Vertical distribution of microbial communities and their response to metal(loid)s along the vadose zone–aquifer sediments

Zhong, Shan; Chen, Q.; Hu, Jing; Liu, S.; Qiao, Shihao; Ni, Jinren; Sun, Wanqing

doi:10.1111/jam.14742

Cited by 4 publications

(1 citation statement)

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“…This might be due to differences in environmental adaptations, cellular structure, and cellular metabolisms between bacteria and archaea (31)(32)(33). Our findings are consistent with those of other studies that have reported the dominant role of stochastic processes in structuring the soil archaeal communities in forests (18,43) and farmland (47). However, other studies have also revealed only a minor role of stochastic processes in governing the archaeal community assemblies in the Namib Desert (45) and in agricultural fields across eastern China (46).…”

Section: Discussionsupporting

confidence: 90%

Increasing Inundation Frequencies Enhance the Stochastic Process and Network Complexity of the Soil Archaeal Community in Coastal Wetlands

Gao

Peng

et al. 2021

Appl Environ Microbiol

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Coastal wetlands are experiencing frequent flooding because of global climate changes, such as the rising sea level. Despite the key role of archaea in soil biogeochemical cycles, the assembly processes and co-occurrence patterns of archaeal communities in coastal wetlands in response to increasing inundation frequencies remain elusive. Herein, we established an in situ mesocosm with an inundation frequency gradient to investigate the response of soil archaeal community toward increasing inundation frequencies in monocultures of Spartina alterniflora (SA) and a mangrove species, Kandelia obovata (KO). Both neutral community model and null model analyses suggested that stochastic processes are dominant in governing the archaeal community assembly, and that the stochastic processes are enhanced with increasing inundation frequencies. Increasing inundation frequencies significantly increased the community niche width. Moreover, archaeal community in SA soil displayed lower niche overlap and higher stochasticity than in KO soil. Co-occurrence network analysis revealed that the network complexity increases with increase in the inundation frequencies. Soil water content is the most decisive factor influencing the archaeal communities. Overall, we found that increasing inundation frequencies enhance the stochastic processes and network complexity of the soil archaeal community in coastal wetlands. This study could enhance our understanding on the response of soil archaeal communities in coastal wetlands toward global change. Importance Coastal wetlands, subjected to regular disturbances by periodic tidal, are highly productive and important in the regulation of climate change. However, the assembly mechanisms and co-occurrence patterns of soil archaeal communities in coastal areas remain poorly known, especially for their responses to increasing inundation frequencies. In this study, we aim at unravelling these uncertainties by studying typical estuarine ecosystems in southern China. We show that increasing inundation frequencies enhance the stochastic processes and network complexity of the soil archaeal community. This study offers a new path for an improved understanding of archaeal community assembly and species coexistence in coastal environments, with a special focus on the role of inundation frequency.

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