Local-scale variation of soil bacterial communities in ice-free regions of maritime Antarctica
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- Local-scale variation of soil bacterial communities in ice-free regions of maritime Antarctica
- Other Titles
- 남극 바톤반도에서의 국지적 규모의 토양미생물의 공간분포 연구
- Kim, Mincheol
Hong, Soon Gyu
- Antarctic terrestrial ecosystem; microbial biogeography; soil bacterial community
- Issue Date
- Kim, Mincheol, et al. 2019. "Local-scale variation of soil bacterial communities in ice-free regions of maritime Antarctica". SOIL BIOLOGY & BIOCHEMISTRY, 133(0): 165-173.
- The majority of biogeographic studies in Antarctic terrestrial ecosystems have focused on macroscopic eukaryote
taxa. In contrast, microbial taxa have been almost neglected or examined without sufficient spatial coverage.
Here, we examined the spatial distribution of soil bacterial communities and their relation to local environmental
gradients in ice-free regions of the maritime Antarctic. Soils in this region were dominated by
Actinobacteria and Proteobacteria, which are typically found in Antarctic soils. Notably, candidate divisions AD3
and WPS-2, which rarely occur in other biomes, were found in high abundance in acidic surface soils. Soil pH
and total organic carbon (TOC) were the primary drivers of the bacterial community structure and various
geochemical variables also played important roles in structuring bacterial community composition. Bacterial
communities were significantly correlated to measured environmental variables, most of which are spatially
structured at the local spatial scale (0.5？8 km). This suggests that spatial heterogeneity of environmental factors
is an important driver of shifts in bacterial communities. Although various sets of environmental variables were
related to bacterial communities, a large proportion of community variation remained unexplained. This indicates
that bacterial communities in Antarctic soils may be governed by other biotic or abiotic factors which are
not typically measured in other biome studies.
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