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Vertical distribution of bacterial community is associated with the degree of soil organic matter decomposition in the active layer of moist acidic tundra

Cited 3 time in scopus
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Title
Vertical distribution of bacterial community is associated with the degree of soil organic matter decomposition in the active layer of moist acidic tundra
Other Titles
산성 습지 툰드라 활동층의 유기물 분해정도와 관련된 세균 군집의 수직 분포
Authors
Kim, Hye Min
Lee, Yoo Kyung
Chun, Jongsik
Ro, Hee-Myong
Kim, Mincheol
Hwang, Chung Yeon
Jung, Ji Young
Lee, Mm Jin
Subject
Microbiology
Keywords
bacterial structure; depth profile; organic matter; soil pH; total phosphorus
Issue Date
2016
Citation
Kim, Hye Min, et al. 2016. "Vertical distribution of bacterial community is associated with the degree of soil organic matter decomposition in the active layer of moist acidic tundra". JOURNAL OF MICROBIOLOGY, 54(11): 713-723.
Abstract
The increasing temperature in Arctic tundra deepens the active layer, which is the upper layer of permafrost soil that experiences repeated thawing and freezing. The increasing of soil temperature and the deepening of active layer seem to affect soil microbial communities. Therefore, information on soil microbial communities at various soil depths is essential to understand their potential responses to climate change in the active layer soil. We investigated the community structure of soil bacterial in the active layer from moist acidic tundra in Council, Alaska. We also interpreted their relationship with some relevant soil physicochemical characteristics along soil depth. The bacterial community structure was found to change along soil depth. The relative abundances of Acidobacteria, Gammaproteobacteria, Planctomycetes, and candidate phylum WPS-2 rapidly decreased with soil depth, while those of Bacteroidetes, Chloroflexi, Gemmatimonadetes, and candidate AD3 rapidly increased. A structural shift was also found in the soil bacterial communities around 20 cm depth, where two organic (upper Oi and lower Oa) horizons are subdivided. The quality and the decomposition degree of organic matter might have influenced the bacterial community structure. Besides the organic matter quality, the vertical distribution of bacterial communities was also found to be related to soil pH and total phosphorous content. This study showed the vertical change of bacterial community in active layer with a fine scale resolution and the possible influence of the quality of soil organic matter on shaping bacterial community structure.
URI
http://repository.kopri.re.kr/handle/201206/6186
DOI
http://dx.doi.org/10.1007/s12275-016-6294-2
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