Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2009JG001107 |
Diversity of rock varnish bacterial communities from Black Canyon, New Mexico | |
Northup, Diana E.1; Snider, Jessica R.1; Spilde, Michael N.2; Porter, Megan L.3; van de Kamp, Jodie L.4; Boston, Penelope J.5; Nyberg, April M.6; Bargar, John R.7 | |
通讯作者 | Northup, Diana E. |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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ISSN | 0148-0227 |
出版年 | 2010 |
卷号 | 115 |
英文摘要 | Scientists vigorously debate the degree to which rock varnish is formed through the actions of microorganisms. To investigate this enigma, we utilized a three-pronged approach that combined (1) culture-independent molecular methods to characterize bacterial communities associated with varnish that coats the rhyolitic volcanic rocks of Black Canyon, New Mexico, and rocks with no visible varnish; (2) culturing of varnish in media supplemented with reduced forms of manganese and/or iron and no or low amounts of carbon to isolate bacteria capable of precipitating iron and/or manganese oxides; and (3) scanning electron microscopy (SEM) of varnish and nearby rock that lacks macroscopically visible varnish. Our culture-independent studies revealed significant differences between varnish and nonvarnish communities. Chloroflexi and Ktedobacteria dominated one varnish site, while the other varnish site was dominated by Cyanobacteria. The nonvarnish sites were dominated by Actinobacteria and, to a lesser extent, Cyanobacteria and were the only samples to contain Deinococcus-Thermus sequences. Approximately 65% of varnish cultures produced visible manganese precipitates. Most culture isolates were not closely related to known manganese oxidizers, with the exception of Bacillus spp. SEM revealed microbial morphologies and two types of varnish morphologies: (1) relatively smooth layers and (2) patches of botryoidal pinnacles, which were often associated with increased manganese concentrations. "Bare" rock showed evidence of incipient varnish. These results have important implications for the detection of life on extraterrestrial planets such as Mars, where putative varnish coatings have been observed, and represent some of the first culture-independent characterizations of varnish communities. |
类型 | Article |
语种 | 英语 |
国家 | USA ; Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000277259800001 |
WOS关键词 | 16S RIBOSOMAL-RNA ; MULTIPLE SEQUENCE ALIGNMENT ; MANGANESE-OXIDIZING BACTERIA ; DESERT VARNISH ; LACTOBACILLUS-PLANTARUM ; MAXIMUM-LIKELIHOOD ; WHIPPLE MOUNTAINS ; ELECTRON-PROBE ; SONORAN DESERT ; MOJAVE DESERT |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
来源机构 | Commonwealth Scientific and Industrial Research Organisation |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/165241 |
作者单位 | 1.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA; 2.Univ New Mexico, Inst Meteorit, Albuquerque, NM 87131 USA; 3.Univ Maryland Baltimore Cty, Dept Biol Sci, Baltimore, MD 21250 USA; 4.CSIRO Marine & Atmospher Res, Hobart, Tas 7000, Australia; 5.New Mexico Inst Min & Technol, Earth & Environm Sci Dept, Socorro, NM 87801 USA; 6.ARS, USDA, Corvallis, OR 97333 USA; 7.Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA |
推荐引用方式 GB/T 7714 | Northup, Diana E.,Snider, Jessica R.,Spilde, Michael N.,et al. Diversity of rock varnish bacterial communities from Black Canyon, New Mexico[J]. Commonwealth Scientific and Industrial Research Organisation,2010,115. |
APA | Northup, Diana E..,Snider, Jessica R..,Spilde, Michael N..,Porter, Megan L..,van de Kamp, Jodie L..,...&Bargar, John R..(2010).Diversity of rock varnish bacterial communities from Black Canyon, New Mexico.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,115. |
MLA | Northup, Diana E.,et al."Diversity of rock varnish bacterial communities from Black Canyon, New Mexico".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 115(2010). |
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