The Study of Soil Bacterial Diversity and the Influence of Soil Physicochemical Factors in Meltwater Region of Ny-Ålesund, Arctic

Abstract

Global climate change has caused the changes of the ecological environment in the Arctic region, including sea ice melting, runoff increase, glacial lake expansion, and a typical meltwater area has formed in the Arctic coastal area. In this study, the meltwater areas near six different characteristic areas of Ny-Ålesund in 2018 were taken as the research objects, and high-throughput sequencing of V3–V4 regions of all samples were performed using 16S rDNA. Among the soil samples of six glacial meltwater areas in Ny-Ålesund, Arctic, the meltwater area near the reservoir bay had the highest bacterial abundance, and the meltwater area near the sand had the lowest one. The dominant phyla in soil samples were Proteobacteria, Actinobacteria, Acidobacteria. The NH4+-N content in intertidal soil was higher than that in subtidal soil. Through WGCNA analysis and LEFSE analysis, it was found that the core bacteria significantly related to NH4+-N were basically distributed in the intertidal area. For example, Nitrosomonadaceae, Nitrospira and Sphingomonas were the core bacteria showed significant different abundance in the intertidal area, which have the ability to metabolize NH4+-N. Our findings suggest that NH4+-N plays an important role in soil bacterial community structure in the Arctic meltwater areas.

Changes of Key Soil Factors, Biochemistry and Bacterial Species Composition during Seasons in the Rhizosphere and Roots of Codonopsis pilosula (tangshen)

“…Soil moisture may be an important factor affecting the diversity and composition of microorganisms in soil. The higher the soil moisture, the more beneficial it is to the increase in microbial diversity [51]. Temperature, precipitation and light were negatively correlated with TK and AK.…”

Paleometagenomics reveals environmental microbiome response to vegetation changes in northern Siberia over the millennia

“…Nitrosocosmicus and Nitrosopumilus ) and bacteria ( Nitrospira ) and denitrifiers ( Bradyrhizobium ) were key drivers of the ecosystem from 1900 years BP onwards, when modern‐like tundra established. These microorganisms are characteristic of arctic soils, particularly in permafrost‐affected wetlands (Alves et al, 2013, 2019; Pessi et al, 2022; Wang et al, 2022), where they play a role in the emissions of the greenhouse gas nitrous oxide (Prosser et al, 2020; Siljanen et al, 2019). Vegetation cover has been indicated as an important factor regulating the dynamics of nitrous oxide emissions in arctic terrestrial ecosystems (Voigt et al, 2020).…”