly was determined by environmental selection process. Similarly, bacteria community with more compact network structure was also determined more by environmental heterogeneity than fungal community in this study (Table ).…”

Section: Discussionmentioning

confidence: 99%

“…Networks that have higher connectivity are considered to be linked to the quick responses of microorganisms to environmental perturbations (Zhou et al, 2010;Zhang et al, 2018a). Jiang et al (2018) indicated that the more compact network topology of bacterial community than fungal community during assembly was determined by environmental selection process. Similarly, bacteria community with more compact network structure was also determined more by environmental heterogeneity than fungal community in this study (Table 1).…”

Section: Controlling Factors For Biogeographic Patterns Of Bacterial mentioning

confidence: 99%

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Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Juan

Wang

et al. 2019

Environmental Microbiology

123

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Summary Despite the essential functions of sedimentary bacterial and fungal communities in biogeochemical cycling, little is known about their biogeographic patterns and driving processes in large rivers. Here we investigated the biogeographic assemblies and co‐occurrence patterns of sedimentary bacterial and fungal communities in the Jinsha River, one of the largest rivers in southwestern China. The mainstream of river was divided into upstream, midstream and downstream. The results showed that both bacterial and fungal communities differed significantly among three sections. For both communities, their composition variations in all sites or each river section were controlled by the combination of dispersal limitation and environmental selection, and dispersal limitation was the dominant factor. Compared with bacteria, fungi had stronger dispersal limitation. Co‐occurrence network analyses revealed higher network connectivity but a lower proportion of positive interaction in the bacterial than fungal network at all sites. In particular, the keystone species belonging to bacterial phyla Proteobacteria and Firmicutes and fungal phyla Ascomycota and Chytridiomycota may play critical roles in maintaining community function. Together, these observations indicate that fungi have a stronger dispersal limitation influence and less network connectivity than bacteria, implying different community assembly mechanisms and ecological functions between bacteria and fungi in large rivers.

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Multiple‐trophic patterns of primary succession following retreat of a high‐elevation glacier

Schmidt

Sommers

et al. 2021

Ecosphere

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How multiple, interacting components of complex soil communities assemble within forefields of receding glaciers is still largely unknown, especially at high-elevation sites (>5000 m a.s.l.) where plant succession is very slow. To examine succession of soil communities across different trophic levels, we investigated four major soil groups: bacteria, fungi, nematodes, and other non-fungal non-nematode microbial eukaryotes at the Puca Glacier in the Peruvian Andes spanning 9-, 24-, and 89-year-old deglaciated soils. This is the first study of microbial communities, other than bacteria, at a high-elevation chronosequence in the Andes Mountains. In addition, we characterized soil biogeochemical properties (e.g., C, N, moisture, and pH) and rates of microbial enzyme activities associated with C, N, and P acquisition. We found significantly correlated increases in estimated richness and high species turnover in all soil groups along the chronosequence. These shifts in soil communities were significantly correlated with microbial enzyme activities and measures of C, N, moisture, and pH. Stoichiometric comparisons of enzyme activities showed phosphorus (P) and carbon (C) limitation of microbial activity across the entire chronosequence with no hint of nitrogen (N) limitation. Taken together, the observed shifts in soil communities and biogeochemistry indicate coordinated increases in trophic complexity and ecosystem functioning during the initial 90 yr of microbial succession along the post-glacial chronosequence of the Puca Glacier.

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Divergent assemblage patterns and driving forces for bacterial and fungal communities along a glacier forefield chronosequence

Cited by 103 publications

References 47 publications

Potential feedback mediated by soil microbiome response to warming in a glacier forefield

Potential feedback mediated by soil microbiome response to warming in a glacier forefield

Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Multiple‐trophic patterns of primary succession following retreat of a high‐elevation glacier

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