KOPRI Repository

COMPARATIVE ANALYSIS OF MICROBIAL COMMUNITIES INHABITING TWO DIFFERENT ROCKS IN HIGH ARCTIC: MARTIAN ANALOGUE STUDIES

Metadata Downloads
Title
COMPARATIVE ANALYSIS OF MICROBIAL COMMUNITIES INHABITING TWO DIFFERENT ROCKS IN HIGH ARCTIC: MARTIAN ANALOGUE STUDIES
Other Titles
고위도 북극의 암석 미생물 비교분석
Authors
Choe, Yong-Hoe
Lee, Yoo Kyung
Kim, Mincheol
Keywords
극지미생물; 암석미생물; 우주생물학
Issue Date
2017
Citation
Choe, Yong-Hoe, Lee, Yoo Kyung, Kim, Mincheol. 2017. COMPARATIVE ANALYSIS OF MICROBIAL COMMUNITIES INHABITING TWO DIFFERENT ROCKS IN HIGH ARCTIC: MARTIAN ANALOGUE STUDIES. Astrobiology Science Conference 2017. 미국 애리조나 피닉스. 2017.04.23~2017.04.28.
Abstract
Rocks in the high Arctic can be a suitable habitat for microorganisms by protecting them from harsh abi-otic factors such as low temperatures, water deficit and high UV. The geochemical and textural properties of rocks affect how susceptible, or bioreceptive, a rock is to colonization by different microorganisms [1, 2]. In this study, to understand how different characteristics of the rock affect microbial community composition, we examined the diversity of rock-inhabiting microbes that colonize sandstone and limestone in Svalbard. The Svalbard archipelago, situated in the Arctic Ocean north of mainland Europe (74 to 81N, 10 to 35E), has a cold (average temperature - 6C) and dry (210 mm of annual rainfall in Longyearbyen) climate and harbors numerous sites analogous to Mars. We collected two types of rocks (sandstone and limestone) in Svalbard. A combination of paired-end sequencing and microscopy methods was used to assess the diver-sity and abundance of rock-inhabiting microbial com-munities on the rocks. Also, we determined the geo-chemical and textural properties of rocks using several analytical procedures. Preliminary results of taxonomic assignments of the sequence reads revealed that the dominant bacterial phyla, in both rock types, were Actinobacteria, Acido-bacteria and proteobacteria, and that their relative distribution was slightly different between the two rocks. Other phyla such as Bacteriodetes, Cyanobacte-ria, and Planctomycetes were also present consistently across all samples, but in lower abundance (Fig. 1). To further understand diversity and composition of lithic microbes, we analyze archaea, eukaryote and fungi. Our findings contribute to the current understand-ing of microbial diversity in both the high Arctic and different types of rocks, and identify physical and chemical rock properties as determinants of patterns in lithic microbial community. Also, this provide insight into geobiological processes that shape the biosphere and help us understand the cold and dry extraterrestrial habitats.
URI
http://repository.kopri.re.kr/handle/201206/7217
Conference Name
Astrobiology Science Conference 2017
Conference Place
미국 애리조나 피닉스
Conference Date
2017.04.23~2017.04.28
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse