Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3389/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
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ISSN | 1664-302X |
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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