Arid
DOI10.3389/fmicb.2015.01347
Carbon-Fixation Rates and Associated Microbial Communities Residing in Arid and Ephemerally Wet Antarctic Dry Valley Soils
Niederberger, Thomas D.1; Sohm, Jill A.2,3; Gunderson, Troy2,3; Tirindelli, Joelle4; Capone, Douglas G.2,3; Carpenter, Edward J.4; Cary, S. Craig1,5
通讯作者Cary, S. Craig
来源期刊FRONTIERS IN MICROBIOLOGY
ISSN1664-302X
出版年2015
卷号6
英文摘要

Carbon-fixation is a critical process in severely oligotrophic Antarctic Dry Valley (DV) soils and may represent the major source of carbon in these arid environments. However, rates of C-fixation in DVs are currently unknown and the microorganisms responsible for these activities unidentified. In this study, C-fixation rates measured in the bulk arid soils (<5% moisture) ranged from below detection limits to similar to 12 nmol C/cc/h. Rates in ephemerally wet soils ranged from 20 to 750 nmol C/cc/h, equating to turnover rates of similar to 7-140 days, with lower rates in stream associated soils as compared to lake-associated soils. Sequencing of the large subunit of RuBisCO (cbbL) in these soils identified green-type sequences dominated by the 1B cyanobacterial phylotype in both arid and wet soils including the RNA fraction of the wet soil. Red type cbbL genes were dominated by 1C actinobacterial phylotypes in arid soils, with wetted soils containing nearly equal proportions of 1C (actinobacterial and proteobacterial signatures) and 1D (algal) phylotypes. Complementary 16S rRNA and 18S rRNA gene sequencing also revealed distinct differences in community structure between biotopes. This study is the first of its kind to examine C-fixation rates in DV soils and the microorganisms potentially responsible for these activities.


英文关键词CO2 fixation Antarctic soils primary production Dry Valleys microbial communities
类型Article
语种英语
国家USA ; New Zealand
收录类别SCI-E
WOS记录号WOS:000366705300001
WOS关键词LARGE-SUBUNIT GENES ; VICTORIA LAND ; CARBOXYLASE/OXYGENASE GENES ; RUBISCO GENOTYPES ; ORGANIC-MATTER ; HYPORHEIC ZONE ; TAYLOR VALLEY ; MINERAL SOILS ; DIVERSITY ; BACTERIA
WOS类目Microbiology
WOS研究方向Microbiology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187382
作者单位1.Univ Delaware, Coll Marine & Earth Sci, Lewes, DE 19958 USA;
2.Univ So Calif, Wrigley Inst Environm Studies, Los Angeles, CA USA;
3.Univ So Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;
4.San Francisco State Univ, Romberg Tiburon Ctr, Tiburon, CA USA;
5.Univ Waikato, Int Ctr Terr Antarct Res, Hamilton, New Zealand
推荐引用方式
GB/T 7714
Niederberger, Thomas D.,Sohm, Jill A.,Gunderson, Troy,et al. Carbon-Fixation Rates and Associated Microbial Communities Residing in Arid and Ephemerally Wet Antarctic Dry Valley Soils[J],2015,6.
APA Niederberger, Thomas D..,Sohm, Jill A..,Gunderson, Troy.,Tirindelli, Joelle.,Capone, Douglas G..,...&Cary, S. Craig.(2015).Carbon-Fixation Rates and Associated Microbial Communities Residing in Arid and Ephemerally Wet Antarctic Dry Valley Soils.FRONTIERS IN MICROBIOLOGY,6.
MLA Niederberger, Thomas D.,et al."Carbon-Fixation Rates and Associated Microbial Communities Residing in Arid and Ephemerally Wet Antarctic Dry Valley Soils".FRONTIERS IN MICROBIOLOGY 6(2015).
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