Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3389/fmicb.2015.00009 |
Microbial community composition of transiently wetted Antarctic Dry Valley soils | |
Niederberger, Thomas D.1; Sohm, Jill A.2,3; Gunderson, Troy E.2,3; Parker, Alexander E.4; Tirindelli, Joelle4; Capone, Douglas G.2,3; Carpenter, Edward J.4; Cary, Stephen C.1,5 | |
通讯作者 | Cary, Stephen C. |
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 | During the summer months, wet (hyporheic) soils associated with ephemeral streams and lake edges in the Antarctic Dry Valleys (DVs) become hotspots of biological activity and are hypothesized to be an important source of carbon and nitrogen for arid DV soils. Recent research in the DV has focused on the geochemistry and microbial ecology of lakes and arid soils, with substantially less information being available on hyporheic soils. Here, we determined the unique properties of hyporheic microbial communities, resolved their relationship to environmental parameters and compared them to archetypal arid DV soils. Generally, pH increased and chlorophyll a concentrations decreased along transects from wet to arid soils (9.0 to similar to 7.0 for pH and similar to 0.8 to similar to 5 mu g/cm(3) for chlorophyll a, respectively). Soil water content decreased to below 3% in the arid soils. Community fingerprinting-based principle component analyses revealed that bacterial communities formed distinct clusters specific to arid and wet soils; however, eukaryotic communities that clustered together did not have similar soil moisture content nor did they group together based on sampling location. Collectively, rRNA pyrosequencing indicated a considerably higher abundance of Cyanobacteria in wet soils and a higher abundance of Acidobacterial, Actinobacterial, Deinococcus/Thermus, Bacteroidetes, Firmicutes, Gemmatimonadetes, Nitrospira, and Planctomycetes in arid soils. The two most significant differences at the genus level were Gillisia signatures present in arid soils and chloroplast signatures related to Streptophyta that were common in wet soils. Fungal dominance was observed in arid soils and Viridiplantae were more common in wet soils. This research represents an in-depth characterization of microbial communities inhabiting wet DV soils. Results indicate that the repeated wetting of hyporheic zones has a profound impact on the bacterial and eukaryotic communities inhabiting in these areas. |
英文关键词 | Dry Valley Antarctica microbial diversity microbial community hyporheic |
类型 | Article |
语种 | 英语 |
国家 | USA ; New Zealand |
收录类别 | SCI-E |
WOS记录号 | WOS:000349100500001 |
WOS关键词 | POLAR DESERT ; BACTERIAL DIVERSITY ; VICTORIA LAND ; SP-NOV. ; FAMILY FLAVOBACTERIACEAE ; TAYLOR VALLEY ; MINERAL SOILS ; LAKE ICE ; STREAMS ; BIODIVERSITY |
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/2XILL650/187366 |
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 Environm Studies, Tiburon, CA USA; 5.Univ Waikato, Sch Sci, Hamilton 3240, New Zealand |
推荐引用方式 GB/T 7714 | Niederberger, Thomas D.,Sohm, Jill A.,Gunderson, Troy E.,et al. Microbial community composition of transiently wetted Antarctic Dry Valley soils[J],2015,6. |
APA | Niederberger, Thomas D..,Sohm, Jill A..,Gunderson, Troy E..,Parker, Alexander E..,Tirindelli, Joelle.,...&Cary, Stephen C..(2015).Microbial community composition of transiently wetted Antarctic Dry Valley soils.FRONTIERS IN MICROBIOLOGY,6. |
MLA | Niederberger, Thomas D.,et al."Microbial community composition of transiently wetted Antarctic Dry Valley soils".FRONTIERS IN MICROBIOLOGY 6(2015). |
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